Datasheet > GX79474

GX79474

更新时间： 2025-07-18 17:01:03

品牌	Logo	应用领域
瑞萨 - RENESAS		/
页数	文件大小	规格书
2页	119K
描述
4 x 96Gbaud Linear Differential I/O Driver

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GX79474 数据手册

Short-Form Datasheet

GX79474

4 × 96Gbaud Linear Differential I/O Driver

The GX79474 is a low-power, high-performance,

quad-channel linear driver chip designed for

800Gbps and beyond optical integrated transmitter

small-form factor (SFF) modules for metro and long-

haul applications.

Features

■

> 70GHz 3dB E/O bandwidth

■

> 10dB dynamic range of gain control

< 2.0W (typical) power consumption for 2.0Vppd

output voltage swing

The GX79474 integrates analog control and digital

(through an SPI interface) control circuitry for

precise, independent driving level control and

monitoring. Each driver channel has 100Ω differential

AC-coupled input and 60Ω differential interface with

an open collector type output stage, suitable for InP

based and Silicon Photonics based Mach-Zehnder

modulators.

■

AC-coupled 100Ω differential input

Open-collector configuration output stage which

can drive DC-coupled 60Ω differential

■

Ultra-low inter-channel cross-talk

Up to 15dB of peaking to compensate for package

and modulator losses

■

Precise analog and digital monitoring and control

of gain and output voltage swing

Applications

■

< 1MHz low-frequency cutoff

■

800G and beyond advanced multi-level QAM

Optical Internetworking Forum (OIF)-compliant

Serial Peripheral Interface (SPI) for

programmability

modulation systems

■

High-bandwidth SFF optical integrated modules

Pilot

VDCout

PK_GC1234

GC_OA1234

X=4

X=3

In4p

In4n

Out4p

Out4n

X=2

X=1

Out3p

Out3n

In3p

In3n

Pilot Tone Mode Control

Peak Detector

Gain Control

Vout DC

Out2p

Out2n

In2p

In2n

Level

Monitor

In1p

Out1p

Out1n

In1n

Peak

Control

ADC

DAC

Temp.

SPI Control

Monitor

TERM_CH1, 2, 3, 4

Temp

RST MISO MOSI CS CLK VCC

Figure 1. Block Diagram

R08DO0018EU0100 Rev.1.00

Sep 28, 2023

Page 1

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