SY898531L Datasheet, PDF (1/12 Pages) Micrel Semiconductor – Precision Differential 3.3V Low Skew LVPECL 1:9 Fanout Buffer

SY898531L
Precision Differential 3.3V Low Skew
LVPECL 1:9 Fanout Buffer
General Description
The SY898531L is a 3.3V, low skew, 1:9 LVPECL fanout
buffer with two selectable clock input pairs. Most standard
differential input levels can be applied to the CLK, /CLK
pair while LVPECL, CML, or SSTL input levels can be
applied to the PCLK, /PCLK pair. To eliminate runt pulses
on the outputs during asynchronous assertion/de-assertion
of the clock enable pin, the clock enable is synchronized
with the input signal.
The SY898531L operates from a 3.3V ±5% supply and is
guaranteed over the full industrial temperature range of
0°C to +70°C. The SY898531L is part of Micrel’s high-
speed, Precision Edge^® product line.
Datasheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Functional Block Diagram
Features
Precision Edge^®
∑ Provides nine differential 3.3V LVPECL copies
∑ Selects between differential CLK, /CLK or LVPECL clock
inputs
∑ CLK, /CLK pair accepts LVDS, LVPECL, LVHSTL,
SSTL, HCSL input levels
∑ PCLK, /PCLK pair accepts LVPECL, CML, SSTL input
levels
∑ Guaranteed AC performance over temperature and
supply voltage:
500MHz Maximum output frequency
< 2ns Propagation delay (In-to-Q)
< 50ps Output skew
< 250ps Part-to-part skew
Additive phase jitter, RMS: 0.17ps (typical)
∑ 3.3V ±5% supply voltage
∑ 0°C to +70°C temperature operating range
∑ Available in a 32-pin TQFP package
Applications
∑ SONET clock distribution
∑ Backplane distribution
Markets
∑ LAN/WAN
∑ Enterprise servers
∑ 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
October 2009
M9999-101509-A
[e-mail] or [phone]