Datasheet

MAX4906EF
High-/Full-Speed USB 2.0 Switches
with High ESD
Pin Description
PIN NAME FUNCTION
1 IN Digital Control Input. IN controls switch 1 and switch 2.
2 Q P Charge-Pump Enable Input. Drive QP high to turn charge pump off. For normal operation, drive QP low.
3 GND Ground
4 COM1 Analog Switch 1—Common Terminal
5 COM2 Analog Switch 2—Common Terminal
6 NO2 Analog Switch 2—Normally Open Terminal
7 NO1 Analog Switch 1—Normally Open Terminal
8 NC2 Analog Switch 2—Normally Closed Terminal
9 NC1 Analog Switch 1—Normally Closed Terminal
10 V+
Positive-Supply Voltage Input. Connect V+ to a +2.7V to +3.6V supply voltage. Bypass V+ to GND with a
0.1µF capacitor.
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.
+3.3V
V
OUT
V+
IN_
NC1
COM1
NO1*
V
IN
MAX4906EF
OFF-ISOLATION = 20log
V
OUT
V
IN
CROSSTALK = 20log
V
OUT
V
IN
NETWORK
ANALYZER
50Ω
50Ω 50Ω
50Ω
MEAS REF
10nF
0V OR V+
50Ω
GND
*FOR CROSSTALK THIS PIN IS NO2.
NC2 AND COM2 ARE OPEN.
Test Circuits/Timing Diagrams
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Figure 1. Off-Isolation and Crosstalk