HD3SS2522 Datasheet, PDF (10/25 Pages) Texas Instruments – USB Type-C SS MUX

HD3SS2522
SLLSEM6B – APRIL 2015 – REVISED AUGUST 2015
7 Detailed Description
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7.1 Overview
HD3SS2522 is a 10-Gbps USB mux with Configuration Channel (CC) logic with DFP support. The HD3SS2522
presents itself as a DFP according to the USB Type-C Spec. The CC logic block monitors the CC1 and CC2 pin
voltages to determine when a USB port has been attached. Once a USB port has been attached, the CC logic
also determines the orientation of the cable and configures the USB SS mux accordingly.
The device provides an VBUS_EN signal to control legacy power switch to provide 5 V to VBUS. The device also
provides IOs needed to support 5 V VCONN sourcing for ecosystems implementing USB Type-C.
Excellent dynamic characteristics of the device allow high speed switching with minimum attenuation to the
signal eye diagram and little added jitter. The device also has low current consumption in Standby mode.
7.2 Functional Block Diagram
5V
VBUS
VCONN
CC_OEn_OUT
CC_OEn_IN
SS_OEn_OUT
SS_OEn_IN
SS_SEL_OUT
SS_SEL_IN
DFP
CC
Controller
MODE_LED
USB
Host
VCC
USB SS Signals
USB SS
MUX
HD3SS2522
USB 2.0 Signals
CC1
CC2
CC_OUT
CC_IN
CC_SEL_OUT
CC_SEL_IN
CRX1
CTX1
CRX2
CTX2
10
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