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SY58626L
DC-to-6.4Gbps Backplane Transmit Buffer with
Selectable Output Pre-emphasis, I/O DC-Offset
Control, and 200mV-3.0VPP Output Swing
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
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 3VPP (1.5VPK 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 100mVPK without any termination resistor
networks in the signal path. The outputs are 50
source-terminated CML with a programmable output
swing from 200mVPP to 3VPP (100mVPK to 1.5VPK).
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
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
source terminated CML outputs minimize
round-trip reflections
-
Programmable output swing control: 200mV-
3.0VPP
-
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