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General Description

The MAX3831/MAX3832 are 4:1 multiplexers (muxes) and 1:4 demultiplexers (demuxes) with automatic chan

nel assignment. Operating from a single +3.3V supply, the mux receives four parallel, 622Mbps SDH/SONET

channels. These channels are bit interleaved to generate a serial data stream of 2.488Gbps for interfacing to

an optical or an electrical driver. A 10-bit-wide elastic buffer tolerates up to ±7.5ns skew between any parallel

data input and the reference clock. An external 155MHz reference clock is required for the on-chip PLL to synthesize a high-frequency 2.488GHz clock for timing the outgoing data streams.

Features

?+3.3V Single Supply

?1.45W Power Dissipation (MAX3831)

?4-Channel Mux/Demux with Fully Integrated 2.488GHz Clock Generator

?Frame Detection Maintains Channel Assignment

?±7.5ns Elastic Store Range

?2.5ps RMS Serial-Data Output Random Jitter

?8ps Serial-Data Output Deterministic Jitter

?622Mbps LVDS Parallel Input/Output

?2.488Gbps Serial CML Input/Output

?On-Chip Pattern Generator Provides High-Speed BIST

?System Test Flexibility: System Loopback, Line Loopback

?Loss-of-Frame Indicator

Applications

SDH/SONET Backplanes

ATM Switching Networks

High-Speed Parallel Links

Line Extenders

Intrarack/Subrack

Dense Digital Cross

Interconnects

Connects