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MP3/USB 2.0 High Speed Switch with Negative Signal Handling
ISL54206A
The Intersil ISL54206A dual SPDT (Single Pole/Double Throw) switches combine low distortion audio and accurate USB 2.0 high speed data (480Mbps) signal switching in the same low voltage device. When operated with a 2.7V to 3.6V single supply, these analog switches allow audio signal swings below-ground, allowing the use of a common USB and audio headphone connector in Personal Media Players and other portable battery powered devices. The ISL54206A logic control pins are 1.8V compatible, which allows for control via a standard controller. With a VDD voltage in the range of 2.7V to 3.6V, the IN pin voltage can exceed the VDD rail allowing for the USB 5V VBUS voltage from a computer to directly drive the IN pin to switch between the audio and USB signal sources in the portable device. The part has an audio enable control pin to open all the switches and put the part in a low power state. The ISL54206A is available in a small 10 Ld 2.1mmx1.6mm ultra-thin TQFN package and a 10 Ld 3mmx3mm TDFN package. It operates over a temperature range of -40C to +85C.
ISL54206A
Features
* High Speed (480Mbps) and Full Speed (12Mbps) Signaling Capability per USB 2.0 * Low Distortion Negative Signal Capability * Control Pin to Open all Switches and Enter Low Power State * Low Distortion Headphone Audio Signals - THD+N at 20mW into 32 Load. . . . . . . <0.1% * Cross-talk Audio Channels (20Hz to 20kHz) . . -110dB * Single Supply Operation (VDD) . . . . . 2.5V to 5.5V * -3dB Bandwidth USB Switches. . . . . . . . . 630MHz * Available in TQFN and TDFN Packages * Pb-Free (RoHS Compliant) * Compliant with USB 2.0 Short Circuit Requirements Without Additional External Components
Applications*(see page 17)
* MP3 and Other Personal Media Players * Cellular/Mobile Phones * PDA's * Audio/USB Switching
Related Literature*(see page 17)
* Technical Brief TB363 "Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)". * Application Note AN1337 "ISL54206AEVAL1Z Evaluation Board User's Manual".
Application Block Diagram
VDD USB AND HEADPHONE JACK ISL54206A VBUS IN CTRL LOGIC 4M COMDD+ L COM+ R GND CODEC USB HIGH-SPEED TRANSCEIVER CONTROLLER
NOTE: The L and R 50k resistors to ground are not shown.
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CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2007, 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL54206A
Pin Configurations
(Note 1) ISL54206A (10 LD TDFN) TOP VIEW
ISL54206A (10 LD TQFN) TOP VIEW
CTRL
10
4M 9 8 7 6 DD+ L R
VDD IN COM COM + GND
1 2 3 4 5
PD 4M LOGIC CONTROL
10 9 8 7 6
CTRL DD+ L R
VDD 1 IN 2 COM - 3 COM + 4
LOGIC CONTROL
5 GND
50k
50k
50k
50k
NOTE: 1. ISL54206A Switches shown for IN = Logic "0" and CTRL = Logic "1".
Truth Table
ISL54206A IN 0 0 1 CTRL 0 1 X L, R OFF ON OFF D+, DOFF OFF ON
Pin Descriptions
ISL54206A PIN NO. NAME 1 2 3 4 5 6 7 8 9 10 VDD IN Power Supply Digital Control Input FUNCTION
COM- Voice and Data Common Pin COM+ Voice and Data Common Pin GND R L D+ DGround Connection Audio Right Input Audio Left Input USB Differential Input USB Differential Input
IN: Logic "0" when 0.5V, Logic "1" when 1.4V with 2.7V to 3.6V supply. CTRL: Logic "0" when 0.5V or Floating, Logic "1" when 1.4V with 2.7V to 3.6V supply.
CTRL Digital Control Input (Audio Enable) PD Thermal Pad. Tie to Ground or Float (TDFN package only)
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Ordering Information
PART NUMBER (Note 5) ISL54206AIRTZ (Note 3) PART MARKING 06AZ TEMP. RANGE (C) -40 to +85 -40 to +85 -40 to +85 PACKAGE (Pb-Free) 10 Ld 3mmx3mm TDFN 10 Ld 3mmx3mm TDFN (Tape and Reel) 10 Ld 2.1mmx1.6mm TQFN (Tape and Reel) PKG. DWG. # L10.3x3A L10.3x3A L10.2.1x1.6A
ISL54206AIRTZ-T (Notes 2, 3) 06AZ ISL54206AIRUZ-T (Notes 2, 4) FU ISL54206AEVAL1Z NOTES:
Evaluation Board
2. Please refer to TB347 for details on reel specifications. 3. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 4. These Intersil Pb-free plastic packaged products employ special Pb-free material sets; molding compounds/die attach materials and NiPdAu plate - e4 termination finish, which is RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. 5. For Moisture Sensitivity Level (MSL), please see device information page for ISL54206A. For more information on MSL please see techbrief TB363.
