View MAX4906EFELB_4132485.PDF datasheet online --- IC-ON-LINE

Datasheet File OCR Text:

19-0613; Rev 1; 11/07
High-/Full-Speed USB 2.0 Switches with High ESD
General Description
The MAX4906EF are electrostatic discharge (ESD)-protected analog switches that combine low on-capacitance (CON) and low on-resistance (RON) necessary for highperformance switching applications. The COM_ inputs are protected against 15kV ESD without latchup or damage. The device is designed for USB 2.0 high-speed applications at 480Mbps. The switches also handle all the requirements for USB low- and full-speed signaling. The MAX4906EF features two single-pole/double-throw (SPDT) switches. The device is fully specified to operate from a single +2.7V to +3.6V power supply and is protected against a +5.5V short to all analog inputs (COM_, NC_, NO_). This feature makes the MAX4906EF fully compliant with the USB 2.0 specification of +5.5V fault protection. The device features a low threshold voltage and a +1.4V VIH, permitting them to be used with low-voltage logic. The device features a QP input that when driven high, turns the charge pump off and sets the device in standby mode. When the device is in standby mode, the quiescent supply current is reduced to 3A (max) and the switches remain operable. The MAX4906EF is available in a space-saving, 2mm x 2mm DFN package and operates over a -40C to +85C temperature range.
Features
15kV (Human Body Model) ESD Protection, on COM_ Fully Specified for a Single +2.7V to +3.6V Power-Supply Voltage Low 4 (typ), 7 (max) On-Resistance (RON) -3dB Bandwidth: 500MHz (typ) Low Bit-to-Bit Skew 20ps Charge-Pump Noise = 90V (typ) Charge-Pump Enable No Need for Logic-Level Shifters for 1.4V or Above COM_ Analog Inputs Fault-Protected Against Shorts to USB Supply Rail Up to +5.5V Low Supply Current 3A (max) in Standby Space-Saving 10-Pin, 2mm x 2mm DFN Package
MAX4906EF
Ordering Information
PART MAX4906EFELB+T PIN-PACKAGE 10 DFN-10 TOP MARK AAJ PKG CODE L1022-1
Applications
USB Switching Cell Phones PDAs Digital Still Cameras GPS Notebook Computers Relay Replacements Ethernet Switching Video Switching Bus Switches T3/E3 Switches for Redundancy Protection
Note: The device operates over the -40C to +85C operating temperature range. +Denotes a lead-free package.
Typical Operating Characteristics
EYE DIAGRAM
V+ = 3.3V IBIAS = 9mA UI = 2.08ns VNO1OUT
Pin Configuration
TOP VIEW
+ IN 1 2 3 4 5 10 9 V+ NC1 NC2 NO1 NO2 QP
USB 2.0 HIGH SPEED TRANSMIT TEMPLATE
100mV/div
GND COM1 COM2
MAX4906EF
8 7 6
VNO2OUT 200ps/div
DFN
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF
ABSOLUTE MAXIMUM RATINGS
(All voltages referenced to GND.) V+ .............................................................................-0.3V to +4V IN, QP (Note 1) .........................................................-0.3V to +4V COM_, NO_, NC_ ..................................................-0.3V to +5.5V Continuous Current (COM_ to NO_/NC_) ......................120mA Peak Current, (COM_ to NO_/NC_) (pulsed at 1ms 10% duty cycle).................................240mA Continuous Power Dissipation (TA = +70C) 10-Pin DFN (derate 5.0mW/C above +70C) ...........403mW Operating Temperature Range ..........................-40C to +85C Junction Temperature .....................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Note 1: Signals on IN, QP exceeding GND are clamped by internal diodes. Limit forward-diode current to maximum current rating.
