SY89200U Datasheet, PDF (1/11 Pages) Micrel Semiconductor – Ultra-Precision 1:8 LVDS Fanout Buffer with Three ÷1/÷2/÷4 Clock Divider Output Banks

SY89200U
Ultra-Precision 1:8 LVDS Fanout Buffer
with Three ÷1/÷2/÷4 Clock Divider
Output Banks
General Description
The SY89200U is a 2.5V precision, high-speed, integrated
clock divider and LVDS fanout buffer capable of handling
clocks up to 1.5GHz. Optimized for communications
applications, the three independently controlled output
banks are phase matched and can be configured for pass
through (÷1), ÷2 or ÷4 divider ratios.
The differential input includes Micrel’s unique, 3-pin input
termination architecture that allows the user to interface to
any differential signal path. The low-skew, low-jitter
outputs are LVDS-compatible with extremely fast rise/fall
times guaranteed to be less than 150ps.
The EN (enable) input guarantees that the ÷1, ÷2 and ÷4
outputs will start from the same state without any runt
pulse after an asynchronous master rest (MR) is asserted.
This is accomplished by enabling the outputs after a four-
clock delay to allow the counters to synchronize.
The SY89200U is part of Micrel’s Precision Edge^® product
family.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Functional Block Diagram
Features
Precision Edge^®
• Three low-skew LVDS output banks with programmable
÷1, ÷2 and ÷4 divider options
• Three independently programmable output banks
• Guaranteed AC performance over temperature and
voltage:
– Accepts a clock frequency up to 1.5GHz
– <900ps IN-to-OUT propagation delay
– <150ps rise/fall time
– <50ps bank-to-bank phase offset
• Ultra-low jitter design:
– <1ps_RMS random jitter
– <10ps_PP total jitter (clock)
• Patent-pending input termination and VT pin accepts
DC- and AC-coupled inputs (CML, PECL, LVDS)
• LVDS-compatible outputs
• CMOS/TTL-compatible output enable (EN) and divider
select control
• 2.5V ±5% power supply
• –40°C to +85°C temperature range
• Available in 32-pin (5mm x 5mm) MLF^® package
Applications
• All SONET/SD applications
• All Fibre Channel applications
• All Gigabit Ethernet applications
Precision Edge is a registered trademark of Micrel, Inc
MLF and MicroLeadFrame are registered trademark of Amkor Technology.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel [phone] • fax + 1 [phone] • http://www.micrel.com
March 2007
M9999-030707-D
[e-mail] or [phone]