ASM3P4201A Datasheet, PDF (1/7 Pages) PulseCore Semiconductor – Multi-Output Custom Clock Generator

July 2006
rev 0.2
ASM3P4201A
Multi-Output Custom Clock Generator
Features
• Generates five clock outputs from an inexpensive
20MHz crystal or external reference clock.
• Output Frequencies are selectable through select bits
• Generates an EMI optimized clock signal at the output.
• ±1.5% (Typ) Centre Spread for Spread Spectrum Clock
Outputs
• Operates with a 3.3V ± 0.3V Supply Voltage
• Output Clocks disable feature using STBY pin
• Available in 20-pin TSSOP.
Product Description
The ASM3P4201A is a versatile multi output custom
Block Diagram
clock generator. The five high frequency Clock outputs
are generated using an inexpensive 20MHz Crystal or
external reference clock. The accuracy of the 20MHz
Input Clock should be within ±50ppm. The output clocks
consist of a low EMI spread spectrum clock and other
non-spread clocks. Three Select bits choose the
combination of Output Clock Frequency. Refer to the
Output Frequency Selection Table for the values. Output
clocks can be disabled using the STBY pin. The device
operates from a Supply Voltage of 3.3V±0.3V with a
tolerable ripple voltage of 50mV . The device is available
in a 20 pin TSSOP JEDEC package.
S0 S1 S2
VDD
STBY
XIN
XOUT
Crystal
Oscillator
PLL
CLK2
CLK6
CLK1
CLK5
CLK3
CLK4
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.