9SQL4954BNLGI8

Overview

The 9SQL4954BNLGI8 is a clock generator from the IDT 'Lite' family, manufactured by Renesas Electronics. It generates four 100MHz outputs designed to exceed CK420BQ requirements for server applications. The device supports PCIe Common Clock and Independent Reference architectures with integrated 85Ω terminations. Key specifications include cycle-to-cycle jitter under 50ps, output-to-output skew under 50ps, and phase jitter below 2ps rms (12k-20M). It operates on a 3.135V to 3.465V supply within an industrial temperature range of -40°C to 85°C.

Feature Summary

• Generates four 100MHz Low-Power HCSL differential pairs with integrated 85Ω output terminations.
• Includes a 25MHz LVCMOS REF output supporting Wake-On-LAN functionality.
• Supports PCIe Gen1 through Gen4 Common Clock and Gen2/Gen3 Independent Reference architectures.
• Features pin-selectable spread spectrum options (0%, -0.25%, or -0.5%) and individual OE# pins for power management.

Applications

• PCIe Gen1, Gen2, Gen3, and Gen4 Server Clocking
• CPU/SRC Clock Generation
• SAS 12G Compliant Systems

Procurement Notes

Verify the component's origin as IDT products are now managed by Renesas Electronics. Confirm that the specific ordering suffix matches the required package and environmental specifications. Ensure compatibility with the SMBus interface if dynamic configuration is needed for the device.

Selection Notes

Select this component when designing systems requiring low-power HCSL outputs with integrated impedance matching to reduce external components. It is suitable for applications needing multiple independent clock outputs with individual enable controls and support for various PCIe clock architectures.

Part Context

This part belongs to the 9SQL49xx series, specifically derived from the CK420BQ architecture. It is marketed as a 'Lite' family solution offering reduced power consumption compared to its predecessor while maintaining compliance with high-speed serial interface standards.

Replacement Considerations

Direct replacements should be sought within the 9SQL49xx series or compatible CK420BQ derivatives. Verify pinout and electrical characteristics match before substitution.

FAQ

What is the maximum phase jitter for the BCLK outputs?

The 12kHz to 20MHz phase jitter is typically 2ps rms with Spread Spectrum Clocking (SSC) turned off.

How is the SMBus address selected?

The SMBus address is latched based on the state of the SADR pin when the CKPWRGD_PD# signal is first asserted high.

Does the device support Wake-On-LAN?

Yes, the 25MHz REF output supports Wake-On-LAN mode, allowing the reference clock to remain active during power-down states.