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V+ = +2.7V to +3.6V, TA = TMIN to TMAX, charge-pump enabled, unless otherwise noted. Typical values are at V+= 3.3V, TA = +25C.) (Note 2)
PARAMETER ANALOG SWITCH Analog Signal Range Fault-Protection Trip Threshold (Note 9) VCOM_,VNO_, QP = 0 or V+ (Note 3) VNC_ VFP V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, QP = 0V V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 2.7V, QP = 0V V+ = 3.0V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, QP = V+ V+=2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, QP = V+ V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V, 2.7V (Note 4) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 0.5 8 5 4 0 3.62 3.9 3.8 3.6 4.20 5 6 7 8 12 13 15 17 0.8 1.0 V V SYMBOL CONDITIONS MIN TYP MAX UNITS
On-Resistance, Charge-Pump Enabled
RON
On-Resistance, Charge-Pump Disabled
RON
On-Resistance Match Between Channels
RON
On-Resistance Flatness
RFLAT(ON)
V+ = 2.7V, ICOM_ = -10mA, VCOM_ = 0V, 1.5V (Note 5)
0.5
2
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches with High ESD
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +2.7V to +3.6V, TA = TMIN to TMAX, charge-pump enabled, unless otherwise noted. Typical values are at V+= 3.3V, TA = +25C.) (Note 2)
PARAMETER Off-Leakage Current On-Leakage Current SWITCH AC PERFORMANCE On-Channel -3dB Bandwidth BW RL = RS = 50, signal = 0dBm, Figure 1 f = 10MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 f = 250MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 f = 10MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 f = 250MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 Any input or output switch terminal = 50 500 -60 dB -32 -59 dB -31 90 V MHz SYMBOL INC_, INO_
(OFF)
MAX4906EF
CONDITIONS V+ = 3.6V, VCOM_ = 0.3V, 3.3V; VNO_ or VNC_ = 3.3V, 0.3V V+ = 3.6V, VCOM = 0.3V, 3.3V; VNO_ or VNC_ = 0.3V, 3.3V, or floating
MIN -1 -1
TYP
MAX +1 +1
UNITS A A
INC_, INO_
(ON)
Off-Isolation
VISO
Crosstalk (Note 6)
VCT
Charge-Pump Noise (Note 7) SWITCH DYNAMICS NO_, NC_, COM_ Off-Capacitance (Note 8) NO_, NC_, COM_ On-Capacitance (Note 8) Switch On-Capacitance Matching (Note 8) Turn-On Time
VQP
C(OFF) C(ON) CONM
f = 1MHz, Figure 2 f = 1MHz, Figure 2 f = 1MHz VNO_, VNC_ = 1.5V; RL = 300, CL = 35pF, VIH = V+, VIL = 0V, QP = 0V, Figure 3 VNO_, VNC_ = 1.5V; RL = 300, CL = 35pF, VIH = V+, VIL = 0V, QP = 0V, Figure 3 RL = RS = 50, Figure 4 VCOM_ = 0 to 5V step, RL = RS = 50, CL = 10pF, Figure 5 VCOM_ = 5V to 3V step, RL = RS = 50, CL = 10pF, Figure 5 Skew between switch 1 and switch 2, RL = RS = 50, Figure 4 Skew between opposite transitions in same switch, RL = RS = 50, Figure 4
9 10 0.4
10 12
pF pF pF
tON
1.4
ns
Turn-Off Time Propagation Delay Fault-Protection Response Time Fault-Protection Recovery Time Output Skew Between Switches (Note 8) Output Skew Same Switch (Note 8)
tOFF tPLH_,tPHL tFP tFPR tSK(o) tSK(p)
35 0.2 1 1 20 5 100 100
ns ns s s ps ps
_______________________________________________________________________________________
3
High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +2.7V to +3.6V, TA = TMIN to TMAX, charge-pump enabled, unless otherwise noted. Typical values are at V+= 3.3V, TA = +25C.) (Note 2)
PARAMETER Total Harmonic Distortion Plus Noise Charge Injection SWITCH LOGIC Logic-Input Voltage Low Logic-Input Voltage High Input-Logic Hysteresis Input Leakage Current Operating Supply-Voltage Range Quiescent Supply Current Quiescent Supply Current With Charge-Pump Disabled ESD PROTECTION COM_ Human Body Model 15 kV VIL VIH VHYST IIN V+ I+ I+ V+ = 3.6V, VIN = 0 or V+, QP = 0V V+ = 3.6V, VIN = 0 or V+, QP = V+ V+ = 3.6V, VIN = 0 or V+ -1 2.7 160 1.4 100 +1 3.6 1000 3 0.4 V V mV A V A A SYMBOL THD+N Q CONDITIONS VCOM_ = 2VP-P, RL = 600, f = 20Hz to 20kHz VGEN = 1.5V, RGEN = 0, CL = 100pF, Figure 6 MIN TYP 0.01 20 MAX UNITS % pC
Note 2: All units are 100% production tested at TA = +25C. Limits over the operating temperature range are guaranteed by design and not production tested. Note 3: The switch will turn off for voltages above (VFP); therefore, protecting downstream circuits in case of a fault condition. Note 4: RON(MAX) = | RON(CH1) - RON(CH2) | Note 5: Flatness is defined as the difference between the maximum and minimum value of on-resistance, as measured over specified analog signal ranges. Note 6: Between any two switches. Note 7: Noise specification is measured peak to peak. Note 8: Switch off-capacitance, switch on-capacitance, output skew between switches, and output skew same-switch limits are not production tested; design guaranteed by correlation. Note 9: Fault-protection trip threshold, limits are not production tested; guaranteed by design.
