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