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Absolute Maximum Ratings
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 6.0V Input Voltages D+, D-, L, R (Note 6). . . . . . . . . . - 2V to ((VDD) + 0.3V) IN (Note 6) . . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V CTRL (Note 6) . . . . . . . . . . . . . . . -0.3 to ((VDD) + 0.3V) Output Voltages COM-, COM+ (Note 6) . . . . . . . . . . -2V to ((VDD) + 0.3V) Continuous Current (Audio Switches) . . . . . . . . . . 150mA Peak Current (Audio Switches) (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . 300mA Continuous Current (USB Switches) . . . . . . . . . . . . 40mA Peak Current (USB Switches) (Pulsed 1ms, 10% Duty Cycle, Max) . . . . . . . . . 100mA ESD Rating: Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . >7kV Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . >400V Charged Device Model . . . . . . . . . . . . . . . . . . . . . >1.4kV Latch-up Tested per JEDEC; Class II Level A . . . . . . at 85C
Thermal Information
Thermal Resistance (Typical) JA (C/W) JC (C/W) 10 Ld TQFN (Notes 7, 8) . . . . . . . 145 90 10 Ld TDFN (Notes 9, 10) . . . . . . . 55 16 Maximum Junction Temperature (Plastic Package). . +150C Maximum Storage Temperature Range . . . -65C to +150C Pb-Free Reflow Profile . . . . . . . . . . . . . . . . . .see link below http://www.intersil.com/pbfree/Pb-FreeReflow.asp
Operating Conditions
Temperature Range . . . . . . . . . . . . . . . . . . -40C to +85C
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.
NOTES: 6. Signals on D+, D-, L, R, COM-, COM+, CTRL, IN exceeding VDD or GND by specified amount are clamped. Limit current to maximum current ratings. 7. JA is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details. 8. For JC, the "case temp" location is taken at the package top center. 9. JA is measured in free air with the component mounted on a high effective thermal conductivity test board with "direct attach" features. See Tech Brief TB379. 10. For JC, the "case temp" location is the center of the exposed metal pad on the package underside.
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V,
VINL = 0.5V, VCTRLH = 1.4V, VCTRLL = 0.5V, (Note 11), unless otherwise specified. Boldface limits apply over the operating temperature range, -40C to +85C. TEMP MIN MAX (C) (Notes 12, 15) TYP (Notes 12, 15) UNITS
PARAMETER ANALOG SWITCH CHARACTERISTICS Audio Switches (L, R) Analog Signal Range, VANALOG ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON RON Matching Between Channels, rON RON Flatness, RFLAT(ON)
TEST CONDITIONS
VDD = 3.0V, IN = 0.5V, CTRL = 1.4V VDD = 5.0V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or VR = -0.85V to 0.85V, (See Figure 3) VDD = 4.2V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or VR = -0.85V to 0.85V, (See Figure 3) VDD = 2.85V, IN = 0V, CTRL = VDD, ICOMx = 40mA, VL or VR = -0.85V to 0.85V, (See Figure 3) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or VR = -0.85V to 0.85V, (See Figure 3) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or VR = Voltage at max rON over signal range of -0.85V to 0.85V, (Note 14) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V, ICOMx = 40mA, VL or VR = -0.85V to 0.85V, (Note 13)
Full 25 25 25 25 Full 25 Full 25 Full
-1.5 -
2.47 2.50 2.87 2.65 0.02 0.03 -
1.5 4.0 5.5 0.13 0.16 0.05 0.07
V
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Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V,
VINL = 0.5V, VCTRLH = 1.4V, VCTRLL = 0.5V, (Note 11), unless otherwise specified. Boldface limits apply over the operating temperature range, -40C to +85C. (Continued) TEMP MIN MAX (C) (Notes 12, 15) TYP (Notes 12, 15) UNITS 25 50 k
PARAMETER Discharge Pull-Down Resistance, RL, RR
TEST CONDITIONS VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOM- or VCOM+ = -0.85V, 0.85V, VL or VR = -0.85V, 0.85V, VD+ and VD- = floating, Measure current through the discharge pull-down resistor and calculate resistance value. VDD = 3.6V, IN = 1.4V, CTRL = 1.4V VDD = 5.0V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or VD- = 5V (See Figure 4) VDD = 4.2V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or VD- = 4.2V (See Figure 4) VDD = 2.85V, IN = VDD, CTRL = VDD, ICOMx = 1mA, VD+ or VD- = 2.85V (See Figure 4) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 1mA, VD+ or VD- = 3.3V (See Figure 4) VDD = 3.6V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = 0V to 400mV (See Figure 4) VDD = 3.6V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = Voltage at max RON over signal range of 0V to 400mV, (Note 14) VDD = 3.6V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = 0V to 400mV, (Note 13) VDD = 3.6V, IN = 0V, CTRL = 3.6V, VCOM- or VCOM+ = 0.5V, 0V, VD+ or VD- = 0V, 0.5V, VL and VR = float VDD = 3.3V, IN = 3.3V, CTRL = 0V or 3.3V, VD+ or VD- = 2.0V, VCOM-,VCOM+, VL and VR = float
