ICS9250BF-27T IDT, Integrated Device Technology Inc, ICS9250BF-27T Datasheet

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ICS9250BF-27T

Manufacturer Part Number
ICS9250BF-27T
Description
IC FREQ GENERATOR/BUFFER 56-SSOP
Manufacturer
IDT, Integrated Device Technology Inc
Type
Frequency Generatorr
Datasheet
1.ICS9250BF-27T.pdf (15 pages)

Specifications of ICS9250BF-27T

Frequency - Max
133MHz
Voltage - Supply
3.135 V ~ 3.465 V
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
56-SSOP
Frequency-max
133MHz
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Output
-
Input
-
Other names
9250BF-27T
Frequency Generator and Integrated Buffers
for Celeron & PII/III
Recommended Application:
810/810E and 815 type chipset.
Output Features:
•
•
•
•
•
•
•
Features:
•
•
•
•
•
Block Diagram
FS (2:0)
IDT
SDATA
SCLK
PD#
TM
X2
X1
3 CPU (2.5V) (up to 133MHz achievable through I
9 SDRAM (3.3V) (up to 133MHz achievable
through I
7 PCI (3.3 V) @33.3MHz
2 IOAPIC (2.5V) @ 33.3 MHz
3 Hublink clocks (3.3 V) @ 66.6 MHz
2 (3.3V) @ 48 MHz (Non spread spectrum)
1 REF (3.3V) @ 14.318 MHz
Supports spread spectrum modulation,
0 to -0.5% down spread.
I
Efficient power management scheme through PD#
Uses external 14.138 MHz crystal
Alternate frequency selections available through I
control.
2
Frequency Generator and Integrated Buffers for Celeron & PII/III
C support for power management
XTAL
OSC
PLL2
2
C)
Control
Config
Logic
Reg
Spectrum
Spread
PLL1
/2
/2
/3
/2
TM
REF0
3
3
8
6
2
2
VDDL
CPU66/100/133 (2:0)
3V66 (2:0)
SDRAM (7:0)
SDRAM_F
PCICLK (5:0)
PCICLK_F
IOAPIC (1:0)
VDDL
48MHz (1:0)
2
2
C
C)
TM
1
Functionality
Power Groups
AVDD = Pin 22 Analog power for PLL
AGND = Pin 23 Analog ground
VDD48 = Pin 27 Analog power for 48MHz PLL
GND = Pin 24 Analog ground for 48MHz PLL
Pin Configuration
F
X
X
S
0
0
1
1
*FS2//REF0
2
PCICLK_F
48MHz_0
48MHz_1
PCICLK0
PCICLK1
PCICLK2
PCICLK3
PCICLK4
PCICLK5
* This input has a 50KΩ pull-down to GND.
3V66-0
3V66-1
3V66-2
GND
GND
GND
GND
GND
GND
VDD
VDD
VDD
VDD
VDD
VDD
FS0
F
X1
X2
0
0
S
1
1
1
1
1
56-Pin 300mil SSOP
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
F
1
2
3
4
5
6
7
8
9
0
0
0
S
1
1
1
0
T
e T
A
S
A
S
A
S
A
S
D
D
D
D
s i r
i t c
i t c
i t c
i t c
t s
R
R
R
R
a t
e v
e v
e v
e v
A
A
A
A
e t
M
M
M
M
C
C
C
C
P
P
P
P
=
=
=
=
U
U
U
U
1
1
1
1
F
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
=
=
=
=
0 0
0 0
3 3
0 0
ICS9250-27
u
n
6 6
1
1
1
M
M
M
M
0 0
3 3
3 3
t c
M
H
H
H
H
DATASHEET
o i
M
M
M
z
z
z
z
H
GND
IOAPIC0
IOAPIC1
VDDL
CPUCLK0
VDDL0
CPUCLK1
CPUCLK2
GNDL
GND
SDRAM0
SDRAM1
VDD
SDRAM2
SDRAM3
GND
SDRAM4
SDRAM5
VDD
SDRAM6
SDRAM7
GND
SDRAM_F
VDD
PD#
SCLK
SDATA
FS1
n
H
H
H
z
z
z
z
0395F—01/25/10

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ICS9250BF-27T Summary of contents

Page 1

Frequency Generator and Integrated Buffers for Celeron & PII/III Recommended Application: 810/810E and 815 type chipset. Output Features: • 3 CPU (2.5V) (up to 133MHz achievable through I • 9 SDRAM (3.3V) (up to 133MHz achievable 2 through I C) ...

Page 2

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III General Description The ICS9250- single chip clock solution for 810/810E and 815 type chipset. It provides all necessary clock signals for such a system. Spread spectrum may be ...

Page 3

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Power Down Waveform Note 1. After PD# is sampled active (Low) for 2 consective rising edges of CPUCLKs, all the output clocks are driven Low on their next High to ...

Page 4

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Truth Table ...

Page 5

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Byte 2: Control Register (1 = enable disable ...

Page 6

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Byte 4: Reserved Register (1 = enable disable ...

Page 7

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Absolute Maximum Ratings Core Supply Voltage I/O Supply Voltage Logic Inputs Ambient Operating Temperature Storage Temperature Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the ...

Page 8

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Electrical Characteristics - CPU 70C 2.5 V +/-5 DDL PARAMETER SYMBOL 1 Output Impedance R DSP2B 1 Output Impedance R DSN2B Output ...

Page 9

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Electrical Characteristics - IOAPIC 70C 2.5 V +/-5 DDL PARAMETER SYMBOL 1 Output Impedance R DSP4B 1 Output Impedance R DSN4B Output ...

Page 10

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Electrical Characteristics - PCI 70C 3.3 V +/-5 PARAMETER SYMBOL 1 Output Impedance R DSP1 1 Output Impedance R DSN1 Output ...

Page 11

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Electrical Characteristics - 48MHz_1 (Pin 26 70C 3.3 V +/-5 PARAMETER SYMBOL 1 Output Impedance R DSP3 1 Output Impedance R ...

Page 12

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III 0ns CPU 66MHz CPU 100MHz CPU 133MHz SDRAM 100MHz SDRAM 133MHz 3.3V 66MHz PCI 33MHz IOAPIC 33MHz REF 14.318MHz USB 48MHz Frequency Generator and Integrated Buffers for Celeron & PII/III ...

Page 13

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III General I The information in this section assumes familiarity with I How to Write: • Controller (host) sends a start bit. • Controller (host) sends the write address D2 • ...

Page 14

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Ordering Information 9250yF-27LF-T Example: XXXX PPP Frequency Generator and Integrated Buffers for Celeron & PII/III TM IDT TM 56-Lead, 300 m il Body, 25 ...

Page 15

ICS9250-27 Frequency Generator and Integrated Buffers for Celeron & PII/III Revision History Rev. Issue Date Description C 8/17/2005 Added LF Ordering Information 10/25/2005 Removed "Contact ICS for 9/11/2008 Corrected typo on pin# 28/29 pin description F ...

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