Datasheet > ICS9250-14

ICS9250-14

更新时间： 2024-09-24 22:55:27

品牌	Logo	应用领域
矽成 - ICSI		/
页数	文件大小	规格书
13页	412K
描述
Frequency Timing Generator for Pentium II Systems

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

ICS9250-14 数据手册

ICS9250-14

Integrated

Circuit

Preliminary Product Preview

Systems, Inc.

Frequency Timing Generator for Pentium II Systems

General Description

The ICS9250-14 is a single chip clock for Intel Pentium II.

Features

Generates the following system clocks:

- 2 - CPUs @ 2.5V, up to 150MHz.

-1-IOAPIC@2.5V, PCIorPCI/2MHz.

-13 SDRAMs(3.3V)@150MHz.

-2-3V66@3.3V,2xPCIMHz.

-8-PCIs@3.3V.

-1-48MHz, @3.3Vfixed.

-2-REF@3.3V,14.318Hz.

It provides all necessary clock signals for such a system.

Spread spectrum may be enabled through I²C programming.

Spread spectrum typically reduces EMI by 8dB to 10 dB.

This simplifies EMI qualification without resorting to board

design iterations or costly shielding. The ICS9250-14

employs a proprietary closed loop design, which tightly

controls the percentage of spreading over process and

temperature variations.

-1-24MHz, @3.3Vfixed.

Supports spread spectrum modulation ,

± .25% center spread.

I²C support for power management

Efficient power management scheme through PD#

Uses external 14.138 MHz crystal

Block Diagram

Skew Specifications

CPUCPU:<175ps

SDRAM - SDRAM: < 250ps

3V663V66:<250ps

PCIPCI:<500ps

CPU-SDRAM<500ps

CPU(early)-PCI:MIN=1.0ns,TYP=2.0,MAX=4.0

CPU-3V66<500ps

3V66(early)-PCI:MIN=1.5ns,TYP=2.0,MAX=4.0

IOAPIC-PCI<500ps

Pin Configuration

Power Groups

GNDREF,VDDREF=REF,Crystal

GND3V66,VDD3V66=3V66

GNDPCI,VDDPCI=PCICLKs

GNDCOR,VDDCOR=PLLCORE

GND48,VDD48=48

GNDSDR,VDDSDR=SDRAM

GNDLCPU,VDDLCPU=CPUCLK

GNDLPCI,VDDLAPIC=IOAPIC

56-Pin 300 mil SSOP

1. These pins will have 2X drive strength.

* 120K ohm pull-up to VDD on indicated inputs.

PentiumII is a trademark of Intel Corporation

I²C is a trademark of Philips Corporation

PRODUCT PREVIEW documents contain information on new

products in the sampling or preproduction phase of development.

Characteristic data and other specifications are subject to change

without notice.

9250-14RevA 2/5/00

12 3 4 5 6 7...13

中文翻译

下载PDF

与ICS9250-14相关器件

型号	品牌	获取价格	描述	数据表
ICS9250-16	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9250-18	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9250-19	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9250-22	ICSI	获取价格	Frequency Generator for P IV⑩
ICS9250-23	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9250-25	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9250-26	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9250-27	IDT	获取价格	Frequency Generator and Integrated Buffers for Celeron & PII/IIITM
ICS9250-27	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9250-28	ICSI	获取价格	Frequency Generator & Integrated Buffers for