ICS950908 Datasheet, PDF (2/22 Pages) Integrated Circuit Systems – Programmable Timing Control Hub™ for P4™

Integrated
Circuit
Systems, Inc.
ICS950908
Preliminary Product Preview
General Description
The ICS950908 is a single chip clock solution for desktop designs using the VIA Pro266/PN266/CLE266/CM400 chipset with
PC133 or DDR memory.
The ICS950908 is part of a whole new line of ICS clock generators and buffers called TCH™ (Timing Control Hub). This part
incorporates ICS's newest clock technology which offers more robust features and functionality. Employing the use of a
serially programmable I²C interface, this device can adjust the output clocks by configuring the frequency setting, the output
divider ratios, selecting the ideal spread percentage, the output skew, the output strength, and enabling/disabling each
individual output clock. M/N control can configure output frequency with resolution up to 0.1MHz increment.
Block Diagram
(1:0)
Mode
SEL_SDR/DDR#
BUF_IN
SEL_408/K7#
Power Groups
Pin Number
VDD
GND
55
2
5
9
16
13
22
19
23
24
34, 40
33, 39
50
47
51
54
0653A—07/26/04
Description
Xtal, Ref
AGP [0:2], CPU digital, CPU PLL
PCI [0:5], PCI_F outputs
48MHz, Fix Digital, Fix Analog
Master clock, CPU Analog
DDR/SDR outputs
2.5V CPUT_CS output
3.3V CPUT/C & CPUOD_T/C
2
FBOUT