ICS1567

Integrated Circuit Systems, Inc. ICS1567 Differential Output Video Dot Clock Generator General Description The ICS1567 is a very high performance monolithic PLL frequency synthesizer. Utilizing ICS’s advanced CMOS mixed-mode technology, the ICS1567 provides a low cost solution for high-end video clock generation, and for telecom system clock generation. The ICS1567 has differential video clock outputs (CLK and CLK) that are compatible with industry standard video DACs & RAMDACs. An additional clock output, LD, is provided, whose frequency is divided down from the main clock by a programmable divider. Operating frequencies are selectable from a pre-programmed (customer-defined) table. An on-chip crystal oscillator for generating the reference frequency is provided on the ICS1567. Programming of the ICS1567 is accomplished via frequency select pins on the package. The ICS1567 has five lines plus a STROBE pin which permits selection of 32 frequencies. Reset of the pipeline delay on Brooktree RAMDACs is automatically performed on a rising edge of the STROBE line. Features High frequency operation for extended video modes - up to 180 MHz Compatible with Brooktree high performance RAMDACs a) Differential output clocks with ECL logic levels b) Programmable divider modulus for load clock c) Circuitry included for automatic reset of Brooktree RAMDAC pipeline delay Low cost - eliminates need for multiple ECL crystal clock oscillators in video display systems Strobed/Transparent ...