HD3SS3412_16 Datasheet, PDF (13/27 Pages) Texas Instruments – 4-Channel High-Performance Differential Switch

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9 Detailed Description
HD3SS3412
SLAS828E – FEBRUARY 2012 – REVISED JANUARY 2016
9.1 Overview
The HD3SS3412 is a high-speed passive switch offered in an industry standard 42-pin WQFN package available
in a common footprint shared by several other vendors. The device is specified to operate from a single supply
voltage of 3.3 V over the commercial temperature range of 0°C to 70°C. The HD3SS3412 is a generic 4-CH
high-speed mux/demux type of switch that can be used for routing high-speed signals between two different
locations on a circuit board. Although it was designed specifically to address PCI Express Gen III applications,
the HD3SS3412 will also support several other high-speed data protocols with a differential amplitude of < 1800
mVpp and a common-mode voltage of < 2.0 V, as with USB 3.0 and DisplayPort 1.2. The device’s one select
input (SEL) pin can easily be controlled by an available GPIO pin within a system or from a microcontroller.
9.2 Functional Block Diagram
VDD
B0+
B0-
A0+
C0+
A0-
C0-
SEL
SEL
100kO
B1+
SEL
B1-
A1+
A1-
C1+
C1-
SEL
B2+
B2-
A2+
C2+
A2-
C2-
SEL
B3+
B3-
A3+
A3-
C3+
C3-
GND
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