USB Switches (D+, D-) Analog Signal Range, VANALOG ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON rON Matching Between Channels, rON rON Flatness, RFLAT(ON) Full +25 +25 +25 +25 Full 25 Full 25 Full 25 Full 25 Full 25 Full 25 25 25 25 0 -10 -70 -30 -300 17.7 19.5 26 23.5 4.6 0.06 0.4 8 67 48 18 50 VDD 30 35 5 6.5 0.5 0.55 0.6 1.0 10 70 30 300 V nA nA nA nA ns ns ns ps
OFF Leakage Current, ID+(OFF) or ID-(OFF) ON Leakage Current, IDx
DYNAMIC CHARACTERISTICS Turn-ON Time, tON Turn-OFF Time, tOFF Break-Before-Make Time Delay, tD Skew, tSKEW VDD = 2.7V, RL = 50, CL = 10pF, (See Figure 1) VDD = 2.7V, RL = 50, CL = 10pF, (See Figure 1) VDD = 2.7V, RL = 50, CL = 10pF, (See Figure 2) VDD = 3.3V, IN = 3.3V, CTRL = 0V or 3.3V, RL = 45, CL = 10pF, tR = tF = 750ps at 480Mbps, (Duty Cycle = 50%) (See Figure 7) VDD = 3.3V, IN = 3.3V, CTRL = 0V or 3.3V, RL = 45, CL = 10pF, tR = tF = 750ps at 480Mbps VDD = 3.3V, IN = 3.3V, CTRL = 0V or 3.3V, RL = 45, CL = 10pF, (See Figure 7) VDD = 3.3V, IN = 0V, CTRL = 3.3V, RL = 32, f = 20Hz to 20kHz, VR or VL = 0.707VRMS (2VP-P), (See Figure 6) f = 20Hz to 20kHz, VDD = 3.0V, IN = 0V, CTRL = 3V, VL or VR = 0.707VRMS (2VP-P), RL = 32 Signal = 0dBm, 0.2VDC offset, RL = 50, CL = 5pF f = 1MHz, VDD = 3.3V, IN = 0V, CTRL = 3.3V, VD- or VD+ = VCOMx = 0V, (See Figure 5)
Total Jitter, tJ Propagation Delay, tPD Crosstalk (Channel-to-Channel), R to COM-, L to COM+ Total Harmonic Distortion USB Switch -3dB Bandwidth D+/D- OFF Capacitance, CD+(OFF), CD-(OFF)
25 25 25
-
210 250 -110
-
ps ps dB
25 25 25
-
0.06 630 6
-
% MHz pF
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Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.3V, GND = 0V, VINH = 1.4V,
VINL = 0.5V, VCTRLH = 1.4V, VCTRLL = 0.5V, (Note 11), unless otherwise specified. Boldface limits apply over the operating temperature range, -40C to +85C. (Continued) TEMP MIN MAX (C) (Notes 12, 15) TYP (Notes 12, 15) UNITS 25 25 9 10 pF pF
PARAMETER L/R OFF Capacitance, CLOFF, CROFF COM ON Capacitance, CCOM-(ON), CCOM+(ON) Power Supply Range, VDD Positive Supply Current, IDD Positive Supply Current, IDD Positive Supply Current, IDD Positive Supply Current, IDD (Low Power State)
TEST CONDITIONS f = 1MHz, VDD = 3.3V, IN = 0V, CTRL = 0V or 3.3V, VL or VR = VCOMx = 0V, (See Figure 5) f = 1MHz, VDD = 3.3V, IN = 3.0V, CTRL = 0V or 3.3V, VD- or VD+ = VCOMx = 0V, (See Figure 5)
POWER SUPPLY CHARACTERISTICS Full VDD = 3.6V, IN = 0V or 3.6V, CTRL = 3.6V VDD = 4.2V, IN = 0V or 4.2V, CTRL = 4.2V VDD = 5.0V, IN = 0V or 5.0V, CTRL = 5.0V VDD = 3.6V, IN = 0V, CTRL = 0V or float 25 Full 25 25 25 Full Full Full Full Full Full Full 2.5 1.4 -50 -50 -2 6 6 8 4 150 20 20 1.1 4 5.5 8 10 25 0.5 50 50 2 V A A A A nA nA V V nA nA A M
DIGITAL INPUT CHARACTERISTICS Voltage Low, VINL, VCTRLL VDD = 2.7V to 3.6V Voltage High, VINH, VCTRLH Input Current, IINH Input Current, ICTRLH CTRL Pull-Down Resistor, RCTRL NOTES: 11. VLOGIC = Input voltage to perform proper function. 12. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. 13. Flatness is defined as the difference between maximum and minimum value of ON-resistance over the specified analog signal range. 14. RON matching between channels is calculated by subtracting the channel with the highest max rON value from the channel with lowest max RON value, between L and R or between D+ and D-. 15. Parameters with MIN and/or MAX limits are 100% tested at +25C, unless otherwise specified. Temperature limits established by characterization and are not production tested. VDD = 2.7V to 3.6V
Input Current, IINL, ICTRLL VDD = 3.6V, IN = 0V, CTRL = 0V VDD = 3.6V, IN = 3.6V, CTRL = 0V VDD = 3.6V, IN = 0V, CTRL = 3.6V VDD = 3.6V, IN = 0V, CTRL = 3.6V
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Test Circuits and Waveforms
VDD LOGIC INPUT 50% 0V tOFF SWITCH INPUT VINPUT SWITCH OUTPUT VOUT 90% 0V tON 90% tr <20ns tf <20ns VDD C
CTRL VINPUT AUDIO or USB SWITCH INPUT IN VIN GND
VOUT COMx
RL 50
CL 10pF
Logic input waveform is inverted for switches that have the opposite logic sense.
