DSC557-054444KI1T

Overview

The DSC557-054444KI1T is a four-output PCI Express clock generator utilizing silicon MEMS technology. It provides four differential HCSL outputs at 100 MHz, meeting PCIe Gen1, Gen2, and Gen3 specifications. The device operates on a supply voltage of 2.25V to 3.6V with a frequency stability of ±100 ppm. It features an integrated phase noise performance suitable for high-speed data transmission. The component is housed in a 20-VFQFN package with an exposed pad and supports an industrial operating temperature range from -40°C to 85°C.

Feature Summary

• Four differential HCSL outputs compliant with PCIe Gen1/2/3 standards
• Crystal-less design using silicon MEMS technology for enhanced reliability
• Integrated PLL with ±100 ppm frequency stability over the operating temperature range
• Output Enable/Disable functionality via OE1 and OE2 pins

Applications

• Ethernet (1G, 10GBASE-T/KR/LR/SR)
• Storage Area Networks (SAN) and Network Attached Storage (NAS)
• Routers, Switches, and Gateways
• Solid State Drives (SSD)

Procurement Notes

Verify the 'I' suffix confirms the -40°C to 85°C industrial temperature rating. Confirm the '4444' code specifies all four outputs as HCSL. Ensure the 'T' suffix indicates Tape & Reel packaging. Check datasheet for specific MSL level requirements during assembly.

Selection Notes

Select this model when four synchronized 100 MHz differential clocks are required for PCIe interfaces. Verify that HCSL output format matches the receiver input requirements. Consider the ±100 ppm stability if tighter tolerance is needed, which requires a different ordering suffix.

Part Context

This part belongs to the DSC557-05 series of Crystal-less PCIe clock generators. It replaces traditional quartz oscillators by integrating the resonator on-chip. The family offers various output formats and temperature grades, with the -05 variant specifically providing four outputs.

Replacement Considerations

Direct replacements within the same family include DSC557-054444KE0 (Commercial temp) or DSC557-054444KL0 (Extended temp). Cross-family substitution requires verifying pinout compatibility and electrical parameters against the target application.