EEWORLDEEWORLDEEWORLD

Part Number

Search

ICS9248-135

Description
Frequency Generator & Integrated Buffers for Celeron & PII/III⑩& K6
File Size183KB,15 Pages
ManufacturerICS ( IDT )
Websitehttp://www.icst.com
Download Datasheet Compare View All

ICS9248-135 Overview

Frequency Generator & Integrated Buffers for Celeron & PII/III⑩& K6

Integrated
Circuit
Systems, Inc.
ICS9248-135
Frequency Generator & Integrated Buffers for Celeron & PII/III™& K6
Recommended Application:
Motherboard Single chip clock solution for SIS540,
SIS630 Pentium II/III and K6 chipsets.
Output Features:
3- CPUs @ 2.5/3.3V, up to 166MHz.
10 - SDRAM @ 3.3V, up to 166MHz
including 2 SDRAM_F's
7- PCI @3.3V,
1- 48MHz, @3.3V fixed.
1- 24/48MHz, @3.3V selectable by I
2
C
(Default is 24MHz).
2- REF @3.3V, 14.318MHz.
Features:
Up to 166MHz frequency support
Support FS0-FS3 trapping status bit for I
2
C read back.
Support power management: CPU, PCI, SDRAM stop
and Power down Mode form I
2
C programming.
Spread spectrum for EMI control (0 to -0.5%, ± 0.25%).
FS0, FS1, FS3 must have a internal 120K pull-Down
to GND.
Uses external 14.318MHz crystal
Skew Specifications:
CPU - CPU: < 175ps
SDRAM - SDRAM < 250ps
PCI - PCI: < 500ps
CPU - SDRAM: < 500ps
CPU (early) - PCI: 1-4ns (typ. 2ns)
Pin Configuration
VDDREF
1
* REF0/FS3
GNDREF
X1
X2
VDDPCI
*PCICLK_F/FS1
*PCICLK1/FS2
PCICLK2
GNDPCI
PCICLK3
PCICLK4
PCICLK5
PCICLK6
VDD
GND
SDRAM_STOP#
**PD#
VDD
CPU_STOP#
PCI_STOP#
GND
SDATA
SCLK
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
REF1
VDDLCPU
CPUCLK_F
CPUCLK1
GNDL
CPUCLK2
VDD
SDRAM_F1
SDRAM_F0
GND
SDRAM7
SDRAM6
VDD
SDRAM5
SDRAM4
GND
SDRAM3
SDRAM2
VDD
SDRAM1
SDRAM0
VDD
1
48MHz/FS0*
24_48MHz/CPU2.5_3.3#*
48-Pin 300mil SSOP
* These inputs have a 120K pull down to GND.
** These inputs have a 120K pullup to VDD.
1 These are double strength.
Functionality
Block Diagram
FS3
PLL2
/2
X1
X2
XTAL
OSC
PLL1
Spread
Spectrum
48MHz
24_48MHz
ICS9248-135
CPU
(MHz)
66.6
100.0
150.0
133.3
66.8
100.0
100.0
133.3
66.8
97.0
70.0
95.0
95.0
112.0
97.0
96.2
FS2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
FS1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
FS0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2
REF[1:0]
CPU
DIVDER
Stop
2
CPUCLK [2:1]
CPUCLK_F
SDRAM
DIVDER
Stop
8
SDRAM [7:0]
SDRAM_F [1:0]
CPU2.5_3.3#
SDATA
SCLK
FS[3:0]
PD#
PCI_STOP#
CPU_STOP#
SDRAM_STOP#
Config.
Reg.
Control
Logic
PCI
DIVDER
Stop
6
2
PCICLK [6:1]
PCICLK_F
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
SDRAM
(MHz)
100.0
100.0
100.0
100.0
133.6
133.3
150.0
133.3
66.8
97.0
105.0
95.0
126.7
112.0
129.3
96.2
PCICLK
(MHz)
33.3
33.3
37.5
33.3
33.4
33.3
37.5
33.3
33.4
32.3
35.0
31.7
31.7
37.3
32.2
32.1
9248-135 Rev A 1/16/01
Third party brands and names are the property of their respective owners.
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.

ICS9248-135 Related Products

ICS9248-135 ICS9248yF-135-T
Description Frequency Generator & Integrated Buffers for Celeron & PII/III⑩& K6 Frequency Generator & Integrated Buffers for Celeron & PII/III⑩& K6
S3C2440 bootloader error loading nk.bin
I used Feiling's Uboot to download NK.bin, and an error message was prompted. The error message is as follows: [color=#FF0000]real entry is 0x%00000000, physical address is 0x%00000000[/color] The pro...
atom1212 Embedded System
Urgent~~~~Please ask a SQL statement about WinCE~~~~Urgent
I have no problem executing the following statement on SQL2005, but it fails on CE. How can I solve this problem? select * from ( Select SakuseiHiduke, case DakokuCode when '01' then max(SakuseiJikoku...
liujihouren Embedded System
PCB Learning 1
[table=97%][tr][td]Common electronic component packages[/td][/tr][tr][td][/td][/tr][tr][td][table=98%][tr][td]Resistors: RES1, RES2, RES3, RES4; the package attributes are axial series non-polar capac...
yuandayuan6999 PCB Design
【MicroPython】+Home Weather Meter
My home weather camera has started working, and all the content I share will be shared in this post. The whole process is open source! Welcome everyone to give advice. I am a complete novice, so I hop...
strong161 MicroPython Open Source section
QT usage error
When using the make command of qmake, the following error occurs:make: g++: command not found make: *** [hello.o] Error 127What should I do?UBUNTO 10.0 system, qt novice, please give me some advice...
sphshine Linux and Android
Hardware Design: Summary of Capacitors, Inductors and Magnetic Beads (Reprinted from the Internet)
Common capacitors are: Aluminum electrolytic capacitor: polarity, large capacity, can withstand large pulsating current, but has large capacity error and leakage current, suitable for low-frequency by...
yayasoso Energy Infrastructure?

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1504  364  2829  647  535  31  8  57  14  11 
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