Repeat test for all switches. CL includes fixture and stray capacitance. RL ----------------------V OUT = V (INPUT) R + r L ON FIGURE 1B. TEST CIRCUIT
FIGURE 1A. MEASUREMENT POINTS FIGURE 1. SWITCHING TIMES
VDD VDD 0V VINPUT VOUT SWITCH OUTPUT 0V tD 90% CTRL D- or D+ L or R IN VIN GND
C
LOGIC INPUT
COMx
VOUT RL 50 CL 10pF
FIGURE 2A. MEASUREMENT POINTS
Repeat test for all switches. CL includes fixture and stray capacitance. FIGURE 2B. TEST CIRCUIT
FIGURE 2. BREAK-BEFORE-MAKE TIME
VDD C VDD C
RON = V1/100mA
CTRL L OR R
RON = V1/40mA
CTRL D- OR D+
VL OR R V1 100mA COMx GND IN 0V
VD- OR D+ V1 40mA COMx GND IN VDD
Repeat test for all switches.
Repeat test for all switches.
FIGURE 3. AUDIO RON TEST CIRCUIT
FIGURE 4. USB RON TEST CIRCUIT
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Test Circuits and Waveforms (Continued)
VDD C VDD C
CTRL AUDIO OR USB SIGNAL GENERATOR
CTRL L OR R COMx 32
IN IMPEDANCE ANALYZER COMx GND ANALYZER RL Repeat test for all switches. 0V or VDD 0V
IN
COMx GND
R OR L
NC
Signal direction through switch is reversed, worst case values are recorded. Repeat test for all switches.
FIGURE 5. CAPACITANCE TEST CIRCUIT
FIGURE 6. AUDIO CROSSTALK TEST CIRCUIT
tri 90% DIN+ DIN10% 50% tskew_i 90% 50% 10% tfi tro 90% OUT+ OUT10% 50% tskew_o 90% tf0 50% 10% DINDIN+ 143 15.8 143 VDD 15.8
VDD
C
CTRL IN COM+ D+ CL COMDCL OUT+ 45 OUT45
GND |tro - tri| Delay Due to Switch for Rising Input and Rising Outpu |tfo - tfi| Delay Due to Switch for Falling Input and Falling Outpu |tskew_0| Change in Skew through the Switch for Output Signa |tskew_i| Change in Skew through the Switch for Input Signals
FIGURE 7A. MEASUREMENT POINTS FIGURE 7. SKEW TEST
FIGURE 7B. TEST CIRCUIT
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Application Block Diagrams
VDD CONTROLLER USB AND HEADPHONE JACK ISL54206A VBUS IN LOGIC 4M COMDD+ 50k L R CODEC 50k CTRL USB HIGH-SPEED TRANSCEIVER
COM+
GND LOGIC CONTROL VIA MICRO-PROCESSOR
VDD USB AND HEADPHONE JACK ISL54206A LOGIC 4M DD+ 50k L R CODEC 50k CONTROLLER CTRL USB HIGH-SPEED TRANSCEIVER
VBUS 22k
IN 4M COM-
COM+
GND LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB
Detailed Description
The ISL54206A device is a dual single pole/double throw (SPDT) analog switch device that can operate from a single DC power supply in the range of 2.5V to 5.5V. It was designed to function as a dual 2 to 1 multiplexer to select between USB differential data signals and audio L and R stereo signals. It comes in tiny TQFN and TDFN packages for use in MP3 players, PDAs, cell phones, and other personal media players. The part consists of two 3 audio switches and two 5 USB switches. The audio switches can accept signals that swing below ground. They were designed to pass audio left and right stereo signals, that are ground referenced, with minimal distortion. The USB switches were designed to pass high-speed USB differential data signals with minimal edge and phase distortion.
