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ISL54209
Data Sheet December 20, 2007 FN6627.0
MP3/USB 2.0 High Speed Switch with Negative Signal Handling and Low Power Shutdown
The Intersil ISL54209 dual SPDT (Single Pole/Double Throw) switch combines low distortion audio and accurate USB 2.0 high speed data (480Mbps) signal switching in the same low voltage device. When operated with a 2.5V to 5.0V single supply, this analog switch allows 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 ISL54209 logic control pins are 1.8V compatible, which allows for control via a standard controller. With a VDD voltage in the range of 2.5V to 3.6V, the IN pin voltage can exceed the VDD rail allowing 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 ISL54209 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.
Features
* High Speed (480Mbps) and Full Speed (12Mbps) Signaling Capability per USB 2.0 * Low Distortion Negative Signal Capability * Low Power Shutdown State * Low Distortion Headphone Audio Signals - THD+N at 20mW into 32 Load . . . . . . . . . . . . <0.07% * Crosstalk (100kHz) . . . . . . . . . . . . . . . . . . . . . . . . . -95dB * OFF Isolation (100kHz) . . . . . . . . . . . . . . . . . . . . . . 95dB * Single Supply Operation (VDD) . . . . . . . . . . . . 2.5V to 5.0V * -3dB Bandwidth USB Switch . . . . . . . . . . . . . . . . . 736MHz * Available in TQFN and TDFN Packages * Compliant with USB 2.0 Short Circuit Requirements Without Additional External Components * Pb-Free (RoHS Compliant)
Applications
* MP3 and other Personal Media Players * Cellular/Mobile Phones * PDAs * Audio/USB Switching
Related Literature
* Technical Brief TB363 "Guidelines for Handling and Processing Moisture Sensitive Surface Mount Devices (SMDs)"
Application Block Diagram
3.3V
IN USB/HEADPHONE JACK VBUS 4M
VDD ISL54209 LOGIC CONTROL
CTRL 4M D-
CONTROLLER
COM D+ COM + L R 50k GND 50k
USB HIGH-SPEED TRANSCEIVER
AUDIO CODEC
1
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. All Rights Reserved All other trademarks mentioned are the property of their respective owners.
ISL54209 Pinouts
(Note 1) ISL54209 (10 Ld 2.1mmx1.6mm TQFN) TOP VIEW
CTRL
ISL54209 (10Ld 3.0mmx3.0mm TDFN) TOP VIEW
10 4M VDD IN COM LOGIC CONTROL 9 D8 D+ 4M 3 50k COM + 4 50k 5 GND 6R GND 5 50k 7L COM + 4 50k 6 R 7 L VDD IN COM 1 2 4M 3 8 D+ LOGIC CONTROL 4M 10 CTRL 9 D-
1 2
NOTE: 1. ISL54209 Switches Shown for IN = Logic "0" and CTRL = Logic "1".
Truth Table
ISL54209 IN 0 0 1 CTRL 0 1 X L, R OFF ON OFF D+, DOFF OFF ON
Ordering Information
PART NUMBER PART MARKING TEMP. RANGE (C) PACKAGE PKG. DWG. #
ISL54209IRUZ-T GF (Notes 2, 3) ISL54209IRTZ-T 4209 (Notes 2, 3) ISL54209IRTZ (Note 2) NOTES: 4209
-40 to +85 10 Ld TQFN L10.2.1x1.6A -40 to +85 10 Ld TDFN -40 to +85 10 Ld TDFN L10.3x3A L10.3x3A
IN, CTRL: Logic "0" when 0.5V or Floating, Logic "1" when 1.4V with 2.7V to 3.6V Supply.
Pin Descriptions
PIN NUMBER 1 2 3 4 5 6 7 8 9 10 NAME VDD IN COMCOM+ GND R L D+ DCTRL Power Supply Digital Control Input Voice and Data Common Pin Voice and Data Common Pin Ground Connection Audio Right Input Audio Left Input USB Differential Input USB Differential Input Digital Control Input (Audio Enable) FUNCTION
2. These Intersil Pb-free plastic packaged products employ special Pbfree 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. 3. Please refer to TB347 for details on reel specifications.
