DATASHEET
CK420BQ DERIVATIVE SUPPORTING SRNS PCIE CLOCKING
932SQ426
General Description
Features/Benefits
The 932SQ426 is a CK420BQ derivative supporting
Separate Reference no Spread (SRnS) PCIe clocking
architectures. It uses a 25MHz crystal for maximum
performance and has 100MHz outputs tuned for
non-spreading applications to provide the most open eye
diagram on PCIe links.
• Non-spread 100MHz outputs/ Supports SRnS PCIe
architectures
• 64-pin TSSOP and VFQFPN packages; maximum space
savings
Key Specifications
• Cycle to cycle jitter: CPU/SRC/NS_SRC/NS_SAS < 50ps
• Phase jitter: PCIe Gen2 <3ps rms
• Phase jitter: PCIe Gen3 <1ps rms
Recommended Application
CK420BQ for SRnS applications
• 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 1.6.4
Output Features
• 11 - HCSL 100MHz outputs for SRnS
• 4 - NS_SAS/SRC outputs
• 4 - CPU outputs
• 3 - SRC outputs
• 1 - HCSL DOT96 output
• 1 - 3.3V 48M output
• 5 - 3.3V PCI outputs
• 1 - 3.3V 14.318M output
Block Diagram
CPU(3:0)
X1_25
X2
SRC(2:0)
PCI(4:0)
/3
Low Drift non-SS
PLL
<500ps LTJ
NS_SAS(1:0)
NS_SR
C(1:0)
DOT96
48M
Non-SS PLL
14.31818MHz
Non-SS PLL
REF14M
Test_Sel
Test_Mode
Logic
CKPWRGD#/PD
SMBDAT
SMBCLK
IREF
IDT® CK420BQ DERIVATIVE SUPPORTING SRNS PCIE CLOCKING
1
932SQ426
REV C 022916