The ISL54206A was specifically designed for MP3 players, cell phones and other personal media player applications that need to combine the audio headphone jack and the USB data connector into a single shared connector, thereby saving space and component cost. Typical application block diagrams of this functionality is shown above. The ISL54206A has a single logic control pin (IN) that selects between the audio switches and the USB switches. This pin can be driven Low or High to switch between the audio CODEC drivers and USB transceiver of the MP3 player or cellphone. The ISL54206A also contains a logic control pin (CTRL) that when driven Low while IN is Low, opens all switches and puts the part into a low power state, drawing typically 1nA of IDD current. A detailed description of the two types of switches is provided in the following sections. The USB transmission
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and audio playback are intended to be mutually exclusive operations. Note: Whenever the USB switches are ON, the audio drivers of the CODEC need to be at AC or DC ground or floating to keep from interfering with the data transmission.
Audio Switches
The two audio switches (L, R) are 3 switches that can pass signals that swing below ground by as much as 1.5V. They were designed to pass ground reference stereo signals with minimal insertion loss and very low distortion. Crosstalk between the audio switches over the audio band is < -110dB. Over a signal range of 1V (0.707VRMS) with VDD >2.7V, these switches have an extremely low RON resistance variation. They can pass ground referenced audio signals with very low distortion (<0.06% THD+N) when delivering 15.6mW into a 32 headphone speaker load. See Figures 8, Figures 9, Figures 10, and Figures 11 THD+N performance curves. These switches are uni-directional switches. The audio drivers should be connected at the L and R side of the switch (pin 7 and pin 8) and the speaker loads should be connected at the COM side of the switch (pin 3 and pin 4). The audio switches are active (turned ON) whenever the IN voltage is 0.5V and the CTRL voltage to 1.4V. Note: Whenever the audio switches are ON, the USB transceivers need to be in the high impedance state or static high or low state.
USB Switch Cell Off-Isolation
Due to the unique internal architecture of the ISL54206A part, the USB switch cell has limited offisolation to a negative signal at the COM side of the part. When driving an audio signal into the L and R inputs a small negative voltage will appear at the D- and D+ lines as the audio signal transitions below ground. With a USB transceiver connected at the D-/D+ pins and with a 32W headphone connected at the COM pins Table 1 shows the negative voltage generated at the D-/D+ lines as you increase the audio amplitude across the headphone load.
TABLE 1. AUDIO SIGNAL AMPLITUDE 800mVP-P 880mVP-P 1.08VP-P 2VP-P 2.25VP-P 4VP-P D-/D+ VOLTAGE (V) +25C -0.22 -0.24 -0.3 -0.41 -0.47 -0.83 +85C -0.27 -0.3 -0.34 -0.44 -0.5 -0.85
USB Switches
The two USB switches (D+, D-) are bidirectional switches that can pass rail-to-rail signals. When powered with a 3.6V supply, these switches have a nominal rON of 4.6 over the signal range of 0V to 400mV with a rON flatness of 0.4. The rON matching between the D+ and Dswitches over this signal range is only 0.06 ensuring minimal impact by the switches to USB high speed signal transitions. As the signal level increases, the rON resistance increases. At signal level of 3.3V the switch resistance is nominally 23. The USB switches were specifically designed to pass USB 2.0 high-speed (480Mbps) differential signals typically in the range of 0V to 400mV. They have low capacitance and high bandwidth to pass the USB high-speed signals with minimum edge and phase distortion to meet USB 2.0 high speed signal quality specifications. See high-speed eye diagram Figure 15. The USB switches can also pass USB full-speed signals (12Mbps) with minimal distortion and meet all the USB requirements for USB 2.0 full-speed signaling. See the full-speed eye diagrams, Figures 12 thru 14. The maximum signal range for the USB switches is from -1.5V to VDD. The signal voltage at D- and D+ should not be allowed to exceed the VDD voltage rail or go below ground by more than -1.5V. The USB switches are active (turned ON) whenever the IN voltage is 1.4V.
The USB specification (USB Specification Rev 2.0, Chapter 7, Section 7.1.1) states that a USB transceiver must be able to tolerate a -1V signal at its D-/D+ differential inputs. The data in the table shows that the -1V level is never exceeded during audio operation and should have no impact on the long-term reliability of the USB transceiver.
ISL54206A Operation
The following discussion discusses using the ISL54206A in the typical application shown in the block diagrams on page 9. VDD SUPPLY The DC power supply connected at VDD (pin 1) provides the required bias voltage for proper switch operation. The part can operate with a supply voltage in the range of 2.5V to 5.5V. In a typical USB/Audio application for portable battery powered devices, the VDD voltage will come from a battery or an LDO and be in the range of 2.7V to 3.6V. For best possible USB full-speed operation (12Mbps), it is recommended that the VDD voltage be 2.5V in order to get a USB data signal level above 2.5V.