Typical Operating Characteristics
(V+ = 3.3V, TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM
MAX4906EF toc01
ON-RESISTANCE vs. VCOM
MAX4906EF toc02
LEAKAGE CURRENT vs. TEMPERATURE
10 9 COM ON-LEAKAGE CURRENT (nA) 8 7 6 5 4 3 2 1 COM OFF-LEAKAGE -40 -15 10 35 60 85 COM ON-LEAKAGE V+ = 3.6V
MAX4906EF toc03
6 5 V+ = 2.7V 4 RON ()
V+ = 3.6V
6 5 4 RON () TA = +85C
10 9 8 7 6 5 4 3 2 1 0 COM OFF-LEAKAGE CURRENT (pA)
3 2 1 0 0 0.9 1.8 VCOM (V)
V+ = 3.3V
3 TA = -40C 2 1 0
TA = +25C
0 0 1.1 VCOM (V) 2.2 3.3 TEMPERATURE (C)
2.7
3.6
4
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches with High ESD
Typical Operating Characteristics (continued)
(V+ = 3.3V, TA = +25C, unless otherwise noted.)
CHARGE INJECTION vs. VCOM
CL = 100pF 20 CHARGE INJECTION (pC)
MAX4906EF toc04
MAX4906EF
QUIESCENT SUPPLY CURRENT vs. TEMPERATURE
MAX4906EF toc05
QUIESCENT SUPPLY CURRENT vs. LOGIC LEVEL
MAX4906EF toc06
25
200 QUIESCENT SUPPLY CURRENT (A) 180 160 140 120 100 80 60 40 20 V+ = 2.7V V+ = 3.6V
220 QUISCENT SUPPLY CURRENT (A)
200
15
180
10
160
5
0 0 1.1 VCOM (V) 2.2 3.3
0 -40 -15 10 35 60 85 TEMPERATURE (C)
140 0 1.1 2.2 3.3 LOGIC LEVEL (V)
LOGIC-INPUT LOW THRESHOLD vs. SUPPLY VOLTAGE
MAX4906EF toc07
TURN-ON/-OFF TIME vs. SUPPLY VOLTAGE
5
MAX4906EF toc08
1.0 LOGIC-INPUT LOW THRESHOLD (V)
40
0.8 VIL
4 tOFF
38
0.4
2
34
0.2
1
tON
32
0 2.7 3.0 3.3 3.6 SUPPLY VOLTAGE (V)
0 2.7 3.0 3.3 SUPPLY VOLTAGE (V) 3.6
30
TURN-ON/-OFF TIME vs. TEMPERATURE
10
MAX4906EF toc09
RISE-/FALL-TIME PROPAGATION DELAY vs. SUPPLY VOLTAGE
OUTPUT RISE-/FALL-TIME DELAY (ps)
MAX4906EF toc10
40
250
8 tOFF
38
240
tOFF (ns)
tON (s)
6
36
230 tPHL 220
4
34
2 tON 0 -40 -15 10 35 TEMPERATURE (C) 60 85
32
210
tPLH
30
200 2.7 3.0 3.3 SUPPLY VOLTAGE (V) 3.6
_______________________________________________________________________________________
tOFF (ns)
tON (s)
0.6
3
36
5
High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF
Typical Operating Characteristics (continued)
(V+ = 3.3V, TA = +25C, unless otherwise noted.)
