SY56572XR

Low Voltage 1.2V/1.8V/2.5V CML

4:1 MUX with 1:2 FANOUT

6.4Gbps with EQUALIZATION

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

April 2010

M9999-041510-A

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

General Description

The SY56572XR is a fully differential, low voltage

1.2V/1.8V/2.5V CML 4:1 Mux, with input equalization,

and integrated 1:2 Fanout Buffer. The SY56572XR 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 DC-coupled

2.5V/3.3V LVPECL, 1.2V/1.8V/2.5V CML or LVDS

differential signals. For AC-coupled input applications,

an internal voltage reference is provided for input bias.

before the 9, 18 or 27-inch FR4 transmission line.

The SY56572XR 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 SY56572XR 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.

Applications

• Data Distribution

• SONET clock and data distribution

• Fiber Channel clock and data distribution

• Gigabit Ethernet clock and data distribution

Precision Edge

®

Features

• 1.2V/1.8V/2.5V CML 4:2 MUX with input equalization.

• Guaranteed AC performance over temperature and

voltage:

– DC-to > 6.4Gbps throughput

– <360ps propagation delay (IN-to-Q)

– <15ps within-device skew

• Ultra-low jitter design

• 2.5V ±5% , 1.8/1.2V ±5% power supply operation

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

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

Functional Block Diagram