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19-3797; Rev 2; 1/07
High-/Full-Speed USB 2.0 Switches
General Description
The MAX4906/MAX4906F/MAX4907/MAX4907F analog switches combine the low on-capacitance (CON) and low on-resistance (R ON ) necessary for high-performance switching applications. These devices are designed for USB 2.0 high-speed applications at 480Mbps. These switches will also handle all the requirements for USB low- and full-speed signaling. The MAX4906/MAX4906F feature two single-pole/double-throw (SPDT) switches, and the MAX4907/ MAX4907F feature two single-pole/single-throw switches (SPST). The MAX4907/MAX4907F have a low 7 (max) on-resistance and 7pF (max) on-capacitance. These devices are fully specified to operate from a single +3.0V to +3.6V power supply and are protected against a +5.5V short to COM1 and COM2. This feature makes them fully compliant with the USB 2.0 specification of +5.5V fault protection. These devices feature a low threshold voltage and a +1.4V VIH, permitting them to be used with low-voltage logic. The MAX4906/ MAX4906F/MAX4907/MAX4907F operate at 300A (max) quiescent current and feature a shutdown input to reduce the quiescent current to less than 2A (max). The MAX4906/MAX4906F/MAX4907/MAX4907F are available in space-saving, 2mm x 2mm DFN packages and operate over a -40C to +85C temperature range.
Features
Fully Specified for a Single +3.0V to +3.6V Power-Supply Voltage Low 4 (typ), 7 (max) On-Resistance (RON) MAX4907/MAX4907F Ultra-Low 4pF (typ), 7pF (max) On-Capacitance (CON) -3dB Bandwidth: 1GHz (typ) Low Bit-to-Bit Skew 100ps Shutdown Input Reduces Power Consumption to 2A (max) 3.3V, 1.8V, and 1.4V Logic Compatible COM_ Analog Inputs Fault Protected Against Shorts to USB Supply Rail Up to +5.5V Space-Saving Packages 8-Pin and 10-Pin, 2mm x 2mm DFN Packages
MAX4906/MAX4606F/MAX4907/MAX4907F
Ordering Information
PART MAX4906ELB MAX4906FELB MAX4907ELA MAX4907FELA PIN-PACKAGE 10 DFN 10 DFN 8 DFN 8 DFN PKG CODE L1022-1 L1022-1 L822-1 L822-1
Applications
Cell Phones PDAs Digital Still Cameras GPS Notebook Computers Relay Replacements USB Switching Ethernet Switching Video Switching Bus Switches T3/E3 Switches for Redundancy Protection
Note: All devices operate over the -40C to +85C operating temperature range.
Selector Guide appears at end of data sheet.
Typical Operating Characteristics
EYE DIAGRAM
VNO1OUT V+ =3.3V IBIAS = 9mA f = 240MHz USB 2.0 HIGH SPEED TRANSMIT TEMPLATE
Pin Configurations
TOP VIEW
IN SHDN/EN GND 1 2 3 4 5 10 9 V+ NC1 NC2 NO1 NO2
100mV/div
COM1 COM2
MAX4906 MAX4906F
8 7 6
DFN
VNO2OUT 500ps/div
Pin Configurations continued at end of data sheet. 1
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.
