1

SY58038U

Micrel, Inc.

M9999-020707

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

DESCRIPTION

■ Selects between 1 of 8 inputs, and provides 2

precision, low skew LVPECL output copies

■ Guaranteed AC performance over temperature and

voltage:

• DC to 4.5Gbps throughput

• <15ps skew (output-to-output)

■ Unique, patent-pending, channel-to-channel

isolation design provides superior crosstalk

performance

■ Ultra-low jitter design:

■ Unique, patent-pending, input termination and VT

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

LVDS)

■ 800mV LVPECL output swing

■ Available in 44-pin (7mm ×

×

×

×

FEATURES

ULTRA PRECISION 8:1 MUX

WITH INTERNAL TERMINATION AND

1:2 LVPECL FANOUT BUFFER

SY58038U

APPLICATIONS

■ Data communication systems

■ All SONET/SDH data/clock applications

■ All Fibre Channel applications

■ All Gigabit Ethernet applications

Rev.: C

Amendment: /0

Issue Date:

February 2007

The SY58038U is a low jitter, low skew, high-speed 8:1

multiplexer with a 1:2 differential fanout buffer optimized for

precision telecom and enterprise server distribution

applications. The SY58038U distributes clock frequencies

from DC to 3.5GHz, and data rates to 4.5Gpbs guaranteed

over temperature and voltage.

The SY58038U differential input includes Micrel’s unique,

3-pin input termination architecture that directly interfaces

to any differential signal (AC- or DC-coupled) as small as

100mV without any level shifting or termination resistor

networks in the signal path. The outputs are 800mV, 100K

compatible LVPECL with extremely fast rise/fall times

guaranteed to be less than 100ps.

The SY58038U features a patent-pending isolation design

that significantly improves channel-to-channel crosstalk

performance.

The SY58038U operates from a 2.5V ±5% or 3.3V ±10%

supply and is guaranteed over the full industrial temperature

range of –40°C to +85°C. The SY58038U is part of Micrel’s

Data sheets and support documentation can be found on

Micrel’s web site at www.micrel.com.

Precision Edge is a registered trademark of Micrel, Inc.

MLF and

MicroLeadFrame are registered trademarks of Amkor Technology, Inc.