ics9248-81 Integrated Device Technology, ics9248-81 Datasheet

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ics9248-81

Manufacturer Part Number
ics9248-81
Description
Frequency Generator & Integrated Buffers
Manufacturer
Integrated Device Technology
Datasheet
General Description
Frequency Generator & Integrated Buffers
Block Diagram
Power Groups
9248-81 Rev E 10/12/99
2
2
Features
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.
2
Pin Configuration
48-Pin SSOP
Pentium is a trademark of Intel Corporation
I
2
C is a trademark of Philips Corporation
ICS9248- 81

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ics9248-81 Summary of contents

Page 1

... 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- 81 48-Pin SSOP Pentium is a trademark of Intel Corporation 2 ...

Page 2

... ICS9248 -81 Pin Descriptions Pin number Pin name 1 VDDR/X REF0 1,2 2 Mode 3,9,16,22, GND 27,33, 6,14 VDDPCI FS1 1,2 7 PCICLK_F PCICLK 0 1,2 8 FS2 13, 12, 11, 10 PCICLK [4:1] 15,28,29,31,32, SDRAM 12, 34,35,37,38 SDRAM [7:0] SDRAM CPU_STOP# SDRAM PCI-STOP# 19 VDDSD/C SDRAM SDRAM_STOP# SDRAM PD# 23 SDATA 24 SCLK SEL24_14# 1,2 25 SIO ...

Page 3

... Running Running Low Stopped Stopped 0 Running Low Low 1 Running Running Running Stopped 0 Running Running Low Stopped 1 Running Running Low Stopped Stopped 0 Running Low Low : t ICS9248- ...

Page 4

... ICS9248 -81 Functionality DD DDL SD_SEL FS2 FS1 CPU SDRAM PCI FS0 MHZ MHZ MHZ 0 90.00 90.00 30.00 1 66.70 100.05 33.35 0 95.00 63.33 31.66 1 100.00 66 ...

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 ICS9248-81 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 -81 Serial Configuration Command Bitmap ± ± ...

Page 7

... ICS9248- ...

Page 8

... ICS9248 -81 CPU_STOP# Timing Diagram ...

Page 9

... SDRAM_STOP# Timing Diagram ICS9248-81 ...

Page 10

... ICS9248 -81 PCI_STOP# Timing Diagram ...

Page 11

... Shared Pin Operation - Input/Output Pins Fig. 1 ICS9248-81 ...

Page 12

... ICS9248 -81 Fig. 2a Fig. 2b ...

Page 13

... From target Freq 1 1 2.5 V +/-5% (unless otherwise stated) DDL CONDITIONS pF; Select @ 66.8 MHz pF; Select @ 100 MHz ICS9248-81 MIN TYP MAX UNITS -0.3 0 2.0 -200 -100 60 180 66 180 70 600 11 14.318 16 ...

Page 14

... ICS9248 -81 Electrical Characteristics - CPUCLK 70C VDDL = 3.3 V +/-5 PARAMETER SYMBOL Output High Voltage V OH1a Output Low Voltage V OL1a Output High Current I OH1a Output Low Current I OL1a 1 Rise Time t r1a 1 Fall Time t f1a 1 Duty Cycle d t1a 1 Skew t sk1a 1 Jitter, Cycle-to-cycle ...

Page 15

... V = 1.5 V; Divide by 2 seclects<124MHz 1.5 V; Divide by 3 seclects 1.5 V; Selects >= 124MHz 1.5 V; SDRAM0,8 1.5 V; All except SDRAM8 and 1.5 V; All SDRAMs ICS9248-81 MIN TYP MAX UNITS 2.4 3.1 V 0.1 0.4 V -62 - 1.5 2 140 ...

Page 16

... ICS9248 -81 Electrical Characteristics - REF/48MHz/SIO 70C 3.3 V +/-5 DDL PARAMETER SYMBOL Output High Voltage V OH4 Output Low Voltage V OL4 Output High Current I OH4 Output Low Current I OL4 1 Rise Time Fall Time Duty Cycle Jitter, One Sigma t j1s4 ...

Page 17

... Routed Power = Ground Connection Key (component side copper) = Ground Plane Connection = Power Route Connection = Solder Pads = Clock Load ICS9248-81 Ferrite C2 Bead 22µF/20V Tantalum VDD 2.5V Power Route Clock Load 42 C3 ...

Page 18

... ICS9248 - µ ° Ordering Information ICS9248yF-81 ICS XXXX PPP ...

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