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ISL54206A
LOGIC CONTROL The state of the ISL54206A device is determined by the voltage at the IN pin (pin 2) and the CTRL pin (pin 10). Refer to "Truth Table" on page 2. These logic pins are 1.8V logic compatible when VDD is in the range of 2.7V to 3.6V and can be controlled by a standard processor. The CTRL pin is internally pulled low through a 4M resistor to ground and can be left floating or tri-stated by the processor. The CTRL control pin is only active when IN is logic "0". The IN pin does not have an internal pull-down resistor and must not be allowed to float. It must be driven High or Low. The voltage at the IN pin can exceed the VDD voltage by as much as 2.55V. This allows the VBUS voltage from a computer or USB hub (4.4V to 5.25V) to drive the IN pin while the VDD voltage is in the range of 2.7V to 3.6V. An external pull-down resistor is required from the IN pin to ground when directly driving the IN pin with the computer VBUS voltage. See "USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE "IN" PIN" on page 11. Logic Control Voltage Levels IN = Logic "0" (Low) when IN 0.5V IN = Logic "1" (High) when IN 1.4V CTRL = Logic "0" (Low) when 0.5V or floating. CTRL = Logic "1" (High) when 1.4V Audio Mode If the IN pin = Logic "0" and CTRL pin = Logic "1," the part will be in the Audio mode. In Audio mode, the L (left) and R (right) 3 audio switches are ON and the D- and D+ 5 USB switches are OFF (high impedance). When nothing is plugged into the common connector or a headphone is plugged into the common connector, the processor will sense that there is no voltage at the VBUS pin of the connector and will drive and hold the IN control pin of the ISL54206A low. As long as the CTRL = Logic "1," the ISL54206A part will be in the audio mode and the audio drivers of the media player can drive the headphones and play music. USB Mode If the IN pin = Logic "1" and CTRL pin = Logic "0" or Logic "1" the part will go into USB mode. In USB mode, the D- and D+ 5 switches are ON and the L and R 3 audio switches are OFF (high impedance). When a USB cable from a computer or USB hub is connected at the common connector, the processor will sense the presence of the 5V VBUS and drive the IN pin voltage high. The ISL54206A part will go into the USB mode. In USB mode, the computer or USB hub transceiver and the MP3 player or cell phone USB transceiver are connected and digital data will be able to be transmitted back and forth. When the USB cable is disconnected, the processor will sense that the 5V VBUS voltage is no longer connected and will drive the IN pin low and put the part back into the Audio or Low Power Mode. Low Power Mode If the IN pin = Logic "0" and CTRL pin = Logic "0," the part will be in the Low Power mode. In the Low Power mode, the audio switches and the USB switches are OFF (high impedance). In this state, the device draws typically 1nA of current. USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE "IN" PIN External IN Pull-Down Resistor Rather than using a microprocessor to control the IN logic pin you can directly drive the IN pin using the VBUS voltage from the computer or USB hub. In order to do this, you must connect an external resistor from the IN pin to ground. When a headphone or nothing is connected at the common connector, the external pull-down will pull the IN pin low putting the ISL54206A in the Audio mode or Low Power mode depending on the condition of the CTRL pin. When a USB cable is connected at the common connector, the voltage at the IN pin will be driven to 5V and the part will automatically go into the USB mode. When the USB cable is disconnected from the common connector, the voltage at the IN pin will be pulled low by the pull-down resistor and return to the Audio Mode or Low Power Mode depending on the condition of the CTRL pin. Note: The voltage at the IN pin can exceed the VDD voltage by as much as 2.55V. This allows the VBUS voltage from a computer or USB hub (4.4V to 5.25V) to drive the IN pin while the VDD voltage is in the range of 2.7V to 3.6V. External IN Series Resistor The ISL54206A contains a clamp circuit between IN and VDD. Whenever the IN voltage is greater than the VDD voltage by more than 2.55V, current will flow through this clamp circuitry into the VDD power supply bus. During normal USB operation, VDD is in the range of 2.7V to 3.6V and IN (VBUS voltage from computer or USB hub) is in the range of 4.4V to 5.25V, the clamp circuit is not active and no current will flow through the clamp into the VDD supply. In a USB application, the situation can exist where the VBUS voltage from the computer could be applied at the IN pin before the VDD voltage is up to its normal operating voltage range and current will flow through the clamp into the VDD power supply bus. This current could be quite high when VDD is OFF or at 0V and could potentially damage other components connected in the circuit. In the application circuit, a 22k resistor has been put in series with the IN pin to limit the current to a safe level during this situation.
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ISL54206A
It is recommended that a current limiting resistor in the range of 10k to 50k be connected in series with the IN pin. It will have minimal impact on the logic level at the IN pin during normal USB operation and protect the circuit during the time VBUS is present before VDD is up to its normal operating voltage. Note: No external resistor is required in applications where the voltage at the IN pin will not exceed VDD by more than 2.55V.