RISE-/FALL-TIME PROPAGATION DELAY vs. TEMPERATURE
MAX4906EF toc11
SAME SWITCH OUTPUT SKEW vs. SUPPLY VOLTAGE
MAX4906EF toc12
OUTPUT SKEW BETWEEN SWITCHES vs. SUPPLY VOLTAGE
MAX4906EF toc13
250 OUTPUT RISE-/FALL-TIME DELAY (ps)
10 9 8 OUTPUT SKEW (ps) 7 6 5 4 3 2
30
240
OUTPUT SKEW (ps) 2.7 3.0 3.3 SUPPLY VOLTAGE (V) 3.6
20
230 tPLH 220
10
210 tPHL 200 -40 -15 10 35 TEMPERATURE (C) 60 85
1 0 0 2.7 3.0 3.3 SUPPLY VOLTAGE (V) 3.6
FREQUENCY RESPONSE
MAX4906EF toc14
TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY
RL = 600
MAX4906EF toc15
0 OFF-ISOLATION AND CROSSTALK (dB) -10 -20 -30 -50 -60 -70 -80 -90 -100 -110 1 10 100 FREQUENCY (MHz) CROSSTALK OFF-ISOLATION -40
1
0.1 THD+N (%) 0.01 0.001 1000 10 100 1k 10k FREQUENCY (Hz) 100k
6
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches with High ESD
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 NAME IN QP GND COM1 COM2 NO2 NO1 NC2 NC1 V+ FUNCTION Digital Control Input. IN controls switch 1 and switch 2. Charge-Pump Enable Input. Drive QP high to turn charge pump off. For normal operation, drive QP low. Ground Analog Switch 1--Common Terminal Analog Switch 2--Common Terminal Analog Switch 2--Normally Open Terminal Analog Switch 1--Normally Open Terminal Analog Switch 2--Normally Closed Terminal Analog Switch 1--Normally Closed Terminal Positive-Supply Voltage Input. Connect V+ to a +2.7V to +3.6V supply voltage. Bypass V+ to GND with a 0.1F capacitor.
MAX4906EF
Test Circuits/Timing Diagrams
+3.3V 10nF NETWORK ANALYZER 0V OR V+ IN_ V+ COM1 VIN 50 50
V OFF-ISOLATION = 20log OUT VIN V CROSSTALK = 20log OUT VIN
NC1 50
MAX4906EF
NO1* VOUT MEAS REF
50 GND
50
MEASUREMENTS ARE STANDARDIZED AGAINST SHORTS AT IC TERMINALS. OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" NO_ OR NC_ TERMINAL ON EACH SWITCH. CROSSTALK IS MEASURED FROM ONE CHANNEL TO THE OTHER CHANNEL. SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
*FOR CROSSTALK THIS PIN IS NO2. NC2 AND COM2 ARE OPEN.
Figure 1. Off-Isolation and Crosstalk
_______________________________________________________________________________________
7
High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF
Test Circuits/Timing Diagrams (continued)
10nF V+
V+ COM_
MAX4906EF
IN CAPACITANCE METER f = 1MHz NC_ or NO_ GND
VIL OR VIH
Figure 2. Channel Off-/On-Capacitance
MAX4906EF
V+ V+ COM_ LOGIC INPUT VOUT RL IN CL VOUT GND SWITCH OUTPUT 0V t ON 0.9 x V0UT t OFF VIH 50% VIL
t r < 5ns t f < 5ns
VN_
NO_ OR NC_
LOGIC INPUT
0.1 x VOUT
CL INCLUDES FIXTURE AND STRAY CAPACITANCE. RL VOUT = VN_ RL + RON
(
)
IN DEPENDS ON SWITCH CONFIGURATION; INPUT POLARITY DETERMINED BY SENSE OF SWITCH.
