ICS9147-14 Datasheet, PDF (2/7 Pages) Integrated Circuit Systems – Frequency Generator & Integrated Buffers for PENTIUM/ProTM

ICS9147 - 14
Pin Descriptions
PIN NUMBER
1
2
3,9,22,33,39,45
4
5
16,23,24,
27,48
6,14
7
8
10, 11, 12, 13
15
17, 18, 20, 21,
28, 29, 31, 32,
34, 35,37,38
19,30,36
25
26
40, 41, 43, 44
42
46
47
PIN NAME
VDD1
REF0
GND
X1
X2
N/C
VDD2
PCICLK_F
FS1*
PCICLK0
FS2*
PCICLK(1:4)
PCICLK5
SDRAM (0:11)
VDD3
24MHz
48MHz
FS0*
CPUCLK(0:3)
VDDL1
REF1
IOAPIC
TYPE
PWR
OUT
PWR
IN
OUT
DESCRIPTION
Ref (0:2), XTAL, 24MHz, 48MHz power supply
14.318 Mhz reference clock.
Ground
Crystal input has internal load cap and feedback
resistor from X2
Crystal output nominally 14.318MHz. Has internal load cap
- Pins are not internally connected
PWR
OUT
IN
OUT
IN
OUT
OUT
Supply for PCICLK_F and PCICLK (0:5)
Free running PCI clock
Frequency select pin. *
PCI clock output.
Frequency select pin. *
PCI clock outputs
PCI clock output.
OUT SDRAM clock outputs.
PWR
OUT
OUT
IN
OUT
PWR
OUT
OUT
Supply for SDRAM (0:11)
24MHz output clock
48MHz output clock
Frequency select pin
CPU clock outputs, powered by VDD1
Supply for CPU (0:3) and IOAPIC clock, can be 2.5 or 3.3V
14.318 Mhz reference clock.
IOAPIC clock output. Powered by VDDL1.
* Internal Pull-up Resistor of 120K to 3.3V on indicated inputs
Functionality
3.3v±10% 0-70°c
Crystal (X1, X2 = 14.3181MHz
FS2
FS1
FS0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
CPU, SDRAM(MHz)
50.0
75.0
33.3
68.5
55.0
75.0
60.0
66.8
PCICLK (MHz)
25.0
32.0
16.65
34.25
27.5
37.5
30.0
33.4
REF, IOAPIC
(MHz)
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
2