SY58038U

Ultra-Precision, 8:1 MUX with Internal

Termination and 1:2 LVPECL Fanout Buffer

Precision Edge

®

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

March 26, 2015

Revision 3.0

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

General Description

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 patented 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 high-speed, Precision Edge

Datasheets and support documentation are available on

Micrel’s web site at: www.micrel.com.

Precision Edge

®

Features

• Selects between 1 of 8 inputs, and provides two precise,

low-skew LVPECL output copies

• Ultra-low jitter design:

− 72fs

• Guaranteed AC performance over temperature and

voltage:

− DC to 4.5Gbps throughput

− <500ps propagation delay IN-to-Q (V

− <100ps t

− <15ps skew (output-to-output)

• Unique, patented, channel-to-channel isolation design

provides superior crosstalk performance

• Unique, patented, input termination and V

DC- and AC-coupled inputs

(CML, PECL, LVDS)

• 800mV LVPECL output swing

• Power supply 2.5V ±5% or 3.3V ±10%

• –40°C to +85°C temperature range

• Available in 44-pin (7mm × 7mm) QFN package

Applications

• Data communication systems

• All SONET/SDH data/clock applications

• All Fibre Channel applications

• All Gigabit Ethernet applications