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參數(shù)資料
| 型號： | ICS9248YF-195LF-T |
| 英文描述： | Frequency Generator & Integrated Buffers for PENTIUM II/III & K6 |
| 中文描述： | 頻率發(fā)生器 |
| 文件頁數(shù)： | 1/16頁 |
| 文件大小： | 160K |
| 代理商： | ICS9248YF-195LF-T |
Integrated
Circuit
Systems, Inc.
ICS9248-195
0375D—02/02/04
Block Diagram
Frequency Generator & Integrated Buffers for PENTIUM
II
/
III
TM
& K6
Pin Configuration
48-Pin SSOP and TSSOP
* Internal Pull-up Resistor of 120K to VDD
VDDREF
*SPREAD/REF0
GNDREF
X1
X2
VDDPCI
*CPU2.5_3.3#/PCICLK_F
*FS3/PCICLK0
GNDPCI
*SEL24_48#/PCICLK1
*SELPCIE_6#/PCICLK2
PCICLK3
PCICLK4
VDDPCI
BUFFER IN
GNDPCI
PCICLK5
PCICLK_E
PCICLK6/
VDDCOR
PCI_STOP#
*Vtt_PWRGD/PD#
GND48
SDATA
SCLK
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*
I
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
Recommended Application:
440BX, MX, VIA PM/PL/PLE 133 style chip set, with
Coppermine or Tualatin processor, for note book
applications.
Output Features:
4 - CPUs @ 2.5V/3.3V
including 1 free running CPUCLK_F
9 - SDRAM @ 3.3V
7 - PCI @ 3.3V, including 1 free running PCICLK_F
1 - PCI Early @ 3.3V
1 - 48MHz, @ 3.3V fixed.
1 - 24/48MHz @ 3.3V
2 - REF @3.3V, 14.318MHz.
Features:
Up to 137MHz frequency support
97MHz to support high-end AMD processor.
Support power management: CLK, PCI, stop and
Power down Mode from I
2
C programming.
Spread spectrum for EMI control
Uses external 14.318MHz crystal
FS pins for frequency select
Functionality
2
t
B
t
B
0
0
0
0
0
0
0
0
0
1
0
1
0
1
0
1
1
0
1
0
1
0
1
0
1
1
1
1
1
1
1
1
6
5
t
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
B
4
t
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
B
K
L
7
0
7
3
7
0
0
3
7
0
0
3
0
0
3
0
C
U
6
6
0
0
1
6
6
3
3
1
6
6
0
0
1
0
0
1
3
3
1
6
6
0
0
1
0
9
3
3
1
0
7
0
0
1
3
3
1
0
4
1
P
C
K
L
3
3
3
3
3
3
3
3
3
3
0
3
0
0
3
0
C
I
C
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
3
P
3
3
3
3
3
3
3
3
3
3
0
3
0
0
3
0
Key Specifications:
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
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