HD3SS3412_16 Datasheet, PDF (14/27 Pages) Texas Instruments – 4-Channel High-Performance Differential Switch

HD3SS3412
SLAS828E – FEBRUARY 2012 – REVISED JANUARY 2016
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9.3 Feature Description
The HD3SS3412 has a single control line (SEL Pin) which can be used to control the signal path between Port A
and either Port B or Port C. The one select input (SEL) pin of the device can easily be controlled by an available
GPIO pin within a system or from a microcontroller. The input signal is selected using the SEL pin.
Table 1. Mux Pin Connections⁽¹⁾
PORT A CHANNEL
A0+
A0–
A1+
A1–
A2+
A2–
A3+
A3–
PORT B OR PORT C CHANNEL
CONNECTED TO PORT A CHANNEL
SEL = L
SEL = H
B0+
C0+
B0–
C0–
B1+
C1+
B1–
C1–
B2+
C2+
B2–
C2–
B3+
C3+
B3–
C3–
(1) The HD3SS3412 can tolerate polarity inversions for all differential signals on Ports A, B, and C. Take care to ensure the same polarity is
maintained on Port A versus Port B/C.
9.4 Device Functional Modes
Table 2 lists the functional modes for the HD3SS3412.
Table 2. HD3SS3412 Control Logic
CONTROL PIN (SEL)
L (Default State)
H
PORT A TO PORT B
CONNECTION STATUS
Connected
Disconnected
PORT A TO PORT C
CONNECTION STATUS
Disconnected
Connected
14
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