SY89537L_10 Datasheet, PDF (1/19 Pages) Micrel Semiconductor – 3.3V Precision LVPECL and LVDS

SY89537L
3.3V Precision LVPECL and LVDS
Programmable Multiple Output Bank Clock
Synthesizer and Fanout Buffer
General Description
The SY89537L integrated programmable clock
synthesizer and fanout is part of a precision PLL-
based clock generation family optimized for enterprise
switch, router, and multiprocessor server applications.
This family is ideal for generating internal system
timing requirements up to 700MHz for multiple ASICs,
FPGAs, and NPUs. These devices integrate the
following blocks into a single monolithic IC:
• PLL (Phase-Lock-Loop) based synthesizer
• Fanout buffers
• Clock generator (dividers)
• Logic translation (LVPECL, LVDS)
• Five independently programmable output
banks
This level of integration minimizes additive jitter and
part-to-part skew associated with discrete alternatives,
resulting in superior system-level timing with reduced
board space and power. For applications that require
a zero-delay function, see the SY89538L.
All support documentation can be found on
Micrel’s web site at: www.micrel.com.
Applications
• Enterprise routers, switches, servers and
workstations
• Parallel processor-based systems
• Internal system clock generation for ASICs, NPUs,
FPGAs
Markets
• LAN/WAN
• Enterprise servers
• Test and measurement
Features
Precision Edge^®
• Integrated programmable synthesizer with multiple
output dividers, fanout buffers, and clock drivers
• Direct interface to crystal: 14MHz to 18MHz
• Input MUX accepts a reference and a crystal
(XTAL) source
– Ideal for reference backup clock source or
system test frequency source
– Patent-pending unique input MUX isolates XTAL
and reference inputs minimizes crosstalk
• Guaranteed AC performance:
– 87.15MHz to 700MHz output frequency range
(with RFCK at 16.6MHz)
– <100ps_PP total jitter
– <7ps_RMS cycle-to-cycle jitter
– <8ps_PP deterministic jitter
– <0.7ps_RMS crosstalk induced jitter
– <50ps bank-to-bank skew
• Output bank synchronization control pin
• LVPECL and LVDS outputs
• TTL/CMOS compatible control logic
• Five independently programmable output
frequency banks:
– Four differential LVPECL output banks
– One differential LVDS output bank with 3 output
pairs
• Separate output enable for each bank
• 3.3V ±10% power supply (2.5V output capable)
• Guaranteed over the commercial and industrial
temperature range (-40C to +85C)
• Available in 44-pin (7mm x 7mm) QFN package
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
December 2007
M9999-121207-B
[e-mail] or [phone]