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ISL54209
Absolute Maximum Ratings
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to 5.5V Input Voltages D+, D-, L, R (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . . - 2V to 5.5V L, R (Note 4) . . . . . . . . . . . . . . . . . . . . . . . - 2V to ((VDD) + 0.3V) IN (Note 4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V CTRL (Note 4) . . . . . . . . . . . . . . . . . . . . . -0.3V to ((VDD) + 0.3V) Output Voltages COM-, COM+ (Note 4) . . . . . . . . . . . . . . . . . . . . . . . . -2V to 5.5V 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 Ratings Human Body Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >2kV Machine Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . >200V Charged Device Model . . . . . . . . . . . . . . . . . . . . . . . . . . . .>1.5kV
Thermal Information
Thermal Resistance (Typical, Notes 5 and 6)JA (C/W) JC (C/W) 10 Ld 2.1mmx1.6mm TQFN Package 154 48.3 10 Ld 3mmx3mm TDFN . . . . . . . . . . . 89 25 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: 4. Signals on D+, D-, L, R, COM-, COM+, CTRL and IN exceeding VDD or GND by specified amount are clamped. Limit current to maximum current ratings. 5. 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. 6. 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 = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL = 0.5V,
(Note 7), Unless Otherwise Specified. PARAMETER ANALOG SWITCH CHARACTERISTICS Audio Switches (L, R) Analog Signal Range, VANALOG VDD = 3.3V, IN = 0.5V, CTRL = 1.4V ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON 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, Note 11) 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 (Notes 11 and 12) VDD = 3.0V, IN = 0.5V, CTRL = 1.4V , ICOMx = 40mA, VL or VR = -0.85V to 0.85V (Notes 10 and 11) VDD = 3.6V, IN = 0V, CTRL = 1.4V , 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. Full 25 25 25 +25 Full +25 Full +25 Full +25 -1.5 2.3 2.35 2.72 2.5 0.09 0.02 50 1.5 2.8 3.4 0.25 0.26 0.05 0.07 V k TEST CONDITIONS TEMP (C) MIN (Notes 8, 9) TYP MAX (Notes 8, 9) UNITS
rON Matching Between Channels, rON rON Flatness, rFLAT(ON)
Discharge Pull-Down Resistance, RL, RR
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ISL54209
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL = 0.5V,
(Note 7), Unless Otherwise Specified. (Continued) PARAMETER USB Switches (D+, D-) Analog Signal Range, VANALOG VDD = 2.7V to 3.6V, IN = 1.4V, CTRL = 1.4V ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON ON-Resistance, rON 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, Note 11) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = 0V to 400mV (see Figure 4, Note 11) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = Voltage at max rON (Notes 11 and 12) VDD = 3.3V, IN = 1.4V, CTRL = 1.4V, ICOMx = 40mA, VD+ or VD- = 0V to 400mV (Notes 10 and 11) 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 = 3.6V, IN = VDD, CTRL = 0V or VDD, VD+ or VD- = 2.7V, VCOM- or VCOM+ = Float, VL and VR = float Full +25 25 25 25 Full 25 Full 25 Full 25 Full 25 Full 25 Full 0 -5 -60 -10 -70 20 22 28 25 5 0.05 0.45 0.5 2 VDD 30 35 6.5 7 0.25 0.55 0.55 1.0 5 60 10 70 V nA nA nA nA TEST CONDITIONS TEMP (C) MIN (Notes 8, 9) TYP MAX (Notes 8, 9) UNITS
ON-Resistance, rON
rON Matching Between Channels, rON rON Flatness, rFLAT(ON)
OFF-Leakage Current, ID+(OFF) or ID-(OFF) ON-Leakage Current, IDX
