DSC557-0333FI1T

Overview

The DSC557-0333FI1T is a two-output PCI Express clock generator from Microchip Technology, designed for PCIe Gen1 through Gen4 applications. It utilizes silicon MEMS technology to provide 100 MHz differential clocks without an external crystal. The device features HCSL outputs on both channels (CLK0 and CLK1), 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 with an exposed pad, it offers low power consumption and high shock/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
• Dual HCSL outputs at 100 MHz with Output Enable/Disable functionality
• Qualified to MIL-STD-883 for excellent shock and vibration immunity

Applications

• Communications and Networking: Ethernet, Routers, Switches, Gateways, VoIP, Wireless APs, Passive Optical Networks
• Storage Systems: SAN, NAS, SSD, JBOD
• Embedded Applications: Industrial, Medical, Avionics, Security Systems, Office Automation, Digital Signage, POS

Procurement Notes

Verify the specific output format configuration matches the '33' suffix indicating LVDS outputs if required by the design, as the local source description lists HCSL while the datasheet decoding indicates '3' corresponds to LVDS. Confirm the '1T' suffix denotes Tape & Reel packaging containing 1,000 units per reel. Ensure the operating environment falls within the specified -40°C to +85°C industrial temperature range.

Selection Notes

Select this component when designing systems requiring compliance with PCIe Gen1 through Gen4 common clock standards. The integrated MEMS technology provides superior stability and reliability compared to traditional quartz solutions. Consider the 14-QFN package for space-constrained layouts. Verify that the system power supply remains stable between 2.25V and 3.6V to ensure proper operation and jitter performance.

Part Context

This part belongs to the DSC557-03 series, which are two-output PCIe clock generators. The series includes variants with different output formats (HCSL, LVDS, LVCMOS) and temperature grades (Commercial, Industrial, Extended Industrial). The DSC557-03 specifically targets high-reliability applications where shock and vibration resistance are critical factors.

Replacement Considerations

The datasheet notes that the DSC557-03 can directly replace existing ICS557-03 clock generators. When substituting, verify pin compatibility and output signal levels. Ensure the replacement part meets the same PCIe generation requirements and environmental specifications.