General Description

The ICS9134-06 and ICS9134-07 are designed to generate clocks for all 286, 386, 486, Pentium and RISC-based motherboards, including laptops and notebook computers. The only external components required are a 32.768 kHz crystal and decoupling capacitors. The device generates the 14.318 MHz system clock, eliminating the need for a 14.318 MHz crystal. High performance applications may require high speed clock termination components. The chip includes three independent clock generators plus the 32.768 kHz reference clock to produce all necessary frequencies, including real time clock/DRAM refresh, master clock, CPU clock, keyboard clock, floppy disk controller clock, serial communications clock and bus clocks. Different frequencies from clocks #2 can be selected using the frequency select pins, but clock #1 will be at 14.318 MHz for all standard versions.

Features

• IDD <10 µA when 32 kHz is running on VDD32

• Single 32.768 kHz crystal generates all PC motherboard clocks

• 3 independent clock generators

• Generates CPU clocks from 4.0 to 80 MHz

• Up to 5 output clocks

• Separate VDD for 32 kHz clock

• Power-down options available

• Operates from 3.3V or 5.0V supply

• Operates up to 66 MHz at 3.3V

• Supports OPTi 80C463/5 and Firchipsets

• 16-pin, 300-mil, SOIC package