ics9248-77 Integrated Device Technology, ics9248-77 Datasheet

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ics9248-77

Manufacturer Part Number
ics9248-77
Description
Frequency Timing Generator For Pentium Ii Systems
Manufacturer
Integrated Device Technology
Datasheet
Frequency Timing Generator for PENTIUM II Systems
Features
General Description
Key Specification
9248-77 Rev C 10/20/99
Integrated
Circuit
Systems, Inc.
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.
Pin Configuration
Block Diagram
48-pin SSOP
ICS9248-77

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ics9248-77 Summary of contents

Page 1

... Features • • • Key Specification 9248-77 Rev C 10/20/99 ICS9248-77 Pin Configuration 48-pin SSOP Block Diagram 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 ...

Page 2

... ICS9248-77 Power Groups: Pin Descriptions Pin number Pin name 1, 7, 13, 19, 25, 31 GND 2 REF0 REF1 3 SEL24_48 4, 10, 16, 23, VDD 28 PCICLK_F 8 FS0 PCICLK1 9 FS1 PCICLK2 11 FS2 PCICLK3 12 FS3 14, 15, 17, 18, 20, PCICLK [4:10] 21 PD# 24_48MHz 26 FREQ_APIC 27 48MHz/SEL_3V66 29 SCLK 30 SDATA 32, 33, 34 ...

Page 3

... ICS9248- ...

Page 4

... ICS9248-77 Power Management Features Power Management Requirements ...

Page 5

... Stop Bit Notes serial interface information 2 How to Read: (H) Controller (Host) ACK ACK ACK ACK ACK ACK ACK ACK ACK 2 2 ICS9248-77 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 ACK ...

Page 6

... ICS9248-77 Serial Configuration Command Bitmap ± ...

Page 7

... ICS9248- ...

Page 8

... ICS9248-77 PD# Timing Diagram Notes: ...

Page 9

... To 1st crossing of target Freq. From 1st crossing to 1% target Freq. From target Freq 2.5 V +/-5% (unless otherwise stated) CONDITIONS pF; Select @ 100 MHz pF; Select @ 133 MHz pF; PWRDWN ICS9248-77 MIN TYP MAX UNITS -0.3 0 ...

Page 10

... ICS9248-77 Group Offset Group Offset CPU to 3V66 0.0-1.5ns CPU leads 3V66 to PCI 1.5-4.0ns 3V66 leads CPU to IOAPIC 1.5-4.0ns CPU leads No te All o ffsets are to be meas u red at ris in g edg es. Electrical Characteristics - CPUCLK 70º 3.3 V +/-5 PARAMETER SYMBOL Output High Voltage ...

Page 11

... CONDITIONS ICS9248-77 MIN TYP MAX UNITS 2.4 3.1 V 0.17 0.4 V -51 - 0.5 1 0.5 1 250 ps 299 500 ps 87 150 ps -500 235 ...

Page 12

... ICS9248-77 Electrical Characteristics - 48 MHz 70º 3.3 V +/-5 PARAMETER SYMBOL Output High Voltage V OH5 Output Low Voltage V OL5 Output High Current I OH5 Output Low Current I OL5 1 Rise Time Fall Time Duty Cycle Jitter, Cycle-to-cycle T jcyc-cyc5 1 Jitter, One Sigma ...

Page 13

... ICS9248-77 MIN TYP MAX UNITS 2 2.24 V 0.31 0.4 V - 139 250 ps 167 500 ps 30 150 ps -250 104 ...

Page 14

... ICS9248- µ ° Ordering Information ICS9248yF-77 ICS XXXX PPP SSOP Package ...

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