Datasheet > ICS9248-101

ICS9248-101

更新时间： 2024-09-28 22:11:03

品牌	Logo	应用领域
矽成 - ICSI		/
页数	文件大小	规格书
17页	363K
描述
Frequency Generator & Integrated Buffers for PENTIUM/ProTM & K6

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ICS9248-101 数据手册

Integrated

Circuit

Systems, Inc.

ICS9248-101

Frequency Generator & Integrated Buffers for PENTIUM/Pro^TM

& K6

General Description

Features

Up to 137MHz frequency support

The ICS9248-101 is the single chip clock solution for

Notebook designs using the 440BX or the VIAApollo Pro 133

style chipset. It provides all necessary clock signals for such a

system.

Spread Spectrum for EMI control

Serial I²C interface for Power Management,

Frequency Select, Spread Spectrum.

Provides the following system clocks

- 4-CPUs@2.5/3.3V, upto137MHz.

(includingCPUCLK_F)

Spread spectrum may be enabled through I²C programming.

Spread spectrum typically reduces system EMI by 8dB to

10dB. This simplifies EMI qualification without resorting to

board design iterations or costly shielding. The ICS9248-101

employs a proprietary closed loop design, which tightly

controls the percentage of spreading over process and

temperature variations.

- 9-SDRAMs @3.3V, upto137MHz

(including SDRAM_F)

- 8-PCI@3.3V, CPU/2orCPU/3

(including 1 free running PCICLK_F)

- 1-24/48MHz@3.3V

-1-48MHz@3.3Vfixed

- 2-REF@3.3V,14.318MHz.

Efficient Power management scheme through PCI

andSTOPCLOCKS

Spread Spectrum ± .25%, & 0 to -0.5% down spread

Block Diagram

Pin Configuration

VDDREF

REF0

GNDREF

VDDPCI

REF1/FS2*

VDDLCPU

CPUCLK_F

CPUCLK0

GNDLCPU

CPUCLK1

CPUCLK2

CLK_STOP#

GNDSDR

SDRAM_F

SDRAM0

SDRAM1

VDDSDR

SDRAM2

SDRAM3

GNDSDR

SDRAM4

*CPU2.5_3.3#/PCICLK_F

*FS3/PCICLK0

GNDPCI

*SEL24_48#/PCICLK1

PCICLK2

PCICLK3

PCICLK4

VDDPCI

BUFFER IN

GNDPCI

PCICLK5

PCICLK6

VDDCOR

PCI_STOP#

*PD#

SDRAM5

VDDSDR

SDRAM6

SDRAM7

VDD48

GND48

SDATA

SCLK

48MHz/FS0*

24_48MHz/FS1*

I²C

{

48-Pin SSOP and TSSOP

* Internal Pull-up Resistor of 120K to VDD

Power Groups

VDDLCPU,GNDLCPU=CPUCLK[2:0],CPUCLK_F

VDDSDR,GNDSDR=SDRAMCLKS[7:0],SDRAM_F

VDDPCI,GNDPCI=PCICLKS[6:0],PCICLK_F

VDD48,GND48=48MHz,24MHz

VDDREF,GNDREF=REF,X1,X2

VDDCOR=PLLCORE

Pentium is a trademark of Intel Corporation

I²C is a trademark of Philips Corporation

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

9248-101 Rev C 2/29/00

information being relied upon by the customer is current and accurate.

12 3 4 5 6 7...17

中文翻译

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与ICS9248-101相关器件

型号	品牌	获取价格	描述	数据表
ICS9248-103	ICSI	获取价格	Frequency Generator & Integrated Buffers for PENTIUM/ProTM
ICS9248-107	ICSI	获取价格	Frequency Timing Generator for PENTIUM II Systems
ICS9248-110	ICSI	获取价格	AMD-K7TM System Clock Chip
ICS9248-112	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9248-114	ICSI	获取价格	AMD - K7⑩ System Clock Chip
ICS9248-126	ICSI	获取价格	Frequency Generator & Integrated Buffers for
ICS9248-127	ICSI	获取价格	Frequency Generator & Integrated Buffers for PENTIUM/ProTM
ICS9248-128	ICSI	获取价格	Frequency Generator & Integrated Buffers
ICS9248-131	ICSI	获取价格	Frequency Generator & Integrated Buffers for Celeron & PII/III??
ICS9248-134	ICSI	获取价格	Frequency Timing Generator for PENTIUM II/III Systems

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