Datasheet

MAX4899E/MAX4899AE
USB 2.0 High-Speed, Fault-Tolerant 3:1, 4:1
Multiplexers
6 _______________________________________________________________________________________
Test Circuits/Timing Diagrams
MEASUREMENTS ARE STANDARDIZED AGAINST SHORT AT SOCKET TERMINALS.
OFF-ISOLATION IS MEASURED BETWEEN COM_ AND "OFF" USB_ TERMINAL ON EACH SWITCH.
ON-LOSS IS MEASURED BETWEEN COM_ AND "ON" USB_ TERMINAL ON EACH SWITCH.
CROSSTALK IS MEASURED FROM ONE USB_ CHANNEL TO ANOTHER USB_ CHANNEL.
SIGNAL DIRECTION THROUGH SWITCH IS REVERSED; WORST VALUES ARE RECORDED.
V+
V
OUT
V
IN
GND
V+
V
IN
V
OUT
MEAS.
NETWORK
ANALYZER
50Ω 50Ω
50Ω
OFF-ISOLATION = 20log
ON-LOSS = 20log
CROSSTALK = 20log
50Ω
REF.
C
1
V
OUT
V
IN
V
OUT
V
IN
C
0
CHANNEL
SELECT
EN
QP
USB_
COM_
0.1μF
MAX4899E
MAX4899AE
Figure 1. Off-Isolation, On-Loss, and Crosstalk
V+
GND
V+
C
1
C
0
CHANNEL
SELECT
1MHz
CAPACITANCE
ANALYZER
USB_,
COM_
MAX4899E
MAX4899AE
EN
QP
Figure 2. Channel Off-/On-Capacitance