ASM3P2855B

www.DataSheet4U.com August 2007 rev 0.3 Custom Clock Generator for Fax System 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) 1 x 50MHz for CPU Timer ASM3P2855B 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 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 synchronized 50MHz clocks for Ethernet and LAN PHY, a 50MHz clock for the CPU Timer, and a 19.52MHz nonspread 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 19.52MHz XIN / CLKIN Crystal Oscillator PLL 7 50MHz XOUT 50MHZ REFOUT GND GND_FOUT PulseCore Semiconductor Corporation 1715 S. Bascom Ave Suite 200 Campbell, CA 95008 Tel: 408-879-9077 Fax: 408-879-9018 www.pulsecoresemi.com Notice: The i...