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SuperLite™

SY55859L

Micrel, Inc.

M9999-110705

hbwhelp@micrel.com or (408) 955-1690

DESCRIPTION

s Pin-for-pin, plug-in compatible to the MAX3840

s Supply voltage operation: +3.3V

s Low jitter:

s Power saving output disable feature

s 15ps channel-to-channel skew

s Fast CML outputs: <100ps t

s Available in a small (5mm x 5mm) 32-pin EPAD-

MLF™ package

FEATURES

3.3V, 2.7Gbps

DUAL 2X2 CROSSPOINT SWITCH

SuperLite™

SY55859L

APPLICATIONS

s SONET/SDH optical transport

s High-speed backplane redundancy

s Add-drop multiplexers

Rev.: C

Amendment: /0

Issue Date:

November 2005

The SY55859L is a dual CML 2x2 crosspoint switch

optimized for high-speed data and/or clock applications (up

to 2.7Gbps or 2.7GHz) where low jitter and skew are critical.

This device is pin-for-pin, plug-in compatible to the MAX3840.

Each 2x2 of the SY55859L routes any input to any output,

and thus can distribute or multiplex a clock or data stream.

The I/O architecture is fully differential and CML compatible.

Both inputs and outputs are optimized for 50

Ω transmission

lines.

The inputs (DA 0-1 and DB 0-1) are internally

terminated with 50

Ω, thus eliminating external termination,

and the outputs (QA0-1 and QB0-1) include 50

Ω source

termination.

Furthermore, a power-saving output enable

feature is provided which powers-down unused outputs.

The SY5859L operates from a +3.3V

±10% supply, and

is guaranteed over the industrial (–40

°C to +85°C)

temperature range. It is available in a 32-pin (5mm x 5mm)

MLF™ package.

For applications that require either lower voltage operation

or a more flexible input interface (for applications such as

AC–coupled LVPECL inputs), consider the SY55858U.

TYPICAL APPLICATIONS CIRCUIT

TYPICAL PERFORMANCE

Laser

Driver

Data

Clock

Limiting

Amplifier

CDR

Limiting

Amplifier

CDR

Data

Clock

SY55859L

Laser

Driver

Micrel Semiconductor

Maxim

SY55859LMI

MAX3840EGJ

CROSS REFERENCE TABLE

TIME (50ps/div.)

SuperLite is a trademarks of Micrel, Inc.

MicroLeadFrame and MLF are trademarks of Amkor Technology, Inc.

SuperLite™