ics9248-126 Integrated Device Technology, ics9248-126 Datasheet

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ics9248-126

Manufacturer Part Number
ics9248-126
Description
Motherboard Single Chip Clock Solution For Pentium Ii/iii And K6 Processos, Using Sis540/630 Style Chipset.
Manufacturer
Integrated Device Technology
Datasheet
Frequency Generator & Integrated Buffers for Celeron & PII/III™ & K6
Third party brands and names are the property of their respective owners.
Recommended Application:
Output Features:
Features:
Skew Specifications:
Block Diagram
CPU2.5_3.3#
9248-126 Rev C 9/6/00
FS(3:0)
3- CPUs @ 2.5/3.3V, up to 166MHz.
14 - SDRAM @ 3.3V
7- PCI @3.3V,
1- 48MHz, @3.3V fixed.
1- 24/48MHz, @3.3V selectable by I
(Default is 24MHz).
2- REF @3.3V, 14.318MHz.
Up to 166MHz frequency support
Support FS0-FS3 trapping status bit for I
Support power management: CPU, PCI, SDRAM stop
and Power down Mode form I
Spread spectrum for EMI control (0 to -0.5%, ± 0.25%).
FS0, FS1, FS3 must have a internal 120K pull-Down
to GND.
Uses external 14.318MHz crystal
CPU - CPU: < 175ps
SDRAM - SDRAM < 500ps
PCI - PCI: < 500ps
CPU - SDRAM: < 500ps
CPU - PCI: 1 - 4ns
SDATA
SCLK
X2
X1
4
Integrated
Circuit
Systems, Inc.
XTAL
OSC
Spectrum
PLL2
Spread
PLL1
Config.
Control
LATCH
Reg.
Logic
DIVDER
CLOCK
CPU
DIVDER
CLOCK
PCI
/ 2
2
C programming.
SDRAM
DIVDER
CLOCK
2
C
2
14
C read back.
2
3
7
48MHz
24_48MHz
SDRAM (13:0)
PCICLK (6:0)
CPUCLK (2:0)
REF (1:0)
Functionality
F
S
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
3
*PCICLK0/FS1
*PCICLK1/FS2
* REF0/FS3
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.
F
PCICLK2
PCICLK3
PCICLK4
PCICLK5
PCICLK6
VDDSDR
SDRAM0
SDRAM1
VDDSDR
SDRAM2
SDRAM3
VDDREF
VDDPCI
S
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
SDATA
2
SCLK
GND
GND
GND
GND
X1
X2
F
48-Pin 300mil SSOP
Pin Configuration
0
0
0
0
0
0
0
0
S
1
1
1
1
1
1
1
1
1
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
F
S
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
(
M
1
1
1
1
1
1
1
C
9
6 6
6 6
6 6
7 9
0 7
5 9
5 9
7 9
0 0
0 5
0 0
0 0
2 1
3 3
3 3
6
P
H
6 .
8 .
8 .
0 .
0 .
0 .
0 .
0 .
2 .
U
0 .
0 .
3 .
0 .
0 .
3 .
0 .
) z
ICS9248-126
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
S
(
D
M
1
1
1
1
1
1
1
1
1
1
1
1
9
6 6
7 9
5 9
0 0
0 0
0 0
0 0
3 3
3 3
0 5
3 3
5 0
6 2
2 1
9 2
R
6
H
8 .
0 .
0 .
2 .
A
REF1
VDDLCPU
CPUCLK0
CPUCLK1
GND
CPUCLK2
VDDSDR
SDRAM13
SDRAM12
GND
SDRAM11
SDRAM10
VDDSDR
SDRAM9
SDRAM8
GNDSDR
SDRAM7
SDRAM6
VDDSDR
SDRAM5
SDRAM4
VDDSDR
48MHz/FS0*
24_48MHz/CPU2.5_3.3#*
0 .
0 .
0 .
0 .
0 .
0 .
0 .
6 .
3 .
3 .
7 .
3 .
) z
M
P
(
C
M
1
3 3
3 3
7 3
3 3
3 3
3 3
7 3
3 3
3 3
2 3
5 3
1 3
1 3
7 3
2 3
2 3
I
C
H
3 .
3 .
5 .
3 .
4 .
3 .
5 .
3 .
4 .
3 .
0 .
7 .
7 .
3 .
2 .
1 .
L
) z
K

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ics9248-126 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. ICS9248-126 1 48 REF1 ...

