SY58038U_15 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – Ultra-Precision, 8:1 MUX with Internal Termination and 1:2 LVPECL Fanout Buffer

SY58038U
Ultra-Precision, 8:1 MUX with Internal
Termination and 1:2 LVPECL Fanout Buffer
Precision Edge^®
General Description
The SY58038U is a low-jitter, low-skew, high-speed 8:1
multiplexer with a 1:2 differential fanout buffer optimized
for precision telecom and enterprise server distribution
applications. The SY58038U distributes clock frequencies
from DC to 3.5GHz, and data rates to 4.5Gpbs guaranteed
over temperature and voltage.
The SY58038U differential input includes Micrel’s unique,
3-pin input termination architecture that directly interfaces
to any differential signal (AC- or DC-coupled) as small as
100mV without any level shifting or termination resistor
networks in the signal path. The outputs are 800mV, 100K
compatible LVPECL with extremely fast rise/fall times
guaranteed to be less than 100ps.
The SY58038U features a patented isolation design that
significantly improves channel-to-channel crosstalk
performance.
The SY58038U operates from a 2.5V ±5% or 3.3V ±10%
supply and is guaranteed over the full industrial
temperature range of –40°C to +85°C. The SY58038U is
part of Micrel’s high-speed, Precision Edge^® product line.
Datasheets and support documentation are available on
Micrel’s web site at: www.micrel.com.
Precision Edge^®
Features
• Selects between 1 of 8 inputs, and provides two precise,
low-skew LVPECL output copies
• Ultra-low jitter design:
− 72fs_rms phase jitter (typical)
• Guaranteed AC performance over temperature and
voltage:
− DC to 4.5Gbps throughput
− <500ps propagation delay IN-to-Q (V_IN > 100mV)
− <100ps t_r / t_f time
− <15ps skew (output-to-output)
• Unique, patented, channel-to-channel isolation design
provides superior crosstalk performance
• Unique, patented, input termination and V_T pin accepts
DC- and AC-coupled inputs
(CML, PECL, LVDS)
• 800mV LVPECL output swing
• Power supply 2.5V ±5% or 3.3V ±10%
• –40°C to +85°C temperature range
• Available in 44-pin (7mm × 7mm) QFN package
Applications
• Data communication systems
• All SONET/SDH data/clock applications
• All Fibre Channel applications
• All Gigabit Ethernet applications
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
March 26, 2015
Revision 3.0
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