GN2405A

Product Information
Documentation

Overview

The GN2405A is a quad repeater/re-timer device designed to enhance the reach and robustness of high speed serial links by compensating for transmission losses and re-setting the crosstalk and jitter budget.

The GN2405A features Gennum's proven reference-free CDR architecture which simplifies system design and reduces overall cost. Each channel supports independent locking to data rates from 9.95 - 11.3Gb/s. To enable backward compatibility with legacy data rates, half rate (5Gb/s) and quarter rate (2.5Gb/s) operation is also supported. Other rates can be supported using the re-timer bypass feature.

The GN2405A can be used in multiple applications. It can be used as a CDR in parallel optical modules or in active copper cable assemblies. It’s flexible de-emphasis driver and jitter performance are ideal for use as a line card or backplane repeater.

Features/Highlights

Automatic locking from 9.95Gb/s to 11.3Gb/s
Automatic rate detect for quarter rate (2.5Gb/s) and half rate (5Gb/s) modes
Re-timer bypass up to 11.3Gb/s

Low output jitter

High input jitter tolerance, better than 0.7 UI

No reference clock required

Programmable output, with 400mV to 800mV differential output voltage range

Independent channel operation

De-emphasis to compensate up to 28dB of loss

I²C control interface

Automatically loads configuration data from E²PROM

Loss of signal detect with adjustable threshold

Low power dissipation

Single 3.3V supply

7x7mm, 48-pin QFN package

GN2405A and GN2406 are fully pin compatible

Key Applications

Optical modules and active copper cable assemblies for:
- Infiniband® SDR/DDR/QDR
- 40Gb/s and 100Gb/s Ethernet

Re-timer on line card for:

QSFP modules
Parallel optical modules
SFP+ modules

10Gb/s serial backplane retimer

Ordering Information

Part No	Package
GN2405A-INE3	48 pin QFN

Document	Type	Size
Certificate of Compliance for GN2405A-INE3	Certificate	157 kB
GN2405 & GN2406 Quad 10Gb/s CDR with Transmit De-Emphasis	Brochure	362 kB
Material Composition GN2405AINE3	RoHS Document	15 kB
Optical and IC Products for High Speed Communications	Brochure	2.5 MB

Restricted Downloads

Document	Type	Size
GN2405 Quad 10Gb/s CDR with Input Equalizer & Transmit De-Emphasis	Product Brief	267 kB
Comparison of GN2405 & GN2406 Quad 10Gb/s Devices	Information Note	503 kB
EB-GN2405A User Guide	User Guide	2.5 MB
GN2405/GN2406 Customer Reliability Qualification Report	Reliability Report	108 kB
GN2405A Datasheet	Datasheet	3.4 MB
How to Configure Multiple GN2405/06 CDRs: App Note	Application Note	230 kB
Q1_11 Reliability Monitor Report	Reliability Report	130 kB