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 digital word through the serial port.

Features

• Pin-for-pin and function compatible with ICD’s version of the 82C404

• Dual programmable graphics clock generator

• Memory and video clocks are individually programmable “on-the-fly”

• Ideal for designs where multiple or varying frequencies are required

• Increased frequency resolution from optional pre-divideby-2 on the M counter

• Output enable feature available for tristating outputs

• Independent clock outputs range from 390 kHz to 120 MHz

• Operation up to 140 MHz available

• Power-down capabilities

• Low-power, high speed 0.8µ CMOS technology

• Glitch-free transitions

• Available in 16-pin PDIP or SOIC package