SY89853U

Precision Low-Power Dual 2:1 LVPECL MUX

with Internal Termination

Precision Edge is a registered trademark of Micrel, Inc

Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

August 2007

M9999-082907-C

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

General Description

The SY89853U features two, low jitter 2:1 differential

multiplexers with 100K LVPECL (800mV) compatible

outputs, capable of handling clocks up to 2.5GHz and

data streams up to 2.5Gbps.

The

SY89853U

differential inputs

include

Micrel’s

unique, 3-input termination architecture that allows

users to interface to any differential signal (AC- or DC-

Coupled) as small as 100mV without any level shifting

or termination resistors networks in the signal path. The

result is a clean, stub-free, low jitter interface solution.

The differential 800mV LVPECL outputs have fast

rise/fall times guaranteed to be less than 180ps.

The SY89853U operates from a 2.5V ±5% or a 3.3V

±10% supply, and is guaranteed over the full industrial

temperature range (–40°C to +85°C). For applications

that

require

higher

performance,

consider

the

SY58026U. The SY89853U is part of Micrel's Precision

Edge

®

product family.

All support documentation can be found on Micrel’s web

site at www.micrel.com.

Precision Edge

®

Features

• Dual 2:1 MUX, each channel selects from inputs

• Unique, patent-pending input isolation design

minimizes crosstalk

• Low power 210mW (V

• Guaranteed AC performance over temperature and

voltage:

- DC-to->2.5Gbps data rate throughput

• Ultra-low jitter design:

• Unique, patent-pending 50

Ω input termination and

VT pin accepts DC- and AC-coupled inputs (CML,

LVDS, PECL)

• 800mV LVPECL output swing

• Power supply 2.5V ±5% or 3.3V ±10%

• –40°C to +85°C temperature range

• Available in 32-pin (5mm x 5mm) QFN package

Applications

• Data communication systems

• All SONET OC-3 to OC-48 applications

• All Fibre Channel applications

• All GigE applications

Markets

• LAN/WAN communication

• Enterprise servers

• ATE

• Test and measurement