ICS9148F-02

ICS9148F-02 Datasheet

ICS9148-02

Part	Datasheet
ICS9148F-02	ICS9148F-02 (pdf)

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Integrated Circuit Systems, Inc. ICS9148-02 Pentium/ProTM System Clock Chip The ICS9148-02 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that will provide all necessary clock timing. Features include four CPU, seven PCI and eight SDRAM clocks. Two reference outputs are available equal to the crystal frequency. Additionally, the device meets the Pentium power-up stabilization, which requires that CPU and PCI clocks be stable within 2ms after power-up. PWR_DWN# pin allows low power mode by stopping crystal OSC and PLL stages. For optional power management, CPU_STOP# can stop CPU 0:3 clocks and PCI_STOP# will stop PCICLK 0:5 clocks. CPU and IOAPIC output buffer strength controlled by CPU pin to match VDDL voltage. High drive CPUCLK outputs typically provide greater than 1 V/ns slew rate into 20pF loads. PCICLK outputs typically provide better than 1V/ns slew rate into 30pF loads while maintaining 50±5% duty cycle. The REF clock outputs typically provide better than 0.5V/ns slew rates. The ICS9148-02 accepts a 14.318MHz reference crystal or clock as its input and runs on a 3.3V core supply. Generates system clocks for CPU, IOAPIC, SDRAM, PCI, plus MHz REF 0:1 , USB, Plus Super I/O Supports single or dual processor systems I2C serial configuration interface provides output clock disabling and other functions MODE input pin selects optional power management input control pins Two fixed outputs separately selectable as 24 or 48MHz Separate 2.5V and 3.3V supply pins 2.5V or 3.3V outputs CPU, IOAPIC 3.3V outputs SDRAM, PCI, REF, 48/24 MHz CPU logic pin to adjust output strength No power supply sequence requirements Uses external 14.318MHz crystal 48 pin 300 mil SSOP Output enable register for serial port control: 1 = enable 0 = disable Pin Configuration Block Diagram 48-Pin SSOP Functionality VDD 1:4 3.3V±10%, VDDL1, 2 or 0-70°C Crystal X1, X2 = MHz CPUCLK, SDRAM PCICLK 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. ICS9148-02 Pin Descriptions PIN NUMBER 2, 1 3, 10, 17, 24, 31, 37, 43 4 PIN NAME REF 0:1 GND X1 X2 7, 15 8 Ordering Information ICS9148F-02 Example: ICS XXXX F - PPP MIN. NOM. MAX. This table in inches Pattern Number 2 or 3 digit number for parts with ROM code patterns Package Type F=SSOP Device Type consists of 3 or 4 digit numbers Prefix ICS, AV = Standard Device ICS reserves the right to make changes in the device data identified in this 16 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.

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Integrated Circuit Systems, Inc.

ICS9148-02

Pentium/ProTM System Clock Chip

The ICS9148-02 is a Clock Synthesizer chip for Pentium and PentiumPro CPU based Desktop/Notebook systems that will provide all necessary clock timing.

Features include four CPU, seven PCI and eight SDRAM clocks. Two reference outputs are available equal to the crystal frequency. Additionally, the device meets the Pentium power-up stabilization, which requires that CPU and PCI clocks be stable within 2ms after power-up.

PWR_DWN# pin allows low power mode by stopping crystal OSC and PLL stages. For optional power management, CPU_STOP# can stop CPU 0:3 clocks and PCI_STOP# will stop PCICLK 0:5 clocks. CPU and IOAPIC output buffer strength controlled by CPU pin to match VDDL voltage.

High drive CPUCLK outputs typically provide greater than 1 V/ns slew rate into 20pF loads. PCICLK outputs typically provide better than 1V/ns slew rate into 30pF loads while maintaining 50±5% duty cycle. The REF clock outputs typically provide better than 0.5V/ns slew rates.

The ICS9148-02 accepts a 14.318MHz reference crystal or clock as its input and runs on a 3.3V core supply.

Generates system clocks for CPU, IOAPIC, SDRAM,

PCI, plus MHz REF 0:1 , USB, Plus Super I/O

Supports single or dual processor systems I2C serial configuration interface provides output clock
disabling and other functions

MODE input pin selects optional power management
input control pins

Two fixed outputs separately selectable as
24 or 48MHz

Separate 2.5V and 3.3V supply pins
2.5V or 3.3V outputs CPU, IOAPIC
3.3V outputs SDRAM, PCI, REF, 48/24 MHz

CPU logic pin to adjust output strength

No power supply sequence requirements

Uses external 14.318MHz crystal
48 pin 300 mil SSOP

Output enable register
for serial port control:
1 = enable
0 = disable

Pin Configuration

Block Diagram
48-Pin SSOP

Functionality

VDD 1:4 3.3V±10%, VDDL1, 2 or 0-70°C Crystal X1, X2 = MHz

CPUCLK, SDRAM PCICLK

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.

ICS9148-02

Pin Descriptions

PIN NUMBER
2, 1 3, 10, 17, 24,
31, 37, 43 4

PIN NAME REF 0:1 GND X1 X2
7, 15 8
Ordering Information

ICS9148F-02

Example:

ICS XXXX F - PPP

MIN. NOM. MAX.

This table in inches

Pattern Number 2 or 3 digit number for parts with ROM code patterns

Package Type F=SSOP

Device Type consists of 3 or 4 digit numbers

Prefix ICS, AV = Standard Device

ICS reserves the right to make changes in the device data identified in this
16 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.

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ICS9148F-02 Datasheet file may be downloaded here without warranties.

Datasheet ID: ICS9148F-02 637212