Page 2

... ICS9248-126 General Description Pin Configuration PIN NUMBER PIN NAME 1, 6, 15, 19, 27, 30, VDD 36, 42 REF0 2 FS3 3, 10, 16, 22, GND 33, 39 FS1 7 PCICLK0 FS2 8 PCICLK1 14, 13, 12, 11, 9 PCICLK (6:2) 41, 40, 38, 37, 35, 34, 32, 31, 29, 28, SDRAM (13:0) 21, 20, 18 SDATA 24 SCLK CPU2.5_3.3# 25 24_48MHz ...

Page 3

... Third party brands and names are the property of their respective owners serial interface information How to Read: ACK ACK ACK ACK ACK ACK ACK ACK ACK ACK ICS9248-126 How to Read: Controller (Host) ICS (Slave/Receiver) Start Bit Address D3 (H) ACK Byte Count ACK Byte 0 ACK Byte 1 ...

Page 4

... ICS9248-126 Serial Configuration Command Bitmap ...

Page 5

... ICS9248-126 ...

Page 6

... ICS9248-126 Absolute Maximum Ratings Electrical Characteristics - Input/Supply/Common Output Parameters 70C; Supply Voltage PARAMETER SYMBOL Input High Voltage V IH Input Low Voltage V IL Operating I DD3.3OP66 Supply Current I DD3.3OP100 I DD3.3OP133 Input frequency Input Capacitance INX 1 Transition Time T trans ...

Page 7

... VO=VDD*(0.5) VO=VDD*(0. - 1.25 V CPU, SDRAM Synchronous 1.25 V CPU, SDRAM Asynchronous T ICS9248-126 MIN TYP MAX UNITS 10 36 2.85 V 0.31 0.4 V -45 - 0.4 1. 0 80.8 175 ...

Page 8

... ICS9248-126 Electrical Characteristics - 48MHz, REF_0 70C 3.3 V +/-5 PARAMETER SYMBOL 1 Output Impedance R DSP1 1 Output Impedance R DSP1 Output High Voltage V OH2 Output Low Voltage V OL2 Output High Current I OH2 Output Low Current I OL2 1 Rise Time 48MHz Fall Time 48MHz ...

Page 9

... V =V *( ICS9248-126 MIN TYP MAX UNITS 2.4 3.3 V 0.17 0.4 V -62 - 1.62 2.2 ns 1. 200 500 ps -350 306 350 ps MIN ...

Page 10

... ICS9248-126 Shared Pin Operation - Input/Output Pins Programming Header Via to Gnd Device Pad Third party brands and names are the property of their respective owners. Via to VDD 2K 8.2K Clock trace to load Series Term. Res. Fig. 1 ...

Page 11

... Routed Power = Ground Connection Key (component side copper) = Ground Plane Connection = Power Route Connection = Solder Pads = Clock Load ICS9248-126 Ferrite C2 Bead 22µF/20V Tantalum VDD 48 2.5V Power Route Clock Load ...

Page 12

... ICS9248-126 Ordering Information ICS9248yF-126-T ICS XXXX PPP - T Third party brands and names are the property of their respective owners. SY MBOL In Millimeters COMMON DIMENSIONS COMMON DIMENSIONS MIN 2.413 2.794 A 1 0.203 0.406 b 0.203 0.343 c 0.127 0.254 SEE V A RIA TIONS D E 10.033 10 ...

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