ICS932S431A Datasheet, PDF (4/22 Pages) Integrated Device Technology – Low drift PCIe clocks for Non-Transparent Bridging

Integrated
Circuit
Systems, Inc.
ICS932S431A
Datasheet
General Description
ICS932S431A is a main clock synthesizer for CK410B-generation Intel server platforms. ICS932S431A is driven with a
14.318MHz crystal. It generates CPU outputs up to 400MHz and PCI-Express clocks at 100. The 48 MHz USB clock is an exact
48.000 MHz clock. The ICS932S431A generates all other clocks with less the +/- 300 ppm error.
Block Diagram
X1
X2
FS(C:A)
TEST_SEL
VTT_PWRGD#/PD
SDATA
SCLK
XTAL
OSC.
FIXED PLL
DIVIDER
CPU PLL
DIVIDERS
SRC/PCI
PLL
DIVIDERS
CONTROL
LOGIC
REF(1:0)
48MHz
CPUCLK(3:0)
SRCCLK(4:0)
PCICLK(3:0), PCICLK_F(2:0)
IREF
Power Groups
Pin Number
VDD GND
53
50
1,8
2,7
15,25,28 20
35
34
12
14
47,44,38 41
1426A—11/12/09
Description
Xtal, Ref
PCICLK outputs
SRCCLK outputs
Master clock, CPU Analog
48MHz, PLL_48
CPUCLK clocks
4