July 2005
rev 1.0
ASM3P623S00A/B/C/D/E/F
Zero Cycle Slip Peak EMI reduction IC
General Features
All parts have on-chip PLLs that lock to an input clock on
the CLKIN pin. The PLL feedback is on-chip and is
obtained from the CLKOUT pad, internal to the device.
Input frequency range: 20MHz - 50MHz.
Zero input - output propagation delay.
Low-skew outputs.
Multiple ASM3P623S00D/E/F devices can accept the same
input clock and distribute it. In this case, the skew between
the outputs of the two devices is guaranteed to be less than
700pS.
Output-output skew less than 250pS.
Device-device skew less than 700pS.
Less than 200pS cycle-to-cycle jitter is compatible
with Pentium® based systems.
Available in 16pin, 150mil SOIC, 4.4mm TSSOP
(ASM3P623S00D/E/F), and in 8pin, 150 mil SOIC,
4.4mm TSSOP Packages (ASM3P623S00A/B/C).
3.3V operation
All outputs have less than 200pS of cycle-to-cycle jitter.
The input and output propagation delay is guaranteed to be
less than 250pS, and the output-to-output skew is
guaranteed to be less than 250pS.
Advanced 0.35µ CMOS technology.
The First True Drop-in Solution.
Please refer “Differential Cycle Slips and Spread Spectrum
Control Table” for deviations and differential Cycle Slips
for ASM3P623S00A/B/C and the ASM3P623S00D/E/F
devices
Functional Description
ASM3P623S00D/E/F is a versatile, 3.3V zero-delay buffer
designed to distribute high-speed clocks. It accepts one
reference input and drives out eight low-skew clocks. It is
available in a 16pin package. The ASM3P623S00A/B/C is
the eight-pin version of the ASM3P623S00. It accepts one
reference input and drives out one low-skew clock.
The ASM3P623S00A/B/C and the ASM3P623S00D/E/F
are available in two different configurations, as shown in
the ordering information table.
Block Diagram
VDD
SS%
SSON
PLL
Modulation
Reference
CLKIN
Feedforward
Divider
Phase
Loop
VCO
Feedback
CLKOUT
VSS
Alliance Semiconductor
2575 Augustine Drive • Santa Clara, CA • Tel: 408.855.4900 • Fax: 408.855.4999 • www.alsc.com
Notice: The information in this document is subject to change without notice.