Typical Performance Curves
0.11 0.10 0.09 THD+N (%) 0.08 0.07 VDD = 2.7V 0.06 0.05 0.04 20 VDD = 3V RLOAD = 32 VLOAD = 0.707VRMS
TA = +25C, Unless Otherwise Specified
0.4 RLOAD = 32 VDD = 3V 0.3 THD+N (%) 3VP-P
VDD = 2.6V
0.2 2.5VP-P 0.1 2VP-P 1VP-P 20 200 2k FREQUENCY (Hz) 20k
VDD = 3.6V
200 2k FREQUENCY (Hz)
20k
0
FIGURE 8. THD+N vs SUPPLY VOLTAGE vs FREQUENCY
FIGURE 9. THD+N vs SIGNAL LEVELS vs FREQUENCY
0.5 RLOAD = 32 FREQ = 1kHz VDD = 3V
0.5 RLOAD = 32 FREQ = 1kHz VDD = 3V
0.4 THD+N (%)
0.4
0.3
THD+N (%)
0.3
0.2
0.2
0.1
0.1
0
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
0
0
10
20
30
40
50
OUTPUT VOLTAGE (VP-P)
OUTPUT POWER (mW)
FIGURE 10. THD+N vs OUTPUT VOLTAGE
FIGURE 11. THD+N vs OUTPUT POWER
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ISL54206A
Typical Performance Curves
TA = +25C, Unless Otherwise Specified (Continued)
VDD = 5.5V
VOLTAGE SCALE (0.5V/DIV)
TIME SCALE (10ns/DIV)
FIGURE 12. EYE PATTERN: 12MBps WITH SWITCHES IN THE SIGNAL PATH
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FN6515.2 September 30, 2010
ISL54206A
Typical Performance Curves
TA = +25C, Unless Otherwise Specified (Continued)
VDD = 3.3V
VOLTAGE SCALE (0.5V/DIV)
TIME SCALE (10ns/DIV)
FIGURE 13. EYE PATTERN: 12MBps WITH SWITCHES IN THE SIGNAL PATH
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FN6515.2 September 30, 2010
ISL54206A
Typical Performance Curves
TA = +25C, Unless Otherwise Specified (Continued)
VDD = 2.5V
VOLTAGE SCALE (0.5V/DIV)
TIME SCALE (10ns/DIV)
FIGURE 14. EYE PATTERN: 12MBps WITH SWITCHES IN THE SIGNAL PATH
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FN6515.2 September 30, 2010
ISL54206A
Typical Performance Curves
TA = +25C, Unless Otherwise Specified (Continued)
VDD = 3.3V VDD = 3.3V
VOLTAGE SCALE (0.1V/DIV)
TIME SCALE (0.2ns/DIV.)
FIGURE 15. EYE PATTERN: 480MBps USB SIGNAL WITH SWITCHES IN THE SIGNAL PATH
1 0 NORMALIZED GAIN (dB) -1 -2 -3 -4 USB SWITCH
Die Characteristics
SUBSTRATE AND TDFN THERMAL PAD POTENTIAL (POWERED UP): GND TRANSISTOR COUNT: 98 PROCESS: Submicron CMOS
RL = 50 VIN = 0.2VP-P to 2VP-P 1M 10M 100M FREQUENCY (Hz) 1G
FIGURE 16. FREQUENCY RESPONSE
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FN6515.2 September 30, 2010
ISL54206A
Revision History
The revision history provided is for informational purposes only and is believed to be accurate, but not warranted. Please go to web to make sure you have the latest Rev. DATE 09/24/2010 06/15/2010 REVISION FN6515.2 FN6515.1 CHANGE Added section titled "USB Switch Cell Off-Isolation" to page 10. On page 1: Added "The L and R 50k resistors to ground are not shown." to "Application Block Diagram". Removed (2) 50k resistors, which were tied to L and R next to "CODEC" block Updated Pb-free bullet in "Features" On page 2: Added PD to "Pin Descriptions" table Updated Pb-free notes in "Ordering Information" per new verbiage based on lead finish. Added TB347 link to ordering information for reel specifications. On page 4: Added Latch up to Abs Max Ratings Added Theta JC to "Thermal Information". Changed 10 Ld TQFN Theta JA from 130 to 145. Changed 10 Ld TDFN Theta JA from 110 to 55. Added applicable Theta JC notes. Added standard over temp note to common conditions of spec table (Boldface limits apply..) On page 5: Changed "ON Leakage Current, IDx" room temp and full temp limits from: Room temp MIN/TYP/MAX: from -10/2/10nA to -30/8/30nA Full temp MIN/MAX: from -75/75nA to -300/300nA On page 6: Changed "Positive Supply Current, IDD (Low Power State)" room temp and full temp limits from: Room temp TYP/MAX: from 1/7nA to 4/25nA Full temp: removed MAX of 140nA. Added TYP of 150nA On page 4 to page 6: Updated standard over-temp Note 15 in MIN/MAX columns of the Electrical Specifications table. On page 18: Updated POD L10.2.1X1.6A to most recent revision. Changes were: Convert to new format by moving dimensions from table onto drawing Corrected leadframe thickness in Detail x from 0.2 REF to 0.125 REF Corrected Note 4 to read "...between 0.15mm and 0.30mm...", it previously read "...between .015mm and 0.30mm..." Corrected the word "indentifier" in Note 8 to read "identifier". On page 19: Updated POD L10.3x3A to most recent revision. Changes were to add Typical Recommended Land Pattern & convert to new format by moving dimensions from table onto drawing (no dimension changes) Initial Release.
