SY58608U

3.2Gbps Precision, 1:2 LVDS Fanout Buffer

with Internal Termination and Fail Safe Input

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

October 2006

M9999-102706-A

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

General Description

The SY58608U is a 2.5V, high-speed, fully differential

1:2 LVDS fanout buffer optimized to provide two

identical output copies with less than 20ps of skew and

clock signals as fast as 2GHz or data patterns up to

3.2Gbps.

The differential input includes Micrel’s unique, 3-pin

input termination architecture that interfaces to LVPECL,

LVDS or CML differential signals, (AC- or DC-coupled)

or termination resistor networks in the signal path. For

AC-coupled input interface applications, an integrated

The outputs are 325mV LVDS, with rise/fall times

guaranteed to be less than 100ps.

The SY58608U operates from a 2.5V ±5% supply and is

guaranteed over the full industrial temperature range (–

40°C to +85°C). For applications that require CML or

LVPECL outputs, consider Micrel’s SY58606U and

SY58607U, 1:2 fanout buffers with 400mV and 800mV

output swings respectively. The SY58608U is part of

Micrel’s high-speed, Precision Edge

Data sheets and support documentation can be found

on Micrel’s web site at: www.micrel.com.

Functional Block Diagram

Precision Edge

®

Features

• Precision 1:2, 325mV LVDS fanout buffer

• Guaranteed AC performance over temperature and

voltage:

– DC-to > 3.2Gbps throughput

– <300ps propagation delay (IN-to-Q)

– <20ps within-device skew

– <100ps rise/fall times

• Fail Safe Input

–

Prevents outputs from oscillating when input is

invalid

• Ultra-low jitter design

• High-speed LVDS outputs

• 2.5V ±5% power supply operation

• Industrial temperature range: –40°C to +85°C

• Available in 16-pin (3mm x 3mm) QFN package

Applications

• All SONET clock and data distribution

• Fibre Channel clock and data distribution

• Gigabit Ethernet clock and data distribution

• Backplane distribution

Markets

• DataCom

• Telecom

• Storage

• ATE

• Test and Measurement