9248AG-195LF Integrated Device Technology, 9248AG-195LF Datasheet

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9248AG-195LF

Manufacturer Part Number
9248AG-195LF
Description
Manufacturer
Integrated Device Technology
Datasheet
Frequency Generator & Integrated Buffers for PENTIUM II III
Block Diagram
0375E—12/15/08
Recommended Application:
440BX, MX, VIA PM/PL/PLE 133 style chip set, with
Coppermine or Tualatin processor, for note book
applications.
Output Features:
Features:
including 1 free running CPUCLK_F
1 - PCI Early @ 3.3V
Up to 137MHz frequency support
97MHz to support high-end AMD processor.
Support power management: CLK, PCI, stop and
Power down Mode from I
Spread spectrum for EMI control
Uses external 14.318MHz crystal
FS pins for frequency select
7 - PCI @ 3.3V, including 1 free running PCICLK_F
4 - CPUs @ 2.5V/3.3V
9 - SDRAM @ 3.3V
1 - 48MHz, @ 3.3V fixed.
1 - 24/48MHz @ 3.3V
2 - REF @3.3V, 14.318MHz.
Integrated
Circuit
Systems, Inc.
2
C programming.
*CPU2.5_3.3#/PCICLK_F
*SELPCIE_6#/PCICLK2
*SEL24_48#/PCICLK1
Key Specifications:
PCICLK6/
Functionality
*Vtt_PWRGD/PD#
B
*SPREAD/REF0
0
0
0
0
0
0
0
0
i
1
1
1
1
1
1
1
1
*FS3/PCICLK0
2 t
CPU Output Jitter @ 2.5V: <300ps
CPU Output Jitter @ 3.3V: <250ps
PCI Output Jitter @ 3.3V: <250ps
CPU Output Skew @ 2.5V: <175ps
CPU Output Skew @ 3.3V: <175ps
PCI Output Skew @ 3.3V: <500ps
PCI Early to PCI Skew @ 3.3V: typ = 3ns
SDRAM Output Skew @ 3.3V: <500ps
PCI_STOP#
BUFFER IN
* Internal Pull-up Resistor of 120K to VDD
PCICLK_E
VDDCOR
GNDREF
VDDREF
PCICLK3
PCICLK4
PCICLK5
GNDPCI
GNDPCI
VDDPCI
VDDPCI
B
GND48
SDATA
SCLK
0
0
0
0
0
0
0
0
i
1
1
1
1
1
1
1
1
6 t
X1
X2
Pin Configuration
B
0
0
0
0
0
0
0
0
i
1
1
1
1
1
1
1
1
5 t
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48-Pin SSOP
1
2
3
4
5
6
7
8
9
B
0
0
0
0
0
0
0
0
i
1
1
1
1
1
1
1
1
4 t
C
P
1
1
1
1
1
1
1
1
1
1
6
6
6
6
9
7
ICS9248-195
0
3
0
0
3
0
3
0
3
4
U
6
6
6
6
0
0
0
3
0
0
3
0
3
5
3
0
6 .
6 .
6 .
6 .
0 .
0 .
C
0 .
3 .
0 .
0 .
3 .
0 .
3 .
0 .
3 .
0 .
7
7
7
7
0
0
L
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
0
3
0
0
3
0
3
0
3
0
K
P
TM
REF1/FS2*
VDDLCPU
CPUCLK_F
CPUCLK0
GNDLCPU
CPUCLK1
CPUCLK2
CLK_STOP#
GNDSDR
SDRAM_F
SDRAM0
SDRAM1
VDDSDR
SDRAM2
SDRAM3
GNDSDR
SDRAM4
SDRAM5
VDDSDR
SDRAM6
SDRAM7
VDD48
48MHz/FS0*
24_48MHz/FS1*
C
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
0
3
5
5
3
5
I
C
3 .
3 .
3 .
3 .
3 .
3 .
3 .
3 .
3 .
3 .
0 .
3 .
0 .
0 .
3 .
0 .
L
& K6
3
3
3
3
3
3
3
3
3
3
0
3
0
0
3
0
K

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9248AG-195LF Summary of contents

Page 1

Integrated Circuit Systems, Inc. Frequency Generator & Integrated Buffers for PENTIUM II III Recommended Application: 440BX, MX, VIA PM/PL/PLE 133 style chip set, with Coppermine or Tualatin processor, for note book applications. Output Features: • CPUs @ 2.5V/3.3V ...

Page 2

ICS9248-195 Pin Descriptions ...

Page 3

General Description The ICS9248-195 is the single chip clock solution for Notebook designs using the 440BX, MX, VIA PM/PL/PLE 133 style chip set, with Coppermine or Tualatin processor, for Note book applications. It provides all necessary clock signals for such ...

Page 4

ICS9248-195 Byte 1: Active/Inactive Register (1 = enable disable ...

Page 5

Byte 4: Active/Inactive Register (1 = enable disable ...

Page 6

ICS9248-195 Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Logic Inputs . . . . . . . ...

Page 7

Electrical Characteristics - CPU 70° 3.3 V +/-5 PARAMETER SYMBOL Output High Voltage V OH2A Output Low Voltage V OL2A Output High Current I OH2A Output Low Current I OL2A 1 ...

Page 8

ICS9248-195 Electrical Characteristics - PCI 70° 3.3 V +/-5 PARAMETER SYMBOL Output High Voltage V OH1 Output Low Voltage V OL1 Output High Current I OH1 Output Low Current I OL1 ...

Page 9

Electrical Characteristics - 24,48MHz 70° 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 ...

Page 10

ICS9248-195 General I The information in this section assumes familiarity with I For more information, contact ICS for an I How to Write: • Controller (host) sends a start bit. • Controller (host) sends the write address D2 • ICS ...

Page 11

Shared Pin Operation - Input/Output Pins The I/O pins designated by (input/output) serve as dual signal functions to the device. During initial power-up, they act as input pins. The logic level (voltage) that is present on these pins at this ...

Page 12

ICS9248-195 PD# Timing Diagram The power down selection is used to put the part into a very low power state without turning off the power to the part. PD asynchronous active low input. This signal needs to be ...

Page 13

CLK_STOP# Timing Diagram CLK_STOP asychronous input to the clock synthesizer used to turn off the CPU clocks for low power operation. CLK_STOP# is synchronized by the ICS9248-195. The minimum that the CPU clock is enabled (CLK_STOP# ...

Page 14

ICS9248-195 PCI_STOP# Timing Diagram PCI_STOP asynchronous input to the ICS9248-195 used to turn off the PCICLK clocks for low power operation. PCI_STOP# is synchronized by the ICS9248-195 internally. The minimum that the PCICLK clocks are enabled ...

Page 15

INDEX INDEX AREA AREA 45° 45° SEATING SEATING b PLANE PLANE .10 (.004) C .10 (.004) C 300 mil SSOP Package Ordering Information ICS9248yF-195LF-T Example: ...

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