ICS952623 Datasheet, PDF (4/27 Pages) Integrated Circuit Systems – Programmable Timing Control Hub for Next Gen P4 processor

Integrated
Circuit
Systems, Inc.
ICS952623
Advance Information
General Description
ICS952623 follows Intel CK409 Yellow Cover specification. This clock synthesizer provides a single chip solution for next
generation P4 Intel processors and Intel chipsets. ICS952623 is driven with a 14.318MHz crystal. It generates CPU outputs up
to 200MHz. It also provides a tight ppm accuracy output for Serial ATA support.
Block Diagram
X1
XTAL
X2
PLL2
Frequency
Dividers
SCLK
SDATA
CPU_STOP#
PCI_STOP#
Vtt_PWRGD#
PD#
FS_A
FS_B
Control
Logic
Programmable
Spread
PLL1
Programmable
Frequency
Dividers
STOP
Logic
Power Groups
Pin Number
VDD GND
3
24
10,16
36
55
34
N/A
48, 42
6
25
11,17
39
54
33
53
45
Description
Xtal, Ref
3V66 [0:3]
PCICLK outputs
SRCCLK outputs
Master clock, CPU Analog
48MHz, PLL
IREF
CPUCLK clocks
48MHz, USB, DOT
REF (1:0)
CPUCLKT (2:0)
CPUCLKC (2:0)
SRCCLKT0
SRCCLKC0
3V66(4:0)
PCICLK (6:0)
PCICLKF (2:0)
I REF
0758—02/08/05
4