DSC557-0333FI0T

Overview

The DSC557-0333FI0T is a two-output PCI Express clock generator from Microchip Technology, utilizing silicon MEMS technology to eliminate the need for external quartz crystals. It provides 100 MHz differential LVDS outputs compliant with PCIe Gen1 through Gen4 common clock specifications. The device operates within a supply voltage range of 2.25V to 3.6V and supports an industrial temperature range of -40°C to +85°C. Packaged in a compact 14-VFQFN (2.5 mm x 3.2 mm) surface-mount case, it features an active-high Output Enable pin and integrated phase noise performance suitable for high-speed serial communication applications.

Feature Summary

• Two-output architecture generating 100 MHz differential LVDS signals compliant with PCIe Gen1/2/3/4 standards
• Integrated MEMS resonator removes requirement for external 25 MHz crystal components
• Active-high Output Enable (OE) pin allows individual output control
• Industrial temperature grade (-40°C to +85°C) with ±100 ppm frequency stability

Applications

• PCI Express compliant system designs requiring common clock generation
• Ethernet networking equipment including routers, switches, and gateways
• Storage area networks (SAN), network attached storage (NAS), and solid-state drives (SSD)
• Industrial automation and medical embedded systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's Product Identification System documentation to confirm package type, temperature range, and media format. Ensure the design accommodates the 14-VFQFN footprint dimensions and thermal pad requirements specified in the datasheet. Confirm that the LVDS output format aligns with the target receiver input specifications.

Selection Notes

Select this component when a dual-channel 100 MHz clock source is required for PCIe interfaces without using discrete crystals. Compare jitter performance metrics, such as RMS period jitter and integrated phase noise, against the specific PCIe generation being implemented. Consider the power consumption benefits relative to competing devices if low energy usage is a priority for the application.

Part Context

This part belongs to the DSC557-03 series, which offers two-output configurations in a space-saving 14-lead QFN package. Other variants in the family include the DSA557-03 for automotive qualification and models with different output formats like HCSL or LVCMOS. The series replaces traditional quartz oscillators to improve reliability and reduce board space in communications and storage applications.

Replacement Considerations

Direct replacements include other DSC557-03 variants with matching LVDS outputs and industrial temperature ratings. Cross-reference the DSA557-03 series if automotive AEC-Q100 qualification is required instead of standard industrial grade.