NCN9252_11 Datasheet, PDF (6/9 Pages) ON Semiconductor – High-Speed USB 2.0 (480 Mbps) DP3T Switch for USB/UART/Data Multiplexing

NCN9252
Detailed Description
The NCN9252 is a DP3T switch designed for applications
where a single USB connector is used for multiple data
applications within a portable system. Two differential
signals from a USB connector can be routed to 3 different
end locations. The first, channel 1, is optimized for a
high−speed, USB 2.0 transceiver. The second and third,
channels 2 and 3, are optimized for UART or remote data
applications.
Control Inputs Select Logic
The NCN9252 is made up of two, triple−throw switches
operating off of the same internal enable signal. For each
switch, a signal can pass from the common pin to any of
three terminals. Whenever COM1 is closed to terminal 1S2,
COM2 will respectively be closed to terminal 2S2. The
select logic is controlled by two inputs, IN1 and IN2,
connecting the common pins to the terminals according to
the function table found on page 2. Since there are four
possible control states but only 3 possible terminals, the first
combination results in a open connection for all three
terminals.
V_IH and V_IL Levels
200
190
180
170
160
V_CC = 4.2 V
150
140
130
120
110
100
90 _{VCC = 3.3 V}
80
70
60
50
40
30
20
V_CC =
2.7 V
10
0
0 0.4 0.8 1.2 1.6 2.0 2.4 2.8 3.2
V_IN (V)
Figure 3. I_CC Leakage Current vs. V_IN
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