DSC557-0334FI1T

Overview

The Microchip Technology DSC557-0334FI1T is a two-output PCI Express clock generator utilizing silicon MEMS technology. It provides 100 MHz differential clocks compliant with PCIe Gen1, Gen2, Gen3, and Gen4 specifications. The device eliminates the need for an external 25 MHz crystal, integrating the resonator internally to enhance reliability. It operates within a supply voltage range of 2.25V to 3.6V and supports HCSL and LVDS output formats. Packaged in a space-saving 14-lead QFN (2.5 mm x 3.2 mm), it functions across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Complies with PCIe Gen1/2/3/4 Common Clock Specifications
• Integrated MEMS Resonator Eliminates External 25 MHz Crystal Requirement
• Supports HCSL and LVDS Output Formats
• Industrial Temperature Range: -40°C to +85°C

Applications

• Communications and Networking Equipment
• Storage Area Networks (SAN) and Network Attached Storage (NAS)
• Embedded Industrial and Medical Systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System documentation to confirm output format combinations, frequency stability tolerance, and media type. Ensure compatibility with the required operating temperature grade and package marking requirements before procurement.

Selection Notes

Select this component for designs requiring low-jitter differential clocks without external crystals. Confirm that the available output formats (HCSL/LVDS) match the target interface requirements. Verify that the 14-lead QFN footprint fits the PCB layout constraints and that the power supply filtering meets the specified 0.1 μF capacitor requirement for stable operation.

Part Context

This part belongs to the DSC557-03 series, which offers two-output configurations. Other variants in the family include models with different output format combinations (LVCMOS, LVDS, HCSL), extended industrial temperature ranges (-40°C to +105°C), commercial grades, and alternative packaging options such as tubes or tape-and-reel media.

Replacement Considerations

Direct replacements within the same family include DSC557-03 variants with different suffixes indicating varied output formats, temperature grades, or packaging media. Cross-family substitution requires verification of pinout compatibility and electrical parameter alignment.