Figure 3. Switching Time
8
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches with High ESD
Test Circuits/Timing Diagrams (continued)
MAX4906EF
MAX4906EF
RS IN+ NC1 OR NO1 COM1 RL RS INNC2 OR NO2 OUT+ RISE-TIME PROPAGATION DELAY = tPLHX OR tPLHY FALL-TIME PROPAGATION DELAY = tPHLX OR tPHLY tSK(O) = |tPLHX - tPLHY| OR |tPHLX - tPHLY| tSK(P) = |tPLHX - tPHLX| OR |tPLHY - tPHLY|
COM2 RL IN VIL TO VIH
OUT-
tINRISE V+ VIN+ 0V V+ VIN0V tOUTRISE tPLHX V+ VOUT+ 0V V+ VOUT0V tPHLY tPLHY 50% 50% 50% 50% 10% tPHLX 90% 50% 50% 50% 50% 10%
tINFALL
90%
90% 10%
tOUTFALL
90% 10%
Figure 4. Output Signal Skew, Rise/Fall Time, Propagation Delay
_______________________________________________________________________________________
9
High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF
Test Circuits/Timing Diagrams (continued)
5V 2.5V VCOM_ 0V tPF tFPR 3V
VPF VNO_ VNC_ 2.5V 1.5V 0V 3V
Figure 5. MAX4906EF Fault-Protection Response/Recovery Time
MAX4906EF
V+ V+ RGEN NC_ OR NO_ GND IN OFF ON Q = (V OUT )(C L ) COM_ CL VOUT VOUT IN OFF ON
VOUT
OFF
V GEN
VIL TO VIH
IN
OFF
LOGIC-INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 6. Charge Injection
Detailed Description
The MAX4906EF are ESD-protected analog switches where the COM_ inputs are further protected up to 15kV ESD without latchup or damage. The device is targeted for USB 2.0 high-speed (480Mbps) switching applications. The device still meets USB low- and fullspeed requirements and is suitable for 10/100 Ethernet switching. The MAX4906EF features two SPDT switches. The MAX4906EF is fully specified to operate from a single +2.7V to +3.6V supply and is +5.5V fault protected.
10
When operating from a +2.7V to +3.6V supply, the low threshold of the device permits them to be used with logic levels as low as 1.4V. The MAX4906EF is based on a charge-pump-assisted n-channel architecture and thus operate at 170A (max) quiescent current. The device features a standby mode to reduce the quiescent current to less than 3A (max).
Digital Control Input
The MAX4906EF provides a single-digit control logic input, IN. IN controls the position of the switches as shown in the Functional Diagram/Truth Table. Driving IN
______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches with High ESD
Functional Diagram/Truth Table
V+ QP
device in standby mode. When the device is in standby mode, the quiescent supply current is reduced to 3A (max) and the switches remain operable. When QP is driven low, the charge pump is enabled and the switches enter an improved high-performance mode.
MAX4906EF
MAX4906EF
IN
Applications Information
USB Switching
The MAX4906EF analog switch is fully compliant with the USB 2.0 specification. The low on-resistance and low on-capacitance of these switches make the device ideal for high-performance switching applications. The MAX4906EF is ideal for routing USB data lines (see Figure 7) and for applications that require switching between multiple USB hosts (see Figure 8). The MAX4906EF also features +5.5V fault protection to guard systems against shorts to the USB bus voltage that is recommended for all USB applications.
NO1 COM1 NC1 NO2 COM2 NC2
GND
Ethernet Switching
The wide bandwidth of the MAX4906EF meets the needs of 10/100 Ethernet switching. The device switch the signals from two interface transformers and connect the signals to a single 10/100 Base-T Ethernet PHY, simplifying docking station design and reducing manufacturing costs.
MAX4906EF QP 0 0 1 1 IN 0 1 0 1 NO1 NO2 OFF ON OFF ON NC1 NC2 ON OFF ON OFF HIGH PERFORMANCE HIGH PERFORMANCE LOW PERFORMANCE LOW PERFORMANCE
15kV ESD Protection
As with all Maxim devices, ESD-protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. COM_ are further protected against static electricity. Maxim's engineers have developed state-of-the-art structures to protect these pins against ESD up to 15kV without damage. The ESD structures withstand high ESD in normal operation, and when the device is powered down. After an ESD event, the MAX4906EF continues to function without latchup, whereas competing products can latch and must be powered down to restore functionality. ESD protection can be tested in various ways. The ESD protection of COM_ are characterized for 15kV (Human Body Model) using the MIL-STD-883. ESD Test Conditions ESD performance depends on a variety of conditions. Contact Maxim for a reliability report that documents test setup, test methodology, and test results. Human Body Model Figure 9a shows the Human Body Model and Figure 9b shows the current waveform it generates when discharged into a low impedance. This model consists of
rail-to-rail minimizes power consumption. With a +2.7V to +3.6V supply voltage range, the device is +1.4V logic compatible.
