7 Detailed Description

7.1 Overview

The DS160PR421 is a four channel linear redriver with ingrated multiplexer (mux). The low-power high-

performance linear repeater or redriver is designed to support PCIe 1.0/2.0/3.0/4.0. The device is a protocol

agnostic linear redriver that can operate for interfaces up to 16 Gbps.

The DS160PR421 can be configured two different ways:

Pin Mode – device control configuration is done solely by strap pins. Pin mode is expected to be good enough

for many system implementation needs.

DS160PR421 though writing to its slave address.

7.2 Functional Block Diagram

One of Four 1:2 Demultiplexer Modules

Shared Digital Core

Power-

On Reset

Always-On

10MHz

GAIN/SDA

RX_DET/SCL

Shared Digital

Voltage Regulator

VCC

VREG1,2

GND

CTLE

Control

Driver

Control

RX

Detect

Control

Select

mux

control

RXBnP

RXBnN

CTLE

RXAnP

RXAnN

CTLE

Linear

Driver

TXnP

TXnN

Term

Term

RX Detect

Term

DS160PR421

Redriver Mux 2:1

7.3 Feature Description

7.3.1 Linear Equalization

The DS160PR421 receivers feature a continuous-time linear equalizer (CTLE) that applies high-frequency boost

to help equalize the frequency-dependent insertion loss effects of the passive channel. Table 7-1 shows

available equalization boost through EQ control pins (EQ1 and EQ0), when in Pin Control mode (MODE = L0).

DS160PR421

SNLS686 – FEBRUARY 2021

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