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M21156

3.2 Gbps 144x144 Crosspoint Switch with Integrated CDR

Overview

Description

Most Highly Integrated, Highest Performance, Lowest Power Crosspoint Switch Reduces System Cost and Complexity

Built on three generations of industry-leading crosspoint switches, the M21156, designed for today’s demanding telecom and datacom applications, is a low-power CMOS, high-speed 144x144 crosspoint switch with 144 independent CDRs, and robust signal conditioning circuits for driving and receiving high-speed signals through backplanes.

The device consumes as low as 17 W of power (typical) with all channels and CDRs operational. In addition, the PowerScaler™ features offer dynamically scalable switch settings to further reduce power consumption.

Each input has a dedicated high-jitter tolerant, low-jitter generation CDR with internal loop filter, which operates independently at any data rate from 1.0 to 1.6 Gbps, or 2.0 to 3.2 Gbps.

The signal conditioning features of the M21156 include per channel programmable input equalizer (IE) and output pre-emphasis (PE) circuits. The IE circuit opens the input data eye in applications where long PCB traces and cables are used. The PE provides a boost of the high frequency content of the output signal, such that the data eye remains open after passing through a long interconnect of PCB traces and cables.

The device supports data rates from 0 to 3.2 Gbps on each channel, allowing any combination of SONET, Fibre Channel (1x, 2x, 10x), InfiniBand, Gigabit Ethernet and parallel 10 Gbps Ethernet traffic. For applications that do not require an integrated CDR, the M21151, 144x144 crosspoint switch with input equalization and pre-emphasis can be used.

Features

Most highly integrated, highest performance crosspoint switch reduces system cost and complexity
Integrated per-channel multi-rate CDRs, with bit rates of 1.0-3.2 Gbps
Programmable input equalizer to remove deterministic jitter (ISI), caused by board traces and cables
Programmable output pre-emphasis for driving long board traces and cables
CDR performance exceeding SONET requirements with 0.65 UI jitter tolerance and 1.5 mUI (rms) jitter generation
Low power consumption of 18 W, nearly 60% power savings compared to an equivalent circuit with external CDRs
PowerScaler™ for further power reduction based on system needs
Built-in system test features such as JitterMeter™ and PRBS Tx/Rx
Supports SONET, GbE, 10GbE, Fibre Channel (1x, 2x, 10x) and Infiniband applications
Programmable input equalization with CDR for random and deterministic jitter reduction

Ordering Information

Part	Description	Package	Pin Count
M21156-11P	144x144 XPT Switch with Input Eq PE	FCBGA	1156
M21156-12P	144x144 XPT Switch with CDR Inp. Eq	FCBGA	1156
M21156-13	144x144 XPT Switch w/CDR Inp. Eq PE IC	FCBGA	1156
M21156-13P	144x144 XPT Switch with CDR Inp. Eq	FCBGA	1156
M21156-23	144x144 XPT Switch w/CDR Inp. Eq PE IC	FCBGA	1156
M21156EVM	M21156EVM	EVM	N/A
M21156G-13	144x144 XPT Switch w/CDR RoHS-IC	FCBGA	1156
M21156G-23	144x144 XPT Switch w/PE & Func.CDRS inCP	FCBGA	1156