Datasheet > ICS9133X

ICS9133X

更新时间： 2024-09-16 22:57:15

品牌	Logo	应用领域
矽成 - ICSI		/
页数	文件大小	规格书
8页	147K
描述
32 kHz Motherboard Frequency Generator

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数据手册

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ICS9133X 数据手册

ICS9133X

Integrated

Circuit

Systems, Inc.

32 kHz Motherboard Frequency Generator

Features

General Description

TheICS9133Xis designed to generate clocks for all 286, 386,

486, Pentium and RISC-based motherboards, including lap-

tops and notebook computers. The only external components

required are a 32.768 kHz crystal and decoupling capacitors.

Thedevicegeneratesthe14.318MHzsystemclock, eliminating

theneedfora14.318MHzcrystal.Highperformanceapplications

may require high speed clock termination components. The

chip includes three independent clock generators plus the

32.768kHzreferenceclocktoproduceallnecessaryfrequencies,

including real time clock/DRAM refresh, master clock, CPU

clock, twice CPUclock frequency, keyboard clock, floppy

disk controller clock, serial communications clock and bus

clocks. Different frequencies from clock #2 can be selected

using the frequency select pins, but clock #1 will be at 14.318

MHz for all standard versions.

•

Single 32.768 kHz crystal generates all PC

motherboard clocks

•

Cost-reduced version of popular ICS9132

Contains internal crystal load capacitors and

feedback bias

•

3 independent clock generators

Generates CPU clocks from 12.5 to 100 MHz

Up to 7 output clocks

Separate VDD for 32 kHz clock

Output enable tristates outputs

Power-down options available

Operates from 3.3V or 5.0V supply

Operates up to 66 MHz at 3.3V

Skew controlled 1X and 2X CPU clocks

20-pin PDIP or SOIC package

VDD32 Supply

Applications

The ICS9133X has a separate power supply 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.

Notebook/Palmtop Computers: The ICS9133X works with

+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

ICS9133Xfurther reduces 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.

The frequencies and power-down options in the ICS9133X

are mask programmable. Customer specific masks can be

made and prototypes delivered within 6-8 weeks from receipt

oforder.IntegratedCircuitSystemsalsooffersstandard versions,

such as that described in this data sheet.

Block Diagram

9133X Rev A 052897P

ICS reserves the right to make changes in the device data identified in this publication

without further notice. ICS advises its customers to obtain the latest version of all device

data to verify that any information being relied upon by the customer is current and accurate.

12 3 4 5 6 7 8

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与ICS9133X相关器件

型号	品牌	获取价格	描述	数据表
ICS9133X-01CN20	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDIP20, PLASTIC, DIP-20
ICS9133X-01CN20-LF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDIP20, PLASTIC, DIP-20
ICS9133X-01CN20W	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDIP20, 0.600 INCH, PLASTIC, DIP-20
ICS9133X-01CN20W-LF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDIP20, 0.600 INCH, PLASTIC, DIP-20
ICS9133X-01CW20	ICSI	获取价格	32 kHz Motherboard Frequency Generator
ICS9133X-01CW20LF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, PDIP20, PLASTIC, DIP-20
ICS9133X-01CW20W	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDIP20, 0.600 INCH, PLASTIC, DIP-20
ICS9133X-01CW20W-LF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDIP20, 0.600 INCH, PLASTIC, DIP-20
ICS9133XM20	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO20, SOIC-20
ICS9133XM20-LF	IDT	获取价格	Processor Specific Clock Generator, 100MHz, CMOS, PDSO20, SOIC-20

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