High-/Full-Speed USB 2.0 Switches MAX4906/MAX4606F/MAX4907/MAX4907F
ABSOLUTE MAXIMUM RATINGS
Voltages Referenced to GND V+ .............................................................................-0.3V to +4V IN, SHDN, SHDN/EN (Note 1) ......................-0.3V to (V+ + 0.3V) COM_, NO_, NC_ ..................................................-0.5V 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) 8-Pin DFN (derate 5.0mW/C above +70C) .............400mW 10-Pin DFN (derate 5.3mW/C above +70C) ........423.7mW 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, SHDN or SHDN/EN exceeding V+ or 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+ = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+= 3.3V, TA = +25C.) (Note 2)
PARAMETER ANALOG SWITCH Analog Signal Range Fault-Protection Trip Threshold On-Resistance VCOM_,VNO_, SHDN or SHDN/EN = 0 (Note 3) VNC_ VFP RON ICOM_ = -40mA, 0V VCOM_ V+, SHDN or SHDN/EN = 0 ICOM_ = -40mA, 0V VCOM_ 1.5V, SHDN = V+ (MAX4907/MAX4907F) V+ = 3.0V, ICOM_= -40mA, VCOM_ = 1.5V (Note 4) TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX TA = +25C TA = TMIN to TMAX 1.0 -1 -1 +1 +1 0.7 4 0 3.6 4 V+ 4.0 7 8 10 13 1.2 1.5 A A V V SYMBOL CONDITIONS MIN TYP MAX UNITS
On-Resistance During Shutdown
RONSH
On-Resistance Match Between Channels On-Resistance Flatness Off-Leakage Current On-Leakage Current SWITCH AC PERFORMANCE On-Channel -3dB Bandwidth
RON
RFLAT (ON) ICOM_(OFF) ICOM_(ON)
V+ = 3.0V, ICOM_ = -40mA, VCOM_ = 1.5V, 3.0V (Note 5) 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 RL = RS = 50, signal = 0dBm, Figure 1 f = 10MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1
BW
1000 -60 -32 -26
MHz
Off-Isolation
VISO
f = 250MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 f = 500MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1
dB
2
_______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +3V to +3.6V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at V+ = 3.3V, TA = +25C.) (Note 2)
PARAMETER SYMBOL CONDITIONS f = 10MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 Crosstalk (Note 6) VCT f = 250MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 f = 500MHz; VNO_, VNC_ = 1VP-P; RL = RS = 50, Figure 1 SWITCH DYNAMICS NO_, NC_ Off-Capacitance C(OFF) f = 1MHz, Figure 2 (Note 7) MAX4906ELB, MAX4906FELB MAX4907ELA, MAX4907FELA MAX4906ELB, MAX4906FELB Switch On-Capacitance Matching CONM f = 1MHz (Note 7) MAX4907ELA, MAX4907FELA VNO_, VNC_ = 1.5V; RL = 300, CL = 35pF, VIH = V+, VIL = 0V, SHDN or SHDN/EN = 0V, Figure 3 VNO_, VNC_ = 1.5V; RL = 300, CL = 35pF, VIH = V+, VIL = 0V, SHDN or SHDN/EN = 0V, Figure 3; TA = +25C RL = RS = 50, Figure 4 VCOM_ = 0 to 5V step, RL = RS = 50, Figure 5 VCOM_ = 5V to 3V step, RL = RS = 50, Figure 5 Skew between switch 1 and switch 2, RL = RS = 50, Figure 4 (Note 7) Skew between opposite transitions in same switch, RL = RS = 50, Figure 4 (Note 7) 50 50 0.25 3.0 2 100 100 0.3 2 6 4 0.4 pF 4 9 pF 7 pF MIN TYP -59 -31 -25 dB MAX UNITS
MAX4906/MAX4606F/MAX4907/MAX4907F
Switch On-Capacitance
C(ON)
f = 1MHz, Figure 2 (Note 7)
Turn-On Time
tON
60
ns
Turn-Off Time Propagation Delay Fault-Protection Response Time Fault-Protection Recovery Time Output Skew Between Switches Output Skew Same Switch
tOFF tPLH_,tPHL tFP tFPR tSK(o) tSK(p)
30
ns ns s s ps ps
_______________________________________________________________________________________
3
High-/Full-Speed USB 2.0 Switches MAX4906/MAX4606F/MAX4907/MAX4907F
ELECTRICAL CHARACTERISTICS (continued)
(V+ = +3V to +3.6V, TA = TMIN to TMAX, 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 During Shutdown VIL VIH VHYST IIN V+ I+ I+ V+ = 3.6V, VIN = 0 or V+, SHDN or SHDN/EN = 0 V+ = 3.6V, VIN = 0 or V+, SHDN or SHDN/EN = V+ V+ = 3.6V, VIN = 0 or V+ -1 3.0 120 1.1 100 +1 3.6 300 2 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 0.03 5 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 (MAX4906F/MAX4907F). 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: Switch off-capacitance, switch on-capacitance, output skew between switches, and output skew same-switch limits are not production tested; design guaranteed by bench characterization.
Typical Operating Characteristics
(TA = +25C, unless otherwise noted.)
