SY58621L_10 Datasheet, PDF (1/20 Pages) Micrel Semiconductor – Precision 3.2Gbps CML/LVPECL Backplane

SY58621L
Precision 3.2Gbps CML/LVPECL Backplane
Transceiver with Integrated Loopback
General Description
The SY58621L is a low jitter, high-speed transceiver
with a variable swing LVPECL transmitter buffer and a
CML high-gain receiver optimized for precision telecom
and enterprise server transmission line and backplane
data management. The SY58621L distributes data to
3.2Gbps guaranteed over temperature and voltage.
The SY58621L transmitter differential input includes
Micrel’s unique, patented 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 receiver output is 50_
source-terminated CML and the transmitter output is
variable swing 80mV to 800mV LVPECL with extremely
fast rise/fall time.
To support remote self-testing, the SY58621L 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 SY58621L operates from a 3.3V ±10% supply and
is guaranteed over the full industrial temperature range
of –40°C to +85°C. The SY58621L is part of Micrel’s
high-speed, Precision Edge^® product line. For
applications that requires a CML receiver and
transmitter, consider the SY58620L.
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
Features
Precision Edge^®
∑ Guaranteed AC performance over temperature and
voltage:
- Maximum Throughput 3.2Gbps
- <160ps t_r/t_f time
∑ Transmitter
- Patented input termination directly interfaces to AC-
or DC-coupled differential inputs
- Variable swing LVPECL 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 enables on transmitter and receiver outputs
∑ Power supply +3.3V ±10%
∑ Industrial temperature range -40°C to +85°C
∑ Available in 24-pin (4mm x 4mm) QFN
Markets
∑ Precision telecom
∑ Enterprise server
∑ ATE
∑ Test and measurement
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
January 2006
M9999-012006-B
[e-mail] or [phone]