MAX3781 2.75Gbps Dual Mux/Buffer

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Provides Redundancy for Serial Data Up to 2.7Gbps

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Description

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The MAX3781 is a 2.75Gbps dual multiplexer (mux) and buffer. Each half of the MAX3781 has a transmitter with a fanout of two and a receiver with a 2:1 mux.

Operating from a single +3.3V supply, this device accepts CML or AC-coupled PECL inputs and provides CML outputs. The outputs can be AC-coupled for compatibility with PECL inputs if needed. The MAX3781 is packaged in a compact 48-pin 7x7mm TQFP exposed-paddle package and typically consumes 1.2W power. A power-saving mode disables the unused buffer output and reduces typical power to 0.9W.

Key Features Applications/Uses

11ps Deterministic Jitter
On-Chip Termination Resistors Compatible with 50Ω Transmission Lines at All Ports
1.2W Power Consumption
(0.9W in Power-Saving Mode)
+3.3V Power Supply
Two-Port Integration

2.75Gbps Serial Communications
Serial Backplane Redundancy
System Interconnect Redundancy

Key Specifications: High-Speed Interconnect (Differential Signaling)

Part Number

Features

Rx Signal Type

Tx Signal Type

Functions

Number of Rx

Number of Tx

Data Rates (Mbps)

Propagation Delay (max) (ps)

Supply Voltage (V)

Random Jitter (max) (ps RMS)

Deterministic Jitter (max) (ps pp)

Output Transition Time (max) (ps)

RoHS Available

Package

Smallest Available Package (max w/pins) (mm²)

MAX3781

•	Integrated Input Termination

•	Integrated Output Termination

•	Integrated Splitter/Multiplexer

CML

•	Demultiplexer

•	Multiplexer

2750

500

3.3

135

TQFP/48

See All High-Speed Interconnect (Differential Signaling) (131)

Diagram

MAX3781: Typical Application Circuit
Typical Application Circuit

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Document Ref.: 19-1697; Rev 1; 2000-09-21
This page last modified: 2007-06-05