PDF ICS9134-06 Data sheet ( Hoja de datos )

Número de pieza	ICS9134-06
Descripción	(ICS9134-06 / ICS9134-07) 32 kHz Motherboard Frequency Generator
Fabricantes	Integrated Circuit Systems
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No Preview Available ! Integrated Circuit Systems, Inc. ICS9134-06 ICS9134-07 Advance Information 32 kHz 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 mother- boards, 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 pro- duce 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 VDD32 Supply The ICS9134-06 and ICS9134-07 have a separate power sup- ply for the 32.768 kHz oscillator circuitry. This allows the 32 kHz 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 Circuit Systems also offers standard versions, such as that described in this data sheet. Applications Notebook/Palmtop Computers: The ICS9134-06 and ICS9134-07 work with +3.3V and +5V and a single 32.768 kHz crystal, making it the ideal solution for generating clocks in portables with minimum board space. The user can save power by using this single part instead of oscillators or other frequency generators. The ICS9134-06 and ICS9134-07 further reduce the current consumption by having the ability to completely shut down the individual clocks when not in use, while still maintaining the separately powered 32.768 kHz clock. Block Diagram VDD32 32.768 kHz crystal 32.768 kHz Reference Clock Clock Generator 1 14.318 MHz 9134-06 9134-07 RevC111695 Clock Generator 2 CPUCLK Clock Generator 3 Peripheral Clocks Fir is a trademark of Picopower Corporation. 1 page Recommended External Circuit ICS9134-06 ICS9134-07 32.768 kHz crystal VDD VDD 2.2µF (Note 3) 0.1µF 0.1µF Typical 32 kHz Supply Current 0.1µF Notes: 1) The external components shown should be placed as close to the device as possible. 2) Pins 5 and 13 should be connected together externally. One decoupling capacitor may suffice for both pins. 3) May be part of system decoupling. 5 5 Page

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Hoja de datos destacado

Número de pieza	Descripción	Fabricantes
ICS9134-06	(ICS9134-06 / ICS9134-07) 32 kHz Motherboard Frequency Generator	Integrated Circuit Systems
ICS9134-07	(ICS9134-06 / ICS9134-07) 32 kHz Motherboard Frequency Generator	Integrated Circuit Systems

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