ICS932S421B Datasheet, PDF (4/23 Pages) Integrated Device Technology – PCIe Gen2 and QPI Clock for Intel-Based Servers

ICS932S421B
PCIe Gen2 and QPI Clock for Intel-Based Servers
General Description
ICS932S421B is a main clock synthesizer for CK410B-generation Intel server platforms. ICS932S421B 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 ICS932S421B generates all other clocks with less the +/- 100 ppm error.
Block Diagram
X1
XTAL
FIXED PLL
DIVIDER
X2
OSC.
REF(1:0)
48MHz
CPU PLL
DIVIDERS
CPUCLK(3:0)
FS(C:A)
TEST_SEL
VTT_PWRGD#/PD
SDATA
SCLK
SRC/PCI
PLL
DIVIDERS
CONTROL
LOGIC
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
Description
Xtal, Ref
PCICLK outputs
SRCCLK outputs
Master clock, CPU Analog
48MHz, PLL_48
CPUCLK clocks
IDT^TM PCIe Gen2 and QPI Clock for Intel-Based Servers
4
1340G—01/26/10