DSC557-054444KI2

Overview

The DSC557-054444KI2 is a crystal-less, four-output PCI Express clock generator utilizing silicon MEMS technology. It meets Gen1, Gen2, and Gen3 specifications with a maximum frequency of 460MHz. The device operates on a supply voltage range of 2.25V to 3.6V and supports HCSL output formats across all four channels. It features an operating temperature range of -40°C to 85°C and is housed in a 20-VFQFN package with an exposed pad. The integrated PLL eliminates the need for external quartz crystals, enhancing reliability.

Feature Summary

• Crystal-less design using proven silicon MEMS technology
• Four differential outputs supporting PCIe Gen1, Gen2, and Gen3 standards
• HCSL output format configuration for all channels
• Wide supply voltage range from 2.25V to 3.6V

Applications

• Communications and Networking equipment including Ethernet and Routers
• Storage solutions such as SAN, NAS, and SSDs
• Embedded applications in Industrial, Medical, and Avionics systems

Procurement Notes

Verify the specific ordering suffix KI2 against official Microchip documentation to confirm the exact temperature grade (-40°C to 85°C) and output format (HCSL). Ensure compatibility with the 20-VFQFN footprint and check for any recent production change notices regarding packaging or sourcing before procurement.

Selection Notes

Select this component when a crystal-less solution is required for PCIe Gen1/2/3 interfaces. The DSC557-05 series offers mixed output format options; ensure the KI2 suffix matches the required HCSL configuration. Consider the 20-QFN package size and thermal requirements for the target PCB layout.

Part Context

The DSC557-05 belongs to the DSC557 family of MEMS-based clock generators designed to replace traditional quartz oscillators. This series provides enhanced shock and vibration immunity compared to piezoelectric devices. The model specifically targets high-reliability applications in communications and storage where stability and low jitter are critical.

Replacement Considerations

Direct replacements within the same family include DSC557-054444KE0 (Commercial temp) and DSC557-054444KL0 (Ext. Industrial temp) with identical pinouts and functions but different temperature ranges.