DSC557-0334SI0

Overview

The DSC557-0334SI0 is a two-output PCI Express clock generator from Microchip Technology, designed for PCIe Gen1 through Gen4 applications. It utilizes silicon MEMS technology to generate a stable 100 MHz differential clock without requiring an external 25 MHz crystal. The device supports HCSL and LVDS output formats, operates within a supply voltage range of 2.25V to 3.6V, and functions across an industrial temperature range of -40°C to +85°C. It features dedicated output enable/disable control and offers low power consumption with excellent shock and vibration immunity.

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 independent enable/disable control
• Qualified to MIL-STD-883 standards for high shock and vibration immunity

Applications

• Communications and Networking (Ethernet, Routers, Switches)
• Storage Systems (SAN, NAS, SSD)
• Embedded Applications (Industrial, Medical, Avionics)

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System to confirm output formats, package type, temperature grade, and frequency stability. Ensure the selected variant matches the required PCB footprint and environmental operating conditions for the target design.

Selection Notes

Select this component for designs requiring compliance with PCIe Gen1-4 timing standards while minimizing board space and eliminating external crystals. Consider the available output format combinations (HCSL/LVDS) and verify that the 14-lead QFN or 16-lead TSSOP package aligns with the layout constraints.

Part Context

The DSC557-03 series replaces traditional quartz and SAW oscillators in PCIe systems. By integrating the MEMS resonator directly into the IC, it reduces component count and improves reliability. This family is specifically engineered to meet the stringent jitter and phase noise requirements of modern high-speed serial interfaces.

Replacement Considerations

The datasheet indicates that the DSC557-03 can serve as a direct replacement for existing ICS557-03 clock generators. Verify pin compatibility and electrical parameters when substituting legacy quartz-based solutions.