DSC557-0344FE0

Overview

The DSC557-0344FE0 is a two-output PCI Express clock generator from the DSC557 series, manufactured by Microchip Technology. It utilizes silicon MEMS technology to generate a 100 MHz differential clock signal without requiring an external 25 MHz crystal. The device supports HCSL and LVDS output formats and operates within a supply voltage range of 2.25V to 3.6V. Designed for commercial applications, it functions reliably between -20°C and +70°C. The component is housed in a compact 14-VFQFN package with an exposed pad, measuring 2.5 mm x 3.2 mm.

Feature Summary

• Complies with PCIe Gen1/2/3/4 Common Clock specifications
• Integrated MEMS resonator eliminates the need for an external 25 MHz crystal
• Supports HCSL and LVDS output formats with Output Enable/Disable functionality
• Qualified to MIL-STD-883 standards for excellent shock and vibration immunity

Applications

• Ethernet (1G, 10GBASE-T/KR/LR/SR, FcoE)
• Storage systems including SAN, NAS, SSD, and JBOD
• Routers, switches, gateways, VoIP, and wireless access points
• Industrial, medical, and avionics embedded applications

Procurement Notes

Verify the specific ordering suffix 'FE0' against official Microchip documentation to confirm the exact temperature grade, output format combination, and packaging type. Ensure compatibility with the target system's power supply voltage and thermal requirements before procurement.

Selection Notes

Select this component for designs requiring low jitter and high reliability in space-constrained environments. The integrated MEMS design reduces board space and improves shock resistance compared to quartz oscillators. Confirm that the commercial temperature range (-20°C to +70°C) meets the operational environment needs.

Part Context

This part belongs to the DSC557 family of PCIe clock generators. The '03' designation indicates a two-output configuration. The 'F' suffix typically denotes the 14-Lead QFN package, while 'E' specifies the commercial temperature range. This model replaces older quartz-based solutions to accelerate product development.

Replacement Considerations

The datasheet notes that the DSC557-03 can directly replace existing ICS557-03 clock generators. Verify pinout compatibility and electrical characteristics when substituting other MEMS or quartz clock sources.