Analog Signal Levels
The on-resistance of the MAX4906EF is very low and stable as the analog input signals are swept from ground to V+ (see the Typical Operating Characteristics). These switches are bidirectional, allowing NO_, NC_, and COM_ to be configured as either inputs or outputs.
Overvoltage Fault Protection
The MAX4906EF features +5.5V fault protection to all analog inputs. Fault protection prevents these switches from being damaged due to shorts to the USB bus voltage rail.
Charge-Pump Enable
The MAX4906EF features a charge-pump enable mode that improves the performance and the dynamic range of the device. The device features a QP input that when driven high, turns the charge pump off and sets the
______________________________________________________________________________________
11
High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF
ASIC I D+ USB TRANSCEIVER
RC 1M RD 1500 DISCHARGE RESISTANCE DEVICE UNDER TEST
MAX4906EF
DNC1 COM1 NO1
VBUS
CHARGE-CURRENTLIMIT RESISTOR HIGHVOLTAGE DC SOURCE
D+
Cs 100pF
STORAGE CAPACITOR
NC2 ASIC II D+ USB TRANSCEIVER COM2 NO2 D-
Figure 9a. Human Body ESD Test Model
DGND USB CONNECTOR
IP 100% 90% AMPERES 36.8% 10% 0 0 tRL TIME tDL CURRENT WAVEFORM Ir PEAK-TO-PEAK RINGING (NOT DRAWN TO SCALE)
Figure 7. USB Data Routing
MAX4906EF
NC1 COM1 NO1 USB TRANSCEIVER COM2 NO2 USB1USB1+ USB0USB0+
Figure 9b. Human Body Current Waveform
NC2
Figure 8. Switching Between Multiple USB Hosts
a 100pF capacitor charged to the ESD voltage of interest, which is then discharged into the test device through a 1.5k resistor.
Chip Information
PROCESS: BiCMOS
Layout
High-speed switches require proper layout and design procedures for optimum performance. Keep designcontrolled-impedance PC board traces as short as possible. Ensure that bypass capacitors are as close to the device as possible. Use large ground planes where possible.
12
______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches with High ESD
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
6, 8, 10L UDFN.EPS
MAX4906EF
D
A
e
b
N
XXXX XXXX XXXX
SOLDER MASK COVERAGE
E
PIN 1 0.10x45
L
PIN 1 INDEX AREA SAMPLE MARKING 7 1 A A
L1
(N/2 -1) x e)
C L
C L
b A A2 A1
L e
EVEN TERMINAL
L e
ODD TERMINAL
PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm
-DRAWING NOT TO SCALE-
21-0164
A
1
2
______________________________________________________________________________________
13
High-/Full-Speed USB 2.0 Switches with High ESD MAX4906EF
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information go to www.maxim-ic.com/packages.)
COMMON DIMENSIONS SYMBOL A A1 A2 D E L L1 MIN. 0.70 0.15 0.020 1.95 1.95 0.30 NOM. 0.75 0.20 0.025 2.00 2.00 0.40 0.10 REF. MAX. 0.80 0.25 0.035 2.05 2.05 0.50
PACKAGE VARIATIONS PKG. CODE L622-1 L822-1 L1022-1 N 6 8 10 e 0.65 BSC 0.50 BSC 0.40 BSC b 0.300.05 0.250.05 0.200.03 (N/2 -1) x e 1.30 REF. 1.50 REF. 1.60 REF.
PACKAGE OUTLINE, 6, 8, 10L uDFN, 2x2x0.80 mm
-DRAWING NOT TO SCALE-
21-0164
A
2
2
14
______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches with High ESD
Revision History
REVISION NUMBER 0 1 REVISION DATE 8/06 11/07 Initial release Changes to EC Table DESCRIPTION PAGES CHANGED -- 2, 4
MAX4906EF
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products, Inc.

▲Up To Search▲

Price & Availability of MAX4906EFELB

	To Download MAX4906EFELB Datasheet File
If you can't view the Datasheet, Please click here to try to view without PDF Reader .