8 Detailed Description

8.1 Overview

The HD3SS215 is a generic analog, differential passive switch that can work for any high speed interface

applications, as long as it is biased at a common mode voltage range of 0 V to 3.3 V and has differential

signaling with differential amplitude up to 1800 mVpp. It employs adaptive tracking that maintains the high speed

channel impedance over the entire common mode voltage range. In high-speed applications and data paths,

signal integrity is an important concern. The switch offers excellent dynamic performance such as high isolation,

crosstalk immunity, and minimal bit-bit skew. These characteristics allow the device to function seamlessly in the

system without compromising signal integrity. The 2:1/1:2, mux/de-mux device operates with ports A or B

switched to port C, or port C switched to either port A or B. This flexibility allows an application to select between

one of two Sources on ports A and B and send the output to the sink on port C. Similarly, a Source on port C can

select between one of two Sink devices on ports A and B to send the data. To comply with DisplayPort, DP++

and HDMI applications, the HD3SS215 also switches AUX, HPD, and DDC along with the high-speed differential

signals. The HPD and data signals are both switched through the Dx_SEL pin. AUX and DDC are controlled with

AUX_SEL and Dx_SEL. The Functional Modes section contains information on how to set the control pins.

With an OE control pin, the HD3SS215 is operational, with low active current, when this pin is high. When OE is

pulled lowed, the device goes into standby mode and draws very little current in order to save power

consumption in the application.

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HD3SS215, HD3SS215I

SLAS971E – MAY 2014 – REVISED DECEMBER 2020

Copyright © 2020 Texas Instruments Incorporated

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Product Folder Links: HD3SS215 HD3SS215I