SY58626L_10 Datasheet, PDF (1/18 Pages) Micrel Semiconductor – DC-to-6.4Gbps Backplane Transmit Buffer with

SY58626L
DC-to-6.4Gbps Backplane Transmit Buffer with
Selectable Output Pre-emphasis, I/O DC-Offset
Control, and 200mV-3.0V_PP Output Swing
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
with a 3V_PP (1.5V_PK single ended) differential swing.
The SY58626L differential input includes Micrel’s
unique, 3-pin input termination architecture that directly
interfaces to any DC- or AC-coupled, differential signal
as small as 100mV_PK without any termination resistor
networks in the signal path. The outputs are 50Ω
source-terminated CML with a programmable output
swing from 200mV_PP to 3V_PP (100mV_PK to 1.5V_PK).
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^® product line.
Data sheets and support documentation can be found
on Micrel’s website at: www.micrel.com.
Features
Precision Edge^®
• 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
- 50Ω source terminated CML outputs minimize
round-trip reflections
- Programmable output swing control: 200mV-
3.0V_PP
- 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
Precision Edge is a registered trademark of Micrel, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
June 2007
M9999-061207-C
[e-mail] or [phone]