DSC557-0343FI0

Overview

The DSC557-0343FI0 is a two-output PCI Express clock generator from the DSC557-03 series, manufactured by Microchip Technology. It utilizes silicon MEMS technology to provide a 100 MHz differential output without requiring an external 25 MHz crystal. The device supports PCIe Gen1 through Gen4 specifications and features HCSL and LVDS output formats. It operates within a supply voltage range of 2.25V to 3.6V and is rated for an industrial temperature range of -40°C to +85°C. The component is housed in a space-saving 14-VFQFN package (2.5x3.2 mm) with an exposed pad.

Feature Summary

• Complies with PCIe Gen1/2/3/4 Common Clock specifications
• Integrated MEMS resonator eliminates the need for an external 25 MHz crystal
• Provides 100 MHz outputs in HCSL and LVDS formats
• Qualified to MIL-STD-883 for shock and vibration immunity

Applications

• Ethernet (1G, 10GBASE-T/KR/LR/SR)
• Storage Area Networks (SAN), Network Attached Storage (NAS), SSDs
• Routers, Switches, Gateways, and VoIP systems
• Industrial, Medical, and Avionics embedded applications

Procurement Notes

Verify the specific ordering suffix 'I' confirms the -40°C to +85°C industrial temperature rating and 'FI0' indicates the 14-QFN package with HCSL/LVDS outputs. Confirm the manufacturing lot date code against project requirements. Ensure ESD precautions are taken during handling as the device is sensitive to electrostatic discharge. Check for any recent Product Change Notifications regarding packaging or marking updates.

Selection Notes

Select this model when a dual-output PCIe clock generator is required for Gen1 to Gen4 interfaces. The DSC557-0343FI0 is suitable for designs needing HCSL and LVDS outputs simultaneously. Consider the 14-VFQFN footprint if board space is limited. Verify that the 100 ppm frequency stability meets system jitter requirements. Ensure the power supply voltage remains within the 2.25V to 3.6V range for proper operation.

Part Context

This component belongs to the DSC557-03 family of two-output PCIe clock generators. It serves as a direct replacement for legacy crystal-based solutions like the ICS557-03. The device leverages MEMS technology to improve reliability and reduce sensitivity to mechanical stress compared to traditional quartz oscillators. It is part of Microchip's broader portfolio of timing solutions for high-speed serial communication standards.

Replacement Considerations

The datasheet identifies the ICS557-03 as a compatible legacy device for direct replacement. When substituting, verify that the target application can accommodate the removal of the external 25 MHz crystal and associated load capacitors. Ensure the new design supports the 14-VFQFN pinout and thermal pad connection requirements specified in the datasheet.