ICS2595 Datasheet, PDF (1/12 Pages) Integrated Circuit Systems – User-Programmable Dual High-Performance Clock Generator

Integrated
Circuit
Systems, Inc.
ICS2595
Not recommended for new designs
User-Programmable Dual High-Performance Clock Generator
Description
The ICS2595 is a dual-PLL (phase-locked loop) clock
generator specifically designed for high-resolution, high-
refresh rate, video applications. The video PLL generates
any of 16 pre-programmed frequencies through selection
of the address lines FS0-FS3. Similarly, the auxiliary PLL
can generate any one of four pre-programmed frequencies
via the MS0 & MS1 lines.
A unique feature of the ICS2595 is the ability to redefine
frequency selections in both the VCLK and MCLK synthesiz-
ers after power-up. This permits complete set-up of the
frequency table upon system initialization.
Features
• Advanced ICS monolithic phase-locked loop
technology for extremely low jitter
• Supports high-resolution graphics - VCLK
output to 145 MHz
• Completely integrated - requires only external
crystal (or reference frequency and decoupling)
• Power-down modes support portable computing
• Sixteen selectable VCLK frequencies
(all user re-programmable)
• Four selectable MCLK frequencies
(all user re-programmable)
Applications
• PC Graphics
• VGA/Supper VGA/XGA Applications
Block Diagram
Pin Configuration
20-Pin DIP or SOIC
ICS2595 RevB 3/2/00