ICS82C404

Integrated Circuit Systems, Inc. ICS82C404 Advance Information Dual Programmable Graphics Frequency Generator General Description The ICS82C404 is a fully programmable graphics clock generator. It can generate user specified clock frequencies using an externally generated input reference or by a single crystal. The output frequency is programmed by entering a 24-bit www.DataSheet4U.com digital word through the serial port. Two fully user-programmable phase-locked loops are offered in a single package. One PLL is designed to drive the memory clock, while the second drives the video clock. The outputs may be changed on-the-fly to any desired frequency between 390 kHz and 120 MHz. The ICS82C404 is ideally suited for any design where multiple or varying frequencies are required. This part is ideal for graphics applications. It generates low jitter, high speed pixel clocks. It can be used to replace multiple, expensive high speed crystal oscillators. The flexibility of the device allows it to generate non-standard graphics clocks. The leader in the area of multiple clock output clocks on a single chip, ICS has been shipping graphics frequency generators since October, 1990, and is constantly improving the phase-locked loop. The ICS82C404 incorporates a patented fourth generation PLL that offers the best jitter performance available. Features Pin-for-pin and function compatible with ICD’s version of the 82C404 Dual programmable graphics clock generator Me...