ON-RESISTANCE vs. VCOM
MAX4906 toc01
ON-RESISTANCE vs. VCOM
MAX4906 toc02
LEAKAGE CURRENT vs. TEMPERATURE
4500 4000 LEAKAGE CURRENT (pA) 3500 3000 2500 2000 1500 1000 500 COM OFF-LEAKAGE COM ON-LEAKAGE V+ = 3.6V
MAX4906 toc03
6 V+ = 3.3V 5 4 RON () 3 2 1 0 0 0.9 1.8 VCOM (V) 2.7 V+ = 3.0V
6 V+ = 3.3V 5 4 RON () 3 2 1 0 TA = +40C TA = +25C TA = +85C
5000
V+ = 3.6V
0 0 1.1 VCOM (V) 2.2 3.3 -40 -15 10 35 60 85 TEMPERATURE (C)
3.6
4
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High-/Full-Speed USB 2.0 Switches
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
CHARGE INJECTION vs. VCOM
MAX4906 toc04
MAX4906/MAX4606F/MAX4907/MAX4907F
QUIESCENT SUPPLY CURRENT vs. TEMPERATURE
MAX4906 toc05
QUIESCENT SUPPLY CURRENT vs. LOGIC LEVEL
V+ = 3.3V 140
MAX4906 toc06
10 CL = 100pF V+ = 3.3V CHARGE INJECTION (pC) 8
160 QUIESCENT SUPPLY CURRENT (A) 140 120 100 80 60 40 20 V+ = 3.0V V+ = 3.6V
150 QUIESCENT SUPPLY CURRENT (A)
6
130
4
120
2
110
0 0 1.1 VCOM (V) 2.2 3.3
0 -40 -15 10 35 60 85 TEMPERATURE (C)
100 0 1.1 2.2 3.3 LOGIC LEVEL (V)
LOGIC THRESHOLD vs. SUPPLY VOLTAGE
MAX4906 toc07
TURN-ON/OFF TIME vs. SUPPLY VOLTAGE
MAX4906 toc08
TURN-ON/OFF TIME vs. TEMPERATURE
V+ = 3.3V 40 tON tON/tOFF (ns) 30
MAX4906 toc09
1 VIH
50
50
0.8 LOGIC THRESHOLD (V)
40 tON tON/tOFF (ns)
0.6
VIL
30
0.4
20 tOFF
20 tOFF
0.2
10
10
O 3.0 3.2 3.4 3.6 SUPPLY VOLTAGE (V)
O 3.0 3.2 3.4 3.6 SUPPLY VOLTAGE (V)
0 -40 -15 10 35 60 85 TEMPERATURE (C)
RISE/FALL-TIME PROPAGATION DELAY vs. SUPPLY VOLTAGE
MAX4906 toc10
RISE/FALL-TIME PROPAGATION DELAY vs. TEMPERATURE
OUTPUT RISE/FALL -TIME DELAY (ps) V+ = 3V 240 TPLH 230
MAX4906 toc11
SAME SWITCH OUTPUT SKEW vs. SUPPLY VOLTAGE
XMAX4906 toc12
250 OUTPUT RISE/FALL -TIME DELAY (ps)
250
10
240 TPLH 230
5 OUTPUT SKEW (ps)
0
220 TPHL 210
220
TPHL
210
-5
200 3 ..0 3.2 3.4 3.6 SUPPLY VOLTAGE (V)
200 -40 -15 10 35 60 85 TEMPERATURE (C)
-10 3.0 3.2 3.4 3.6 SUPPLY VOLTAGE (V)
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5
High-/Full-Speed USB 2.0 Switches MAX4906/MAX4606F/MAX4907/MAX4907F
Typical Operating Characteristics (continued)
(TA = +25C, unless otherwise noted.)
OUTPUT SKEW BETWEEN SWITCHES vs. SUPPLY VOLTAGE
MAX4906 toc13
FREQUENCY RESPONSE
-10 -20 -30 ON-LOSS (dB) -40 -50 -60 -70 OFF-ISOLATION CROSS-TALK ON-LOSS
MAX4906 toc13
10
0
5 OUTPUT SKEW (ps)
0
-5
-80 -90
-10 3.0 3.2 3.4 3.6 SUPPLY VOLTAGE (V)
-100 1 10 100 1000 FREQUENCY (MHz)
TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY
V+ = 3.3V RL = 600
MAX4906 toc15
1
THD+N (%)
0.1
0.01 10 100 1k FREQUENCY (Hz) 10k 100k
6
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High-/Full-Speed USB 2.0 Switches
Pin Description
PIN MAX4906/ MAX4907/ MAX4906F MAX4907F 1 2 3 4 5 6 7 8 9 10 -- 8 -- 2 3 4 5 6 -- -- 7 1 NAME IN SHDN/EN GND COM1 COM2 NO2 NO1 NC2 NC1 V+ SHDN FUNCTION Digital Control Input. IN controls switch 1 and switch 2. Shutdown and Enable Input. Drive SHDN/EN high to consume minimum current and to put the device in high-impedance mode. Drive the SHDN/EN low for normal operation. 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 3.0V to 3.6V supply voltage. Bypass V+ to GND with a 0.1F capacitor. Shutdown Input. Drive SHDN high to put the device into shutdown mode. For normal operation, drive SHDN low.