DYNAMIC CHARACTERISTICS USB Turn-ON Time, tON USB Turn-OFF Time, tOFF Audio Turn-ON Time, tON Audio Turn-OFF Time, tOFF VDD = 3.0V, RL = 50, CL = 10pF (see Figure 1) VDD = 3.0V, RL = 50, CL = 10pF (see Figure 1) VDD = 3.0V, RL = 50, CL = 10pF (see Figure 1) VDD = 3.0V, RL = 50, CL = 10pF (see Figure 1) 25 25 25 25 25 25 52 20 2.5 50 44 50 ns ns s ns ns ps
Break-Before-Make Time Delay, VDD = 3.0V, RL = 50, CL = 10pF (see Figure 2) tD Skew, tSKEW VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45, CL = 10pF, tR = tF = 720ps at 480Mbps, (Duty Cycle = 50%) (see Figure 7) VDD =3.0V, IN = 3V, CTRL = 3V, RL = 50, CL = 10pF, tR = tF = 750ps at 480Mbps VDD = 3.0V, IN = 3V, CTRL = 3V, RL = 45, CL = 10pF (see Figure 7) VDD = 3.0V, IN = 0V, CTRL = 3.0V, RL = 32, f = 20Hz to 20kHz, VR or VL = 0.707VRMS (2VP-P) (see Figure 6) VDD = 3.0V, RL = 50, f = 100kHz (see Figure 6) VDD = 3.0V, RL = 50, f = 100kHz VDD = 3.0V, RL = 32, f = 20Hz to 20kHz f = 20Hz to 20kHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VL or VR = 0.707VRMS (2VP-P), RL = 32 Signal = 0dBm, 0.2VDC offset, RL = 50, CL = 5pF f = 1MHz, VDD = 3.0V, IN = 0V, CTRL = 3.0V, VD- or VD+ = VCOMx = 0V (see Figure 5)
Total Jitter, tJ Propagation Delay, tPD Audio Crosstalk R to COM-, L to COM+ Crosstalk (Audio to USB, USB to Audio) OFF-Isolation OFF-Isolation Total Harmonic Distortion USB Switch -3dB Bandwidth D+/D- OFF-Capacitance, CDxOFF
25 25 25 25 25 25 25 25 25
-
210 250 -110 -95 95 114 0.06 736 3
-
ps ps dB dB dB dB % MHz pF
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ISL54209
Electrical Specifications - 2.7V to 3.6V Supply Test Conditions: VDD = +3.0V, GND = 0V, VINH = VCTRLH = 1.4V, VINL = VCTRLL = 0.5V,
(Note 7), Unless Otherwise Specified. (Continued) PARAMETER TEST CONDITIONS TEMP (C) 25 25 MIN (Notes 8, 9) TYP 5 8 MAX (Notes 8, 9) UNITS pF pF
L/R OFF-Capacitance, CLOFF, f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VL or CROFF VR = VCOMx = 0V (see Figure 5) COM ON-Capacitance, CCOMx(ON) f = 1MHz, VDD = 3.0V, IN = 3.0V, CTRL = 0V or 3V, VD- or VD+ = VCOMx = 0V (see Figure 5)
POWER SUPPLY CHARACTERISTICS Power Supply Range, VDD Positive Supply Current, IDD VDD = 3.6V, IN = 0V or 3.6V, CTRL = 3.6V Full 25 Full Positive Supply Current, IDD (Low Power State) VDD = 3.6V, IN = 0V, CTRL = 0V or float 25 Full 25 2.5 7 1 7 5.0 13 15 10 150 V A A nA nA A
Power OFF-Current, IDx ICOMx VDD = 0V, VDx = VCOMx = 5.25V, IN = CTRL = Float DIGITAL INPUT CHARACTERISTICS Voltage Low, VINL, VCTRLL Voltage High, VINH, VCTRLH Input Current, IINL, ICTRLL Input Current, IINH Input Current, ICTRLH CTRL Pull-Down Resistor, RCTRL IN Pull-Down Resistor, RIN NOTES: 7. Vlogic = Input voltage to perform proper function. VDD = 2.7V to 3.6V VDD = 2.7V to 3.6V VDD = 3.6V, IN = 0V, CTRL = 0V VDD = 3.6V, IN = 3.6, CTRL = 0V VDD = 3.6V, IN = 0V, CTRL = 3.6V VDD = 3.6V, IN = 0V, CTRL = 3.6V; measure current through the internal pull-down resistor and calculate resistance value. VDD = 3.6V, IN = 3.6V, CTRL = 3.6V; measure current through the internal pull-down resistor and calculate resistance value.
Full Full Full Full Full Full Full
1.4 -50 -2 -2 -
20 0.9 0.9 4 4
0.5 50 2 2 -
V V nA A A M M
8. The algebraic convention, whereby the most negative value is a minimum and the most positive a maximum, is used in this data sheet. 9. Parts are 100% tested at +25C. Over-temperature limits established by characterization and are not production tested. 10. Flatness is defined as the difference between maximum and minimum value of on-resistance over the specified analog signal range. 11. Limits established by characterization and are not production tested. 12. 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-.
