ASM3P623S00B_1 Datasheet, PDF (1/18 Pages) PulseCore Semiconductor – Timing-Safe™ Peak EMI reduction IC

May 2007
rev 0.4
ASM3P623S00B/C/J/E/F/K
Timing-Safe™ Peak EMI reduction IC
General Features
• Clock distribution with Timing-Safe™ Peak EMI
Reduction
• Input frequency range: 20MHz - 50MHz
• Zero input - output propagation delay
• Low-skew outputs
•
Output-output skew less than 250pS
•
Device-device skew less than 700pS
• Less than 200pS cycle-to-cycle jitter
• Available in 16pin, 150mil SOIC, 4.4mm TSSOP
(ASM3P623S00/E/F/K), and in 8pin, 150 mil
SOIC, 4.4mm TSSOP Packages
(ASM3P623S00B/C/J)
• 3.3V operation
• Industrial temperature range
• Advanced CMOS technology
• The First True Drop-in Solution
Functional Description
ASM3P623S00B/C/J/E/F/K is a versatile, 3.3V zero-delay
buffer designed to distribute high-speed Timing-Safe™
clocks with Peak EMI reduction. ASM3P623S00E/F/K
accepts one reference input and drives out eight low-skew
clocks. It is available in a 16pin package. The
ASM3P623S00B/C/J is the eight-pin version and accepts
one reference input and drives out one low-skew clock.
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.
Multiple ASM3P623S00E/F/K 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.
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.
Refer “Spread Spectrum Control and Input-Output Skew
Table” for deviations and Input-Output Skew for
ASM3P623S00B/C/J and the ASM3P623S00E/F/K devices
The ASM3P623S00B/C/J and the ASM3P623S00E/F/K are
available in two different packages, as shown in the
ordering information table.
Block Diagram
V_DD
SSON SS%
XIN/CLKIN
XOUT
Crystal
Oscillator
Reference
Divider
Feedback
Divider
Modulation
Phase
Detector
Loop
Filter
PLL
VCO
Feedforward
Divider
CLKOUT
GND
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: [phone] • Fax: [phone]
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.