MAX4906/MAX4606F/MAX4907/MAX4907F
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 ON-LOSS = 20log OUT VIN V CROSSTALK = 20log OUT VIN
MAX4906/MAX4906F NC1 MAX4907/MAX4907F
50 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. ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" 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. On-Loss, Off-Isolation, and Crosstalk _______________________________________________________________________________________ 7
High-/Full-Speed USB 2.0 Switches MAX4906/MAX4606F/MAX4907/MAX4907F
Test Circuits/Timing Diagrams (continued)
10nF V+
V+ COM_
MAX4906/MAX4906F MAX4907/MAX4907F
IN
CAPACITANCE METER f = 1MHz
VIL OR VIH
NC_ or NO_ GND
Figure 2. Channel Off/On-Capacitance
MAX4906/MAX4906F MAX4907/MAX4907F
VN_ NO_ OR NC_
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
0.9 x VOUT
LOGIC INPUT
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
Test Circuits/Timing Diagrams (continued)
MAX4906/MAX4606F/MAX4907/MAX4907F
RS IN+
NC1 OR NO1
MAX4906/MAX4906F MAX4907/MAX4907F
COM1 RL OUT+ RISE-TIME PROPAGATION DELAY = tPHLX OR tPHLY FALL-TIME PROPAGATION DELAY = tPHLX OR tPHLY tSK(O) = |tPHLX - tPHLY| OR |tPHLX - tPHLY| tSK(P) = |tPHLX - tPHLX| OR |tPHLY - tPHLY| OUTRL IN IN VIL TO VIH tINRISE tINFALL
RS IN-
NC2 OR NO2
COM2
V+ VIN+ 0V V+ VIN0V 50% 50% 50% 50% 10%
90%
90% 10%
tOUTRISE tPLHX V+ VOUT+ 0V V+ VOUT0V tPHLY tPLHY 50% 50% 50% 50% 10% tPHLX 90% 90%
tOUTFALL
10%
Figure 4. Output Signal Skew, Rise/Fall Time, Propagation Delay
_______________________________________________________________________________________
9
High-/Full-Speed USB 2.0 Switches MAX4906/MAX4606F/MAX4907/MAX4907F
Test Circuits/Timing Diagrams (continued)
5V 2.5V 3V
VCOM_ tPF tFPR
0V
VPF 2.5V VNO_ VNC_ 1.5V 0V 3V
Figure 5. MAX4906F/MAX4907F Fault-Protection Response/Recovery Time
MAX4906/MAX4906F MAX4907/MAX4907F
RGEN NC_ OR NO_ GND IN
V+ V+ COM_ CL VOUT VOUT IN OFF ON
VOUT
OFF
V GEN
VIL TO VIH
IN
OFF
ON Q = (V OUT )(C L )
OFF
LOGIC INPUT WAVEFORMS INVERTED FOR SWITCHES THAT HAVE THE OPPOSITE LOGIC SENSE.
Figure 6. Charge Injection
Detailed Description
The MAX4906/MAX4906F/MAX4907/MAX4907F analog switches are targeted for USB 2.0 high-speed (480Mbps) switching applications. These devices still meet USB low- and full-speed requirements and are suitable for 10/100 Ethernet switching. The MAX4906/ MAX4906F feature two SPDT switches, while the MAX4907/MAX4907F feature two SPST switches. The MAX4907/MAX4907F switch configurations have a low 7 (max) on-resistance and 7pF (max) on-capacitance.
The MAX4906/MAX4906F/MAX4907/MAX4907F are fully specified to operate from a single +3.0V to +3.6V supply and are available with +5.5V fault protection (MAX4906F/ MAX4907F). When operating from a +3.0V to +3.6V supply, the low threshold of these devices permits them to be used with logic levels as low as 1.4V.The MAX4906/MAX4906F/MAX4907/MAX4907F are based on a charge-pump-assisted n-channel architecture and thus operate at 300A (max) quiescent current. These devices all feature a shutdown input to reduce the quiescent current to less than 2A (max).
10
______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Functional Diagram/Truth Table
V+ SHDN/EN V+ SHDN
MAX4906/MAX4606F/MAX4907/MAX4907F
MAX4906/MAX4906F
IN IN
MAX4907/MAX4907F
NO1 COM1 NC1 NO2 COM2 NC2 NO2 COM2 NO1 COM1
GND
GND
MAX4906/MAX4906F SHDN/EN 0 0 1 IN 0 1 x NO1 NO2 OFF ON OFF NC1 NC2 ON OFF OFF SHDN 0 0 1 1
MAX4907/MAX4907F IN 0 1 0 1 COM1- NO1 COM2- NO1 OFF ON OFF ON
Digital Control Input
The MAX4906/MAX4906F/MAX4907/MAX4907F provide a single-digit control logic input, IN. IN controls the position of the switches as shown in the Functional Diagram/Truth Table. Driving IN rail-to-rail minimizes power consumption. With a +3.0V to +3.6V supply voltage range, these devices are +1.4V logic compatible.