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ISL54209 Test Circuits and Waveforms
VINH LOGIC INPUT 50% VINL tOFF SWITCH INPUT VINPUT 90% SWITCH OUTPUT 0V tON VOUT 90% VIN SWITCH INPUT tr < 20ns tf < 20ns VINPUT VDD C
CTRL AUDIO OR USB COMx IN GND RL 50 CL 10pF VOUT
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 L + r ON FIGURE 1B. TEST CIRCUIT
FIGURE 1A. MEASUREMENT POINTS FIGURE 1. SWITCHING TIMES
VDD
C
LOGIC INPUT
VINH VINPUT VINL VOUT 0V
CTRL D- OR D+ L OR R IN 90% tD VIN GND COMx RL 50 VOUT CL 10pF
SWITCH OUTPUT
Repeat test for all switches. CL includes fixture and stray capacitance. FIGURE 2A. MEASUREMENT POINTS FIGURE 2. BREAK-BEFORE-MAKE TIME FIGURE 2B. TEST CIRCUIT
VDD C
VDD C
rON = V1/40mA L OR R VL OR R
CTRL
rON = V1/40mA
CTRL D- OR D+
VD- OR D+ V1 40mA COMx GND IN 0V OR FLOAT 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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ISL54209 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
VDD
C
tri 90% DIN+ DIN10% 50% tskew_i 90% 50% 10% tfi tro 90% OUT+ OUT10% 50% tskew_o 90% tf0 50% 10% DINDIN+ VDD 15.8 143 15.8 143
CTRL IN COM+ D+ CL COMDCL OUT+ 45 OUT45
GND |tro - tri| Delay Due to Switch for Rising Input and Rising Output Signals. |tfo - tfi| Delay Due to Switch for Falling Input and Falling Output Signals. |tskew_0| Change in Skew through the Switch for Output Signals. |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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ISL54209 Application Block Diagrams
3.3V
IN USB/HEADPHONE JACK VBUS 4M
VDD ISL54209 LOGIC CONTROL
CTRL 4M D-
CONTROLLER
COM D+ COM +
USB HIGH-SPEED TRANSCEIVER
L
R 50k GND 50k AUDIO CODEC
FIGURE 8. LOGIC CONTROL VIA MICRO-PROCESSOR
3.3V
IN VBUS USB/HEADPHONE JACK 4M
VDD ISL54209 LOGIC CONTROL
CTRL 4M D-
CONTROLLER
COM D+ COM +
USB HIGH-SPEED TRANSCEIVER
L
R 50k GND 50k AUDIO CODEC
FIGURE 9. LOGIC CONTROL VIA VBUS VOLTAGE FROM COMPUTER OR USB HUB
Detailed Description
The ISL54209 device is a dual single pole/double throw (SPDT) analog switch that operates from a single DC power supply in the range of 2.5V to 5.0V. 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, cellular phones and other personal media players.
The part consists of two 2.5 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 ISL54209 was specifically designed for MP3 players, personal media players and cellular phone applications that need to combine the audio headphone jack and the USB
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8
ISL54209
data connector into a single shared connector, thereby saving space and component cost. Typical Application Block Diagrams of this functionality are shown in Figures 8 and 9. The ISL54209 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 cellular phone. The ISL54209 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 are provided in the following sections. 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 Figure 13 for Full-speed Eye Pattern taken with switch in the signal path. The maximum signal range for the USB switches is from -1.5V to VDD. The signal voltage at D- and D+ should not be allow 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 to 1.4V.
ISL54209 Operation
The following will discuss using the ISL54209 in the Typical Application Block Diagrams shown in Figures 8 and 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 5.0V. 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. LOGIC CONTROL The state of the ISL54209 device is determined by the voltage at the IN pin (pin 2) and the CTRL pin (pin 10). 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 part has three states or modes of operation. The Audio Mode, USB Mode and the Low Power Mode. Refer to the "Truth Table" on page 2. The IN and CTRL pins are 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 voltage at the IN pin can exceed the VDD voltage by as much as 2.55V when VDD 3.6V. 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 2.5V to 3.6V. See "USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE "IN" PIN" page 10 Logic control voltage levels: IN = Logic "0" (Low) when VIN 0.5V or Floating. IN = Logic "1" (High) when VIN 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
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Audio Switches
The two audio switches (L, R) are 2.5 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 over a 1V signal range. Crosstalk between the audio channels is -110dB over the audio band. Crosstalk between the audio channel and USB channel is -95dB at 100kHz. These switches have excellent off-isolation, 114dB, over the audio band with a 32 load. 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 10 and 11. These switches are bi-directional switches. In typical applications, the audio drivers would be connected at the L and R side of the switch (pins 7 and 8) and the speaker loads would be connected at the COM side of the switch (pins 3 and 4). The audio switches are active (turned ON) whenever the IN voltage is 0.5V or floating and the CTRL voltage to 1.4V.
