W48C55A

A W48C54A/55A Frequency Synthesizers Features Proprietary crystal oscillator circuitry provides low REFOUT jitter, excellent duty cycle Power-on delay feature ensures full VDD is reached prior to output activation 3.3V and 5V operation supported including the VRE (Voltage Regulated Extended) specification for Pentium® processor Pin and function compatible with AV9154/AV9155 Integral PLL loop filter components ensures stable PLL operation in noisy system environment Block Diagram Smooth frequency transition of CPU and 2XCPU outputs Compatible with Intel X86 and other high-performance processors Up to eight outputs for CPU and peripherals Supports Green PC and notebook designs Custom options available with metal layer change High-performance, low-power CMOS Available in 16- (150-mil) and 20-pin SOIC package (300-mil) Pin Configurations 14.318 MHz Xtal X1 X2 VDD XTAL OSC PD PLL1 14.318 MHz Fixed Outputs NC 1 16 NC X2 2 15 47.059MHz X1 3 14 NC W48C54A-08 VDD 4 13 VDD GND 5 12 GND NC 6 11 REF(20MHz) 32MHz 7 10 NC GND 8 9 OE FS2:0 PLL2 2XCPU CPU GND OE FS0 1 16 FS1 W48C54A-05, 09 X2 2 15 CPU X1 3 14 NC VDD 4 13 VDD GND 5 12 GND 40MHz 6 11 REF(20MHz) 32MHz 7 10 NC GND 8 9 OE 1.843MHz 1 16 FS1 X2 2 15 FS0 W48C54A-59 X1 3 14 CPU VDD 4 13 VDD GND 5 12 GND 24MHz 6 11 14.318MHz 12MHz 7 10 PD GND 8 9 OE Intel and Pentium are registered trademarks of Intel Corporation. 1.843MHz X2 X1 VDD GND 16MHz 24MHz 12MHz GND 0E ...