HD3SS214 Datasheet, PDF (10/25 Pages) Texas Instruments – 8.1 Gbps DisplayPort 1.3 2:1/1:2 Differential Switch

HD3SS214
SLAS907 – DECEMBER 2015
www.ti.com
Feature Description (continued)
8.3.2 HPD, AUX, and DDC Switching
HPD, AUX, and DDC switching is supported through the HD3SS214. This enables the device to work in multiple
application scenarios within multiple electrical standards. The AUXA/B and DDCA/B lines can both be switched
to the AUXC port. This feature supports DP++ or AUX only adapters. For HDMI applications, the DDC channels
are switched to the DDC_C port only and the AUX channel can remain active or the end user can make it float.
8.3.3 Output Enable and Power Savings
The HD3SS214 has two power modes, active/normal operating mode, and standby mode. During standby mode,
the device consumes very little current to save the maximum power. To enter standby mode, the OE control pin
is pulled low and must remain low. For active/normal operation, the OE control pin should be pulled high to VDD
through a resistor.
8.4 Device Functional Modes
The HD3SS214 behaves as a two to one or one to two using high bandwidth pass gates. The input ports are
selected using the Dx_SEL pin and Dx_SEL pin which are shown in Table 1.
Table 1. AUX/DDC Switch Control Logic⁽¹⁾
CONTROL LINES
AUX_S
EL
Dx_SEL
DCz(p) Pin
z = 0, 1 ,2 or 3
L
L
DAz(p)
DCz(n) Pin
z = 0, 1 ,2 or 3
DAz(n)
L
H
DBz(p)
DBz(n)
H
L
DAz(p)
DAz(n)
H
H
DBz(p)
DBz(n)
M⁽²⁾
L
DAz(p)
DAz(n)
M⁽²⁾
H
DBz(p)
DBz(p)
HPDC Pin
HPDA
HPDB
HPDA
HPDB
HPDA
HPDB
SWITCHED I/O PINS⁽²⁾
AUXA
AUXB
To/From AUXC
Z
Z
To/From AUXC
Z
Z
Z
Z
To/From AUXC
Z
Z
To/From AUXC
AUXC
To/From
AUXA
To/From
AUXB
To/From
DDCA
To/From
DDCB
To/From
AUXA
To/From
AUXB
DDCA
DDCB
DDCC
Z
Z
Z
Z
Z
Z
To/From
AUXC
Z
Z
Z
To/From AUXC
Z
To/From
DDCC
Z
To/From DDCA
Z
To/From DDCC To/From DDCB
(1) OE pin - For normal operation, drive OE high. Driving the OE pin low will disable the switch. Note: The ports which are not selected by
the control lines will be in high impedance status.
(2) Z = High Impedance
10
Submit Documentation Feedback
Product Folder Links: HD3SS214
Copyright © 2015, Texas Instruments Incorporated