ics9248-87 Integrated Device Technology, ics9248-87 Datasheet

ics9248-87

Manufacturer Part Number

ics9248-87

Description

Frequency Generator & Integrated Buffers For Celeron & Pii/iii

Manufacturer

Integrated Device Technology

Datasheet

1.ICS9248-87.pdf (13 pages)

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I C

Frequency Generator & Integrated Buffers for Celeron & PII/III™

Third party brands and names are the property of their respective owners.

SEL24_48#

Recommended Application:

Output Features:

•

Features:

•

Skew Specifications:

•

Block Diagram

9248-87 Rev D 10/27/00

{

FS[3:0]

SDATA

SCLK

2- CPUs @2.5V, up to 155MHz.

9 - SDRAM @ 3.3V, up to 155MHz.

8 - PCICLK @ 3.3V

1 - IOAPIC @ 2.5V,

2 - 3V66MHz @ 3.3V

2- 48MHz, @3.3V fixed.

1- 24/48MHz, @3.3V

1- REF @3.3V, 14.318MHz.

Up to 155MHz frequency support

Support FS0-FS3 strapping status bit for I

Support power management: Power down Mode from I

programming.

Spread spectrum for EMI control ( ± 0.25% center).

Uses external 14.318MHz crystal

CPU – CPU: <175ps

SDRAM - SDRAM: < 250ps

3V66 – 3V66: <175ps

PCI – PCI: <500ps

For group skew specification, please refer to group

timing relationships table.

PD#

XTAL

OSC

Spectrum

PLL2

Spread

Control

Config.

PLL1

Logic

Reg.

Integrated

Circuit

Systems, Inc.

DIVDER

SDRAM

IOAPIC

3V66

CPU

PCI

/ 2

C read back.

48MHz

24_48MHz

SDRAM [7:0]

SDRAM_F

IOAPIC

PCICLK [7:0]

3V66 [1:0]

CPUCLK [1:0]

REF1

Functionality

3 S

2 S

1 S

0 S

Preliminary Product Preview

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.

(

4 2

5 5

3 4

0 7

2 1

0 5

0 4

7 0

8 3

6 6

0 0

3 3

8 6

7 3

3 . 3

0 0 .

6 9 .

0 0 .

3 3 .

0 0 .

3 3 .

0 8 .

0 3 .

0 6 .

) z

48-Pin 300mil SSOP

Pin Configuration

/ U

0 0 .

3 3 .

7 6 .

3 3 .

7 6 .

3 3 .

7 6 .

3 3 .

(

4 2

5 5

8 0

5 0

2 1

0 5

5 0

2 0

7 0

8 3

3 0

0 0

3 3

0 0

0 0 .

0 5 .

0 0 .

0 2 .

0 3 .

0 6 .

0 2 .

3 . 3

) z

(

5 5

2 8

3 0

2 7

0 7

4 7

0 0

0 7

8 6

1 7

2 9

8 6

6 6

9 8

6 6

0 0 .

0 8 .

8 4 .

7 6 .

3 3 .

7 6 .

3 3 .

7 6 .

7 0 .

ICS9248-87

) z

3 (

(

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7 2

1 5

6 3

5 3

0 5

5 3

4 3

5 3

6 4

4 3

3 3

) 2 /

1 4

7 3

4 4

* 6

) z

4 7 .

3 3 .

7 6 .

0 0 .

3 3 .

0 0 .

7 1 .

7 6 .

0 0 .

4 3 .

0 4 .

3 5 .

0 4 .

O I

(

P (

8 1

7 1

5 2

7 1

3 2

6 1

3 1

0 2

5 2

8 1

7 1

2 2

) 2 /

* I

7 8 .

7 6 .

0 0 .

0 5 .

7 6 .

0 0 .

0 5 .

8 0 .

0 0 .

7 1 .

0 7 .

7 2 .

0 7 .

) z

3 8 .

C I

O I

(

P (

6 3

5 3

0 5

5 3

6 4

3 3

7 2

1 4

1 5

7 3

4 3

5 3

4 3

4 4

) I

4 7 .

0 0 .

4 3 .

0 4 .

) z

3 3 .

7 6 .

3 3 .

7 1 .

7 6 .

3 5 .

C I

Related parts for ics9248-87

ics9248-87 Summary of contents

Page 1

... 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. ICS9248- ...

Page 2

... ICS9248-87 Preliminary Product Preview General Description 2 Pin Configuration PIN NUMBER PIN NAME REF1 1 FS3 2, 6, 16, 24, 27, 34, VDD 13, 20, 26, 30, GND 3V66 [1:0] FS0 10 PCICLK0 FS1 11 PCICLK1 FS2 12 PCICLK2 19, 18, 17, 15, 14 PCICLK [7:3] 21, 22 48MHz SEL24_48# 23 24_48MHz 25 SDATA 28 SCLK ...

Page 3

... Preliminary Product Preview 2 C serial interface information 2 How to Read: (H) Controller (Host) ACK ACK ACK ACK ACK ACK ACK ACK ACK 2 2 ICS9248-87 2 How to Read: ICS (Slave/Receiver) Start Bit Address D3 (H) ACK Byte Count ACK Byte 0 ACK Byte 1 ACK Byte 2 ACK Byte 3 ...

Page 4

... ICS9248-87 Preliminary Product Preview Serial Configuration Command Bitmap ...

Page 5

... ICS9248-87 Preliminary Product Preview ...

Page 6

... ICS9248-87 Preliminary Product Preview Shared Pin Operation - Input/Output Pins Third party brands and names are the property of their respective owners. Fig. 1 ...

Page 7

... Third party brands and names are the property of their respective owners. Preliminary Product Preview Fig. 2a Fig. 2b ICS9248-87 ...

Page 8

... ICS9248-87 Preliminary Product Preview PD# Timing Diagram Third party brands and names are the property of their respective owners. ...

Page 9

... CONDITIONS = Inputs with no pull-up resistors Inputs with pull-up resistors pF; Select @ 66M pF; With input address to Vdd or GND target Freq. DD ICS9248-87 Preliminary Product Preview ...

Page 10

... ICS9248-87 Preliminary Product Preview Electrical Characteristics - CPU 70C 2.5 V +/-5 DDL PARAMETER SYMBOL 1 Output Impedance R DSP2B 1 Output Impedance R DSN2B Output High Voltage V OH2B Output Low Voltage V OL2B Output High Current I OH2B Output Low Current I OL2B 1 Rise Time t r2B 1 Fall Time ...

Page 11

... 2 =3.135 V OH @MIN OH@ MAX =0.4 V OL@ MIN OL@ MAX ICS9248-87 Preliminary Product Preview MIN TYP MAX UNITS 0.4 -27 - 0.4 1.6 0.4 1 500 250 MIN TYP MAX UNITS ...

Page 12

... ICS9248-87 Preliminary Product Preview Electrical Characteristics - PCI 70C 3.3 V +/-5 PARAMETER SYMBOL 1 Output Impedance R DSP1 1 Output Impedance R DSN1 Output High Voltage V OH1 Output Low Voltage V OL1 Output High Current I OH1 Output Low Current I OL1 1 Rise Time Fall Time ...

Page 13

... Ordering Information ICS9248yF-87 ICS XXXX PPP Third party brands and names are the property of their respective owners. ICS9248-87 Preliminary Product Preview SYMBOL In Millimeters COMMON DIMENSIONS COMMON DIMENSIONS MIN MAX A 2.413 2.794 A1 0.203 0.406 b 0.203 0.343 c 0.127 0.254 SEE VARIATIONS D E 10.033 10 ...

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