ICS9134-07 Datasheet | Integrated Circuit Systems

Integrated Circuit Systems, Inc. ICS9134-06 ICS9134-07 Advance Information 32 k Hz Motherboard Frequency Generator 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 puters. The only external ponents required are a 32.768 k Hz 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 ponents. The chip includes three independent clock generators plus the 32.768 k Hz reference clock to produce all necessary frequencies, including real time clock/DRAM refresh, master clock, CPU clock, keyboard clock, floppy disk controller clock, serial munications 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 k Hz is running on VDD32 Single 32.768 k Hz 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 k Hz 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 VDD32 Supply The ICS9134-06 and ICS9134-07 have a separate power supply for the 32.768 k Hz oscillator circuitry. This allows the 32 k Hz clock to run from a battery or other source while the main power to the chip is disconnected. The VDD32 supply is guaranteed to operate down to +2.0V, with the clock consuming less than 10µA at +3.3V with the main VDD at 0V. The frequencies and power-down options in the ICS9134-06 and ICS9134-07 are mask programmable. Customer specific masks can be made and prototypes delivered within 6-8 weeks from receipt of order. Integrated...