SY56020R

Low Voltage 1.2V/1.8V/2.5V CML 1:4

Fanout Buffer 6.4Gbps with Equalization

Precision Edge is a registered trademark of Micrel, Inc.

General Description

The SY56020R is a fully-differential, low-voltage

1.2V/1.8V/2.5V CML 1:4 Fanout Buffer with input

equalization. The SY56020R can process clock signals

as fast as 4.5GHz or data patterns up to 6.4Gbps.

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

termination

architecture

that

interfaces

to

CML

differential

signals,

without

any

level-shifting

or

termination resistor networks in the signal path. The

differential input can also accept AC-coupled LVPECL

and LVDS signals. Input voltages as small as 200mV

transmission line. For AC-coupled input interface

applications, an internal voltage reference is provided to

fast rise/fall times guaranteed to be less than 90ps.

The SY56020R operates from a 2.5V ±5% core supply

and a 1.2V, 1.8V or 2.5V ±5% output supply and is

guaranteed over the full industrial temperature range

(–40°C to +85°C). The SY56020R is part of Micrel’s

high-speed, Precision Edge

Datasheets and support documentation can be found on

Micrel’s web site at: www.micrel.com.

Functional Block Diagram

Precision Edge

®

Features

• 1.2V/1.8V/2.5V CML 1:4 Fanout Buffer

• Equalizes 9, 18, 27 inches of FR4

• Guaranteed AC performance over temperature and

voltage:

– DC-to > 6.4Gbps Data throughput

– DC-to > 4.5GHz Clock throughput

– <280 ps propagation delay (IN-to-Q)

– <15ps within-device skew

– <90ps rise/fall times

• Ultra-low jitter design

• High-speed CML outputs

operation

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

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

Applications

• Data distribution

• SONET clock and data distribution

• Fiber Channel clock and data distribution

• Gigabit Ethernet clock and data distribution

Markets

• Storage

• ATE

• Test and measurement

• Enterprise networking equipment

• High-end servers

• Metro area network equipment

November 2010

M9999-111810-A