AV9158-07 데이터 시트보기 (PDF) - Integrated Circuit Systems

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AV9158-07

Frequency Generator and Integrated Buffer

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS9158-07

Frequency Generator and Integrated Buffer

General Description

The ICS9158-07 is a low-cost frequency generator designed

specifically for desktop and notebook PC applications. Four

copies of the CPU clock are available and four copies of

the BUS clock are available, elimating the need for an

external buffer.

Each high drive (25mA) output is capable of driving a 30pF

load and has a typical duty cycle of 50/50. The clock outputs

are skew-controlled to within ±250ps.

The ICS9158-07makes a gradual transition between frequen-

cies, so that it meets the Intel cycle-to-cycle timing specifica-

tion for 486 and Pentium systems.

Features

• 8 skew-free, high drive CPU/BUS clocks

• Reference, floppy and keyboard clocks

• ±250ps skew between all outputs

• Less than ±250ps absolute jitter

• Outputs can drive up to 30pF load at 1.5V/ns

• 50±10% duty cycle

• Compatible with 486 and Pentium CPUs

• On-chip loop filter components

• 3.0V - 5.5V supply range

• 24-pin SOIC package

Applications

Ideal for RISC or CISC systems such as 486, Pentium,™

PowerPC,™ etc., requiring multiple CPU and BUS clocks.

Block Diagram

9158-07 Rev B 053197

Pentium is a trademark of Intel Corporation.

PowerPC is a trademark of Motorola Corporation.

NOTE: THIS DATA SHEET, ICS9158-07, IS AN ADDENDUM TO THE EXISTING

ICS9158 DATA SHEET. ALL INFORMATION IN THIS DATA SHEET SUPERSEDES

THE DATA FOUND IN THE ORIGINAL ICS9158 DATA SHEET.

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

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