Document
PCIE GEN 2/3 & QPI CLOCK FOR ROMLEY-BASED SERVERS
DATASHEET
932SQ420D
General Description
The 932SQ420D is a main clock synthesizer for Romley-generation Intel based server platforms. The 932SQ420D is driven with a 25 MHz crystal for maximum performance. It generates CPU outputs of 100 or 133.33 MHz.
Recommended Application
CK420BQ
Output Features
• 4 - HCSL CPU outputs • 4 - HCSL Non-Spread SAS/SRC outputs • 3 - HCSL SRC outputs • 1 - HCSL DOT96 output • 1 - 3.3V 48M output • 5 - 3.3V PCI outputs • 1- 3.3V REF output
Block Diagram
Features/Benefits
• 0.5% down spread capable on CPU/SRC/PCI
outputs/Lower EMI
• 64-pin TSSOP and MLF packages/Space Savings
Key Specifications
• Cycle to cycle jitter: CPU/SRC/NS_SRC/NS_SAS <
50ps.
• Phase jitter: PCIe Gen2 < 3ps rms, Gen3 < 1ps rms • Phase jitter: QPI 9.6GB/s < 0.2ps rms • Phase jitter: NS-SAS < 0.4ps rms using raw phase data • Phase jitter: NS-SAS < 1.3ps rms using Clk Jit Tool 1.6.3
X1_25 X2
CPU_SRC_PCI PL.