Shutdown Mode
The MAX4906/MAX4906F feature a shutdown mode that reduces the quiescent current supply to less than 2A. Drive SHDN/EN high to place the devices in highimpedance mode. When SHDN/EN is driven low, the devices are normal in operation. The MAX4907/MAX4907F feature a SHDN input that reduces the quiescent current supply to less than 2A. Drive SHDN high to place the devices in low current mode. The devices can be used in low current mode, but with a reduced analog voltage range of 0 < VANALOG < 1.5V and reduced performance. When SHDN is driven low, the MAX4907/MAX4907F are in normal operation.
Analog Signal Levels
The on-resistance of the MAX4906/MAX4906F/ MAX4907/MAX4907F 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.
Applications Information
USB Switching
The MAX4906/MAX4906F/MAX4907/MAX4907F analog switches are fully compliant with the USB 2.0 specification. The low on-resistance and low on-capacitance of these switches make them ideal for high-performance switching applications. The MAX4906/MAX4906F are
11
Overvoltage Fault Protection
The MAX4906F and MAX4907F feature +5.5V fault protection to COM1 and COM2. Fault protection prevents these switches from being damaged due to shorts to the USB bus voltage rail.
______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches MAX4906/MAX4606F/MAX4907/MAX4907F
ASIC I D+ USB TRANSCEIVER
SHARED DATA PINS
DNC1
MAX4906/ MAX4906F
COM1 NO1
VBUS
MAX4907/ MAX4907F
NO1 COM1 USB TRANSCEIVER NO2 COM2
DATA D+ SPI/GPIO DEVICE CLOCK
NC2 ASIC II D+ USB TRANSCEIVER COM2 NO2 DEN TRI-STATE ENABLE
Figure 9. MAX4907/MAX4907F USB/SPI/GPIO Switch
DGND USB CONNECTOR
Ethernet Switching
The wide bandwidth of the MAX4906/MAX4906F/ MAX4907/MAX4907F meets the needs of 10/100 Ethernet switching. These devices 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.
Figure 7. MAX4906/MAX4906F USB Data Routing
MAX4906/ MAX4906F
NC1 COM1 NO1 USB TRANSCEIVER COM2 NO2 USB1USB1+ USB0USB0+
Power-Supply Sequencing
Caution: Do not exceed the absolute maximum ratings because stresses beyond the listed ratings may cause permanent damage to the device. Proper power-supply sequencing is recommended for all CMOS devices. Always apply V+ before applying analog signals, especially if the analog signal is not current limited.
NC2
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.
Figure 8. MAX4906/MAX4906F Switching Between Multiple USB Hosts
ideal for routing USB data lines (see Figure 7) and for applications that require switching between multiple USB hosts (see Figure 8). The MAX4907/MAX4907F can be used in applications that require different data types to share the same pins (see Figure 9); however, the shared device must be capable of going into the tristate mode. The MAX4906F/MAX4907F also feature +5.5V fault protection to guard systems against shorts to the USB bus voltage. The fault-protected versions are recommended for all USB applications.
12
______________________________________________________________________________________
High-/Full-Speed USB 2.0 Switches
Pin Configurations (continued)
PART
Selector Guide
CONFIGURATION Dual SPDT Dual SPDT Dual SPST Dual SPST FAULT PROTECTION NO YES NO YES TOP MARK AAB AAA AAE AAD
MAX4906/MAX4606F/MAX4907/MAX4907F
TOP VIEW
MAX4906ELB
SHDN GND COM1 COM2 1 2 3 4 8 IN V+ NO1 NO2
MAX4906FELB MAX4907ELA MAX4907FELA
MAX4907 MAX4907F
7 6 5
DFN
Chip Information
PROCESS: BiCMOS
Revision History
Pages changed at Rev 2: 1, 2, 3, 7, 11, 14
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13
High-/Full-Speed USB 2.0 Switches MAX4906/MAX4606F/MAX4907/MAX4907F
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
A
1 2
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
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
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.
14 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2007 Maxim Integrated Products is a registered trademark of Maxim Integrated Products. Inc.

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