ICS90C65

Integrated Circuit Systems, Inc. ICS90C65 Dual Voltage Video/Memory Clock Generator Introduction The Integrated Circuit Systems ICS90C65 is a dual clock generator for VGA applications. It simultaneously generates two clocks. One clock is for the video memory, and the other is the video dot clock. The ICS90C65 has been specifically designed to serve the portable PC market with operation at either 3.3V or 5V with a comprehensive power-saving shut-down mode. This data sheet supplies sales order information, a functional overview, signal pin details, a block diagram, AC/DC characteristics, timing diagrams, and package mechanical information. Features Specified for dual voltage operation (VDD=3.3V or 5V), but operates continuously from 3.0V to 5.25V Designed to be powered-down for extended battery life Backward compatibility to the ICS90C64 and ICS90C63 Dual Clock generator for the IBM-compatible Western Digital Imaging Video Graphics Array (VGA) LSI devices, and 8514/A chip sets Integral loop filter components, reduce cost and phase jitter Generates fifteen video clock frequencies (including 25.175 and 28.322 MHz) derived from a 14.318 MHz system clock reference frequency On-chip generation of eight memory clock frequencies Video clock is selectable among the 15 internally generated clocks and one external clock CMOS technology Available in 20-pin PLCC, SOIC and DIP packages Description The Integrated Circuit Systems Video Graphics Array Clock Generator (I...