SY58626L

DC-to-6.4Gbps Backplane Transmit Buffer with

Selectable Output Pre-emphasis, I/O DC-Offset

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

June 2007

M9999-061207-C

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

General Description

The SY58626L high-speed, low jitter transmit buffer is

optimized for backplane and transmission line data-path

management applications in Automatic Test Equipment

(ATE) and Test & Measurement (T&M) systems. The

buffer includes a CML compatible, variable swing output

with selectable pre-emphasis.

The SY58626L is

capable of driving serial data from DC through 6.4Gbps

The

SY58626L

differential

input

includes

Micrel’s

unique, 3-pin input termination architecture that directly

interfaces to any DC- or AC-coupled, differential signal

networks in the signal path. The outputs are 50

Ω

source-terminated CML with a programmable output

The SY58626L includes an output stage that provides 4

levels of pre-emphasis. The output pre-emphasis level is

programmed with a three-bit interface.

Unlike other

transmitter solutions, the output pre-emphasis duration

can be programmed from 60ps to 400ps.

The SY58626L operates at 3.3V ±10% supply and is

guaranteed over the commercial temperature range of

0°C to +70°C. The SY58626L transmitter is optimized to

work with the SY58627L receiver. The SY58626L is part

of Micrel’s high-speed, Precision Edge

Data sheets and support documentation can be found

on Micrel’s website at: www.micrel.com.

Precision Edge

®

Features

• Transmit driver provides output pre-emphasis to

extend transmission range

• 4 selectable pre-emphasis levels

• Drives 6.4Gbps up to 12 FR4 PCB trace, or longer

combinations of FR4+cable+interconnect

• DC through 6.4Gbps data rate throughput

• Integrated loopback capability

• Unique pre-emphasis:

-

Programmable pre-emphasis magnitude

-

Programmable pre-emphasis duration

• Unique, flexible I/O:

-

Internal termination to VTTIN pin interfaces to any

differential AC- or DC-coupled signals

-

50

Ω source terminated CML outputs minimize

round-trip reflections

-

Programmable output swing control: 200mV-

-

Output Disable and output shutdown

-

DC-offset control with VTT I/O

• 3.3V ±10% supply voltage

• 0°C to +70°C temperature range

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

Applications

• ATE, T&M backplane management

• Combination FR4+cable+interconnect driver

• Cable drivers

• Electrical interface and interconnect applications that

require DC-offset control