EEWORLDEEWORLDEEWORLD

Part Number

Search

ICS9248F-61

Description
Frequency Timing Generator for Pentium II Systems
File Size285KB,9 Pages
ManufacturerICS ( IDT )
Websitehttp://www.icst.com
Download Datasheet Compare View All

ICS9248F-61 Overview

Frequency Timing Generator for Pentium II Systems

Integrated
Circuit
Systems, Inc.
ICS9248-61
Frequency Timing Generator for Pentium II Systems
General Description
The
ICS9248-61
is the Main clock solution for Notebook
designs using the Intel 440BX style chipset. Along with an
SDRAM buffer such as the ICS9179-03, it provides all
necessary clock signals for such a system.
Spread spectrum may be enabled by driving pin 26, SPREAD#
active (Low) at power-on. Spread spectrum typically reduces
system EMI by 8dB to 10dB. This simplifies EMI qualification
without resorting to board design iterations or costly shielding.
The
ICS9248-61
employs a proprietary closed loop design,
which tightly controls the percentage of spreading over
process and temperature variations.
Features
•
Generates the following system clocks:
- 2CPU(2.5V) up to 100MHz.
- 7 PCI(3.3V) @ 33.3MHz (Includes one free running).
- 2 REF clks Fixed (3.3V) 48MHz at 14.318MHz.
Skew characteristics:
- CPU – CPU<175ps
- PCI – PCI < 250ps
- PCI_E (early) – PCI = 2.1ns
- CPU(early) – PCI = 1.5ns – 4ns
Supports Spread Spectrum modulation for CPU and PCI
clocks, 0.5% down spread
Efficient Power management scheme through stop clocks
and power down modes.
Uses external 14.318MHz crystal, no external load cap
required for CL=18pF crystal.
28 pin 209mil SSOP.
•
•
•
Block Diagram
•
•
Pin Configuration
28 pin SSOP
Power Groups
GNDR/C = REFCLK, CORE, Crystal
VDDCOR = Core
GNDLCPU, VDDCPU = CPU
GND48, VDD48 = 48MHz
VDDPCI, GNDPCI - PCICLK, PCICLK_F, PCICLK_E
Pentium is a trademark on Intel Corporation.
9248-61 Rev B 1/8/99
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.

ICS9248F-61 Related Products

ICS9248F-61 ICS9248-61
Description Frequency Timing Generator for Pentium II Systems Frequency Timing Generator for Pentium II Systems
The signal chain course has landed in TI classroom, come and watch it now!
TI classroom has recently added a batch of signal chain courses, each of which is exciting. Come and watch them. :hug: The courses revolve around the theme of "motor", explaining the basic principles ...
EEWORLD社区 TI Technology Forum
Keysight Appreciation Month Event Ideas
[b][color=#5E7384]This content is originally created by [size=3]fsyicheng[/size], a user of EEWORLD forum. If you want to reprint or use it for commercial purposes, you must obtain the author's consen...
fsyicheng Talking
[Sharing] After porting Android to the Xunwei 4412 development board, the problem of installing QQ and not being able to communicate via video, but the camera is available
Problem: Development board android4.0, video communication cannot be performed after installing QQ Solution: QQ uses the front camera by default. You need to configure the 200w camera in the kernel an...
Chihiro ARM Technology
TI Library now has Chinese examples
SW-LM3S-8264软件包已支持中文显示,在DK-LM3S9B96上实验例程,StellarisWare\third_party\fonts\lang_demoThe lang_demo example application has been updated to include support for accented characters in German and Spanish st...
lonlmjs Microcontroller MCU
New Arrival
Request for schematic diagram of static alarm...
易良清 TI Technology Forum
DIY a USB to CAN tool for debugging
There are many tools for converting USB to CAN. The cheapest ones are as low as tens of yuan on Taobao, and the more expensive ones are only worth a few dollars. There are many open source ones, so I ...
电子微创意 DIY/Open Source Hardware

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 2518  2811  1388  632  2914  51  57  28  13  59 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号