SY89540U_10 Datasheet, PDF (1/14 Pages) Micrel Semiconductor – Precision Low Jitter 4x4 LVDS Crosspoint

SY89540U
Precision Low Jitter 4x4 LVDS Crosspoint
Switch with Internal Termination
General Description
The SY89540U is a low-jitter, low skew, high-speed
4x4 crosspoint switch optimized for precision telecom
and enterprise server/storage distribution applications.
The SY89540U guarantees data-rates up to 3.2Gbps
over temperature and voltage.
The SY89540U 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 (200mV_pp) without any
level shifting or termination resistor networks in the
signal path. The LVDS compatible outputs maintain
extremely fast rise/fall times guaranteed to be less
than 120ps.
The SY89540U features a patent-pending isolation
design that significantly improves on channel-to-
channel crosstalk performance.
The SY89540U operates from a 2.5V ±5% supply and
is guaranteed over the full industrial temperature range
(–40°C to +85°C). The SY89540U 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.
Typical Performance
Features
Precision Edge^®
• Provides crosspoint switching between any input
pairs to any output pair
• Patent pending, channel-to-channel isolation design
provides superior crosstalk performance
• Guaranteed AC performance over temperature and
voltage:
• DC-to-3.2Gbps throughput
– <480ps propagation delay
– <120ps rise/fall time
– <30ps output-to-output skew
• Ultra-low jitter design:
– <1ps_RMS random jitter
– <10ps_PP deterministic jitter
– <10ps_PP total jitter (clock)
– <0.7ps_RMS crosstalk induced jitter
• Patent pending 50Ω input termination, extended
CMVR, and VT pin accepts DC- and AC-coupled
differential inputs
• 350mV LVDS output swing
• Power supply 2.5V ±5%
• –40°C to +85°C temperature range
• Available in 44-pin (7mm x 7mm) QFN package
• Pb-Free Green package
Applications
• All SONET/SDH channel select applications
• All Fibre Channel multi-channel select applications
• All Gigabit Ethernet multi-channel select
applications
Precision Edge is a registered trademark of Micrel, Inc.
December 2007
M9999-120607-C
[e-mail] or [phone]