USB Switches
The two USB switches (D+, D-) are bidirectional switches that can pass rail-to-rail signals. When powered with a 3.3V supply, these switches have a nominal rON of 5 over the signal range of 0V to 400mV with a rON flatness of 0.45. The rON matching between the D+ and D- switches over this signal range is only 0.05 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 25. 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 Figure 12. 9
ISL54209
(right) 2.5 audio switches are ON and the D- and D+ 5 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 ISL54209 low. As long as the CTRL = Logic "1," the ISL54209 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 2.5 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 ISL54209 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. In Low Power mode, the off-isolation and crosstalk between switch cells is minimal for negative swinging signals. Care should be taken to avoid negative swinging signals in this mode of operation. In typical applications, the Low Power state will be applied to the ISL54209 part when the portable media player is in its sleep or hibernate mode to conserve battery power. In the sleep mode, no audio or USB signals are applied to the part. USING THE COMPUTER VBUS VOLTAGE TO DRIVE THE "IN" PIN External IN Pull-Down Resistor Rather than using a micro-processor to control the IN logic pin, one can directly drive the IN pin using the VBUS voltage from the computer or USB hub. When a headphone or nothing is connected at the common connector, the internal 4 pull-down will pull the IN pin low putting the ISL54209 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 when VDD 3.6V. 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 2.5V to 3.6V.
10
FN6627.0 December 20, 2007
ISL54209
Typical Performance Curves TA = +25C, Unless Otherwise Specified.
0.11 RLOAD = 32 VLOAD = 0.707VRMS 0.08 2.5VP-P THD+N (%) 0.10 RLOAD = 32 VDD = 3V 3VP-P 0.10
0.09 THD+N (%)
0.08
0.06
0.07
2VP-P
VDD = 2.6V
0.06 VDD = 3.6V 0.05 VDD = 2.7V VDD = 3V
0.04 1VP-P
0.04 20
200 2000 FREQUENCY (Hz)
20000
0.02 20
200 2000 FREQUENCY (Hz)
20000
FIGURE 10. THD+N vs SUPPLY VOLTAGE vs FREQUENCY
FIGURE 11. THD+N vs SIGNAL LEVELS vs FREQUENCY
VOLTAGE SCALE (0.1V/DIV)
TIME SCALE (0.2ns/DIV)
FIGURE 12. EYE PATTERN: 480Mbps WITH USB SWITCHES IN THE SIGNAL PATH
11
FN6627.0 December 20, 2007
ISL54209 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 USB SIGNAL WITH USB SWITCHES IN THE SIGNAL PATH
1 USB SWITCH 0 -1 NORMALIZED GAIN (dB) NORMALIZED GAIN (dB) -2 -3 -4
0 RL = 50 VSIGNAL = 0.2VP-P TO 2VP-P -20 VDCOFFSET = 1.5VDC
-40
-60
-80
RL = 50 VSIGNAL = 0.2VP-P TO 2VP-P
-100
1M
10M 100M FREQUENCY (Hz)
1G
-120 0.001M
0.01M
0.1M 1M 10M FREQUENCY (Hz)
100M 500M
FIGURE 14. FREQUENCY RESPONSE
FIGURE 15. OFF-ISOLATION USB SWITCHES
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FN6627.0 December 20, 2007
ISL54209 Typical Performance Curves TA = +25C, Unless Otherwise Specified. (Continued)
0 RL = 50 VSIGNAL = 0.2VP-P TO 2VP-P -20 NORMALIZED GAIN (dB)
Die Characteristics
SUBSTRATE POTENTIAL (POWERED UP): GND
-40
-60
TRANSISTOR COUNT: 98
-80
PROCESS: Submicron CMOS
-100
