SY58620L
Precision 4.25Gbps CML Backplane
Transceiver with Integrated Loopback
General Description
The SY58620L is a low jitter, high-speed transceiver
with a variable swing CML transmitter buffer and a CML
high-gain receiver optimized for precision telecom and
enterprise server transmission line and backplane data
management. The SY58620L distributes data to
4.25Gbps guaranteed over temperature and voltage.
Precision Edge®
Features
• Guaranteed AC performance over temperature and
voltage:
- Maximum Throughput 4.25Gbps
- <120ps tr/tf time
• Transmitter
The SY58620L transmitter differential input includes
Micrel’s unique, 3-pin input termination architecture that
directly interfaces to any (AC- or DC-coupled)
differential signal as small as 100mV (200mVPP) without
any termination resistor network in the signal path. The
receiver differential input is optimized to interface
directly to AC-coupled signals as small as 10mV
(20mVPP). The outputs are 50Ω source-terminated CML
with extremely fast rise/fall time.
- Patented input termination directly interfaces to AC-
or DC-coupled differential inputs
- Variable swing CML output
• Receiver
- 32dB high-gain Input
- Internal 50Ω input termination
- Accepts AC-coupled input signals as small as 10mV
(20mVPP)
To support remote self-testing, the SY58620L features a
high-speed loopback test mode. The input control signal
LOOPBACK enables an internal loopback path from the
transmitter input to the receiver output.
- 400mV (800mVPP) differential CML output swing
• Loss-of-Signal (LOS)
The SY58620L operates from a 3.3V ±10% supply and
is guaranteed over the full industrial temperature range
of –40°C to +85°C. The SY58620L is part of Micrel’s
high-speed, Precision Edge® product line.
- High-gain, TTL-compatible LOS output with internal
4.75kΩ pull-up
- Programmable LOS level set
• Ultra-low jitter design
- <5psRMS random jitter
• Patent-pending MUX isolates the receiver and the
transmitter channels minimizing on crosstalk
• Selectable loopback diagnostic mode
• Output enable
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Applications
• Backplane management
• Power supply +3.3V ±10%
• Active cable transceivers
• Industrial temperature range -40°C to +85°C
• Available in 24-pin (4mm x 4mm) MLF™
• SONET/SDH data/clock applications
• 4X Fibre Channel applications
Markets
Typical Applications
• Precision telecom
• Enterprise server
• ATE
• Test and measurement
Precision Edge is a registered trademark of Micrel, Inc.
MLF and MicroLeadFrame are trademarks of Amkor Technology, 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
M9999-093005-B
hbwhelp@micrel.com or (408) 955-1690
September 2005