SY58620L Datasheet, PDF (1/18 Pages) Micrel Semiconductor – Precision 4.25Gbps CML Backplane Transceiver with Integrated Loopback

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.
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 (200mV_PP) 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
(20mV_PP). The outputs are 50Ω source-terminated CML
with extremely fast rise/fall time.
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.
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.
All support documentation can be found on Micrel’s web
site at: www.micrel.com.
Applications
• Backplane management
• Active cable transceivers
• SONET/SDH data/clock applications
• 4X Fibre Channel applications
Typical Applications
Features
Precision Edge^®
• Guaranteed AC performance over temperature and
voltage:
- Maximum Throughput 4.25Gbps
- <120ps t_r/t_f time
• Transmitter
- 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
(20mV_PP)
- 400mV (800mV_PP) differential CML output swing
• Loss-of-Signal (LOS)
- High-gain, TTL-compatible LOS output with internal
4.75kΩ pull-up
- Programmable LOS level set
• Ultra-low jitter design
- <5ps_RMS random jitter
• Patent-pending MUX isolates the receiver and the
transmitter channels minimizing on crosstalk
• Selectable loopback diagnostic mode
• Output enable
• Power supply +3.3V ±10%
• Industrial temperature range -40°C to +85°C
• Available in 24-pin (4mm x 4mm) MLF™
Markets
• 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 [phone] • fax + 1 [phone] • http://www.micrel.com
September 2005
M9999-093005-B
[e-mail] or [phone]