-120 0.001M
0.01M
0.1M
1M
10M
100M
500M
FREQUENCY (Hz)
FIGURE 16. OFF-ISOLATION AUDIO SWITCHES
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FN6627.0 December 20, 2007
ISL54209 Ultra Thin Quad Flat No-Lead Plastic Package (UTQFN)
D A B
L10.2.1x1.6A
10 LEAD ULTRA THIN QUAD FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL MIN 0.45 NOMINAL 0.50 0.127 REF 0.15 2.05 1.55 0.20 2.10 1.60 0.50 BSC 0.20 0.35 0.40 10 4 1 0 12 0.45 0.25 2.15 1.65 MAX 0.55 0.05 NOTES 5 2 3 3 4 Rev. 3 6/06 NOTES: 1. Dimensioning and tolerancing conform to ASME Y14.5-1994. 2. N is the number of terminals. 3. Nd and Ne refer to the number of terminals on D and E side, respectively. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. 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. Maximum package warpage is 0.05mm. 8. Maximum allowable burrs is 0.076mm in all directions. 9. Same as JEDEC MO-255UABD except: No lead-pull-back, "A" MIN dimension = 0.45 not 0.50mm "L" MAX dimension = 0.45 not 0.42mm. 10. For additional information, to assist with the PCB Land Pattern Design effort, see Intersil Technical Brief TB389.
2.50 1.75
6 INDEX AREA 2X 2X 0.10 C
N
E
1 0.10 C
2
A A1
TOP VIEW
A3 b
0.10 C 0.05 C SEATING PLANE A1 SIDE VIEW (DATUM A) PIN #1 ID 1 2 NX L N (DATUM B) N-1 e 3 (ND-1) X e BOTTOM VIEW C L NX (b) 5 SECTION "C-C" CC e (A1) NX b 5 A
C
D E e k L N
4xk
Nd Ne
0.10 M C A B 0.05 M C
L
TERMINAL TIP
FOR ODD TERMINAL/SIDE
b
0.05 MIN
L 2.00 0.80
0.275
0.10 MIN DETAIL "A" PIN 1 ID 0.50
0.25
LAND PATTERN 10
14
FN6627.0 December 20, 2007
ISL54209 Thin Dual Flat No-Lead Plastic Package (TDFN)
2X 0.10 C A A D 2X 0.10 C B
L10.3x3A
10 LEAD THIN DUAL FLAT NO-LEAD PLASTIC PACKAGE MILLIMETERS SYMBOL A A1
E
MIN 0.70 -
NOMINAL 0.75 0.20 REF
MAX 0.80 0.05
NOTES -
6 INDEX AREA TOP VIEW B
A3 b D D2 E
// A 0.10 C 0.08 C
0.20 2.95 2.25 2.95 1.45
0.25 3.0 2.30 3.0 1.50 0.50 BSC
0.30 3.05 2.35 3.05 1.55
5, 8 7, 8 7, 8 -
E2 e k
0.25 0.25
0.30 10 5
0.35
8 2 3 Rev. 3 3/06
C SEATING PLANE
SIDE VIEW
A3
L N
D2 (DATUM B) 1 2 D2/2
7
8
Nd NOTES:
6 INDEX AREA (DATUM A)
1. Dimensioning and tolerancing conform to ASME Y14.5-1994.
NX k E2 E2/2
2. N is the number of terminals. 3. Nd refers to the number of terminals on D. 4. All dimensions are in millimeters. Angles are in degrees. 5. Dimension b applies to the metallized terminal and is measured between 0.15mm and 0.30mm from the terminal tip. 6. 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.
NX L N 8 N-1 NX b e (Nd-1)Xe REF. BOTTOM VIEW C L NX (b) 5 SECTION "C-C" CC e TERMINAL TIP (A1) L1 9L 5 0.10 M C A B
7. Dimensions D2 and E2 are for the exposed pads which provide improved electrical and thermal performance. 8. Nominal dimensions are provided to assist with PCB Land Pattern Design efforts, see Intersil Technical Brief TB389. 9. Compliant to JEDEC MO-229-WEED-3 except for D2 dimensions.
FOR ODD TERMINAL/SIDE
All Intersil U.S. products are manufactured, assembled and tested utilizing ISO9000 quality systems. Intersil Corporation's quality certifications can be viewed 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 15
FN6627.0 December 20, 2007

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