ICS951601 Datasheet, PDF (2/9 Pages) Integrated Circuit Systems – General Purpose Frequency Timing Generator

ICS951601
Preliminary Product Preview
Pin Descriptions
Pin number
Pin name
1
REF0
2, 13, 18, 21, 26,
33, 38, 46 ^VDD
3
X1
4
X2
9, 44
VDDA
10, 30, 36, 42 SELxx
5, 14, 17, 22, 27, _GND
32, 39, 47
6
SDATA
7
SCLK
8, 43
GNDA
24, 23, 20, 19, _{PCI1A (7:0)}
16, 15, 12, 11,
29, 28, 25 PCI1B (2:0)
35, 34, 31 PCI2A (2:0)
41, 40, 37
45
48
PCI2B (2:0)
SPREAD
48MHz
Type
OUT
PWR
IN
OUT
PWR
IN
PWR
I/O
IN
PWR
OUT
OUT
OUT
OUT
IN
OUT
Reference output
Description
3.3V Power supply
Crystal input,nominally 14.318MHz.
Crystal output, nominally 14.318MHz.
Analog 3.3V Power supply
Real time PCI output frequency selection pins
Ground pins
Data pin for I²C circuitry 5V tolerant
Clock input of I²C input
Analog ground pins
PCI clock outputs, selectable to be either
33.33 or 66.66MHz at 3.3V.
PCI clock outputs, selectable to be either
33.33 or 66.66MHz at 3.3V.
PCI clock outputs, selectable to be either
33.33 or 66.66MHz at 3.3V.
PCI clock outputs, selectable to be either
33.33 or 66.66MHz at 3.3V.
Enables Spread Spectrum, default is on.
Fixed 48MHz clock output for USB.
0663B—09/04/03
2