06/25/2007
FN6515.0
Products
Intersil Corporation is a leader in the design and manufacture of high-performance analog semiconductors. The Company's products address some of the industry's fastest growing markets, such as, flat panel displays, cell phones, handheld products, and notebooks. Intersil's product families address power management and analog signal processing functions. Go to www.intersil.com/products for a complete list of Intersil product families. *For a complete listing of Applications, Related Documentation and Related Parts, please see the respective device information page on intersil.com: ISL54206A To report errors or suggestions for this datasheet, please go to www.intersil.com/askourstaff FITs are available from our website at http://rel.intersil.com/reports/search.php For additional products, see www.intersil.com/product_tree Intersil products are manufactured, assembled and tested utilizing ISO9000 quality systems as noted in the quality certifications found at www.intersil.com/design/quality
Intersil products are sold by description only. Intersil Corporation reserves the right to make changes in circuit design, software and/or specifications at any time without notice. Accordingly, the reader is cautioned to verify that data sheets are current before placing orders. Information furnished by Intersil is believed to be accurate and reliable. However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries.
For information regarding Intersil Corporation and its products, see www.intersil.com 17
FN6515.2 September 30, 2010
ISL54206A
Package Outline Drawing
L10.2.1x1.6A
10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE Rev 5, 3/10
8. PIN 1 INDEX AREA 2.10 B 1 A PIN #1 ID 8. 0.10 MIN. 1.60 10 1 0.05 MIN.
4 4X 0.20 MIN.
5
0.80 0.10 2X TOP VIEW BOTTOM VIEW 9 6X 0.50 6 10 X 0.20 4 0.10 M C A B MC SEE DETAIL "X" PACKAGE OUTLINE MAX. 0.55 0.10 C C (0.10 MIN.) (2.00) SIDE VIEW (1.30) SEATING PLANE 0.08 C 10X 0.40
(10 X 0.20)
(0.05 MIN) 1
(10X 0.60)
(0.80)
C (6X 0.50 ) (2.50)
0 . 125 REF
0-0.05 TYPICAL RECOMMENDED LAND PATTERN DETAIL "X"
NOTES: 1. 2. 3. 4. Dimensioning and tolerancing conform to ASME Y14.5M-1994. All Dimensions are in millimeters. Angles are in degrees. Dimensions in ( ) for Reference Only. Unless otherwise specified, tolerance : Decimal 0.05 Lead width dimension applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. Maximum package warpage is 0.05mm. Maximum allowable burrs is 0.076mm in all directions. Same as JEDEC MO-255UABD except: No lead-pull-back, MIN. Package thickness = 0.45 not 0.50mm Lead Length dim. = 0.45mm max. not 0.42mm. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature.
5. 6. 7.
8.
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FN6515.2 September 30, 2010
ISL54206A
Package Outline Drawing
L10.3x3A
10 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE Rev 5, 3/10
3.00 A 6 PIN 1 INDEX AREA 6 PIN 1 INDEX AREA 1 2.0 REF 8X 0.50 BSC 5 10X 0 . 30
B
3.00
1.50
0.15
(4X) 10 5
0.10 M C A B 0.05 M C 4 10 X 0.25
TOP VIEW 2.30 ( 2.30 ) BOTTOM VIEW
0 .80 MAX
SEE DETAIL "X" 0.10 C C
(2.90)
(1.50) SIDE VIEW (10 X 0.50) 0 . 2 REF
SEATING PLANE 0.08 C
5
( 8X 0 .50 ) ( 10X 0.25 ) TYPICAL RECOMMENDED LAND PATTERN NOTES: 1. 2. 3. 4.
C
0 . 00 MIN. 0 . 05 MAX. DETAIL "X"
Dimensions are in millimeters. Dimensions in ( ) for Reference Only. Dimensioning and tolerancing conform to ASME Y14.5m-1994. Unless otherwise specified, tolerance : Decimal 0.05 Angular 2.50 Dimension applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip.
5. 6.
Tiebar shown (if present) is a non-functional feature. The configuration of the pin #1 identifier is optional, but must be located within the zone indicated. The pin #1 identifier may be either a mold or mark feature.
7.
Compliant to JEDEC MO-229-WEED-3 except exposed pad length (2.30mm).
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FN6515.2 September 30, 2010

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