ASM3P2855B Datasheet, PDF (1/7 Pages) PulseCore Semiconductor – Custom Clock Generator for Fax System

March 2007
rev 0.2
Custom Clock Generator for Fax System
ASM3P2855B
Features
• Generates Custom Clocks for FAX system from
an inexpensive 24MHz Crystal
• 7 x 50MHz synchronized non-Spread Spectrum
clocks (for CPU, ASIC2, ASIC3, HDD, and PCI
Analyzer, Ethernet, and LAN PHY)
• 1x 50MHz for CPU Timer
Product Description
ASM3P2855B is a part of the two chip custom clock
generator solution for NEC FAX system. Together with
ASM3P2854A, ASM3P2855B realizes all the eighteen
clocks required by the various components and
subsystems of the FAX system. It uses an inexpensive
24MHz crystal as the input to generate five synchronized
50MHz non-spread PCI clocks used by CPU, HDD, PCI
Analyzer, ASIC2 and ASIC3, two non-spread
• 1x 19.52MHz non-spread clock for Scanner
• REFOUT Clock
• Supply Voltage 3.3 V +/- 0.3V
• Available in 16L TSSOP, Green package
• Commercial Temperature operation
synchronized 50MHz clocks for Ethernet and LAN PHY, a
50MHz clock for the CPU Timer, and a 19.52MHz non-
spread clock used by ASIC1 for Scanner. The custom
clock generator ASM3P2855B works with a Supply
Voltage of 3.3V. The device is available in a 16L TSSOP
Green package and in commercial temperature range.
Block Diagram
VDD
VDD_FOUT
XIN / CLKIN
XOUT
Crystal
Oscillator
19.52MHz
PLL
7
50MHz
50MHZ
REFOUT
GND
GND_FOUT
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.