9SQL4954BNLGI

Application Specific Clock/Timing Overview

The 9SQL4954 is a server clock generator from the IDT 'Lite' family, designed as a derivative of the CK420BQ. It generates four 100MHz Low-Power HCSL (LP-HCSL) outputs and one 3.3V LVCMOS REF output. The device supports PCIe Common Clock and Independent Reference architectures for Gen1 through Gen4 compliance. It features integrated 85Ω terminations, individual OE# pins for power management, and spread spectrum capabilities. Operating on a 3.135V to 3.465V supply, it utilizes a 25MHz crystal input and is housed in a 32-VFQFPN package.

Application Specific Clock/Timing Feature Summary

• Generates four 100MHz LP-HCSL differential BCLK outputs with integrated 85Ω terminations
• Supports PCIe Gen1-4 Common Clock and Independent Reference architectures
• Includes one 3.3V LVCMOS REF output with Wake-On-LAN support
• Features pin-selectable spread spectrum (-0.25%, -0.5%, or off) and individual OE# control

Application Specific Clock/Timing Applications

• PCIe Gen1, Gen2, Gen3, and Gen4 server clock generation
• CPU/SRC clock distribution
• QPI/UPI compliant systems
• SAS 12G applications (with SSC off)

Application Specific Clock/Timing Procurement Notes

Verify component authenticity through authorized channels. Confirm RoHS3 compliance status. Check for moisture sensitivity level (MSL 3) handling requirements during storage and assembly. Ensure the 32-VFQFPN package dimensions match board layout specifications.

Application Specific Clock/Timing Selection Notes

Select this component for designs requiring low-power LP-HCSL outputs with integrated termination resistors to save board space. Ensure the system supports a 25MHz crystal input. Verify that the required spread spectrum levels (-0.25% or -0.5%) align with EMI mitigation needs. Confirm compatibility with SMBus configuration if dynamic control is required.

Application Specific Clock/Timing Part Context

The 9SQL4954 belongs to the IDT 'Lite' family of server clocks, serving as a derivative of the CK420BQ. It offers reduced power consumption compared to its predecessor while maintaining compliance with high-speed interface standards. The device is manufactured by Integrated Device Technology, now part of Renesas Electronics Corporation.

Application Specific Clock/Timing Replacement Considerations

Direct replacement options are not explicitly listed in the provided documentation. Consider evaluating other members of the 9SQL49xx series or the CK420BQ derivative family for functional equivalence. Verify pinout and electrical parameter compatibility before substitution.