DSA557-0344FI0VAO

Overview

The DSA557-0344FI0VAO 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 outputs compliant with PCIe Gen1/2/3/4 common clock specifications. The device operates within a supply voltage range of 2.25V to 3.63V and supports HCSL, LVDS, and LVCMOS output formats. Packaged in a compact 14-lead QFN (2.5x3.2 mm), it is qualified to AEC-Q100 Automotive Grade 3 standards, ensuring reliable operation across an extended temperature range of -40°C to +85°C.

Feature Summary

• Automotive AEC-Q100 Qualified for Grade 3 (-40°C to +85°C)
• Integrated MEMS Resonator Eliminates External 25 MHz Crystal
• Complies with PCIe Gen1/2/3/4 Common Clock Specifications
• Supports HCSL, LVDS, and LVCMOS Output Formats

Applications

• Automotive Infotainment Systems
• Automotive Advanced Driver Assistance Systems (ADAS)
• Autonomous Driving Applications
• In-Vehicle Network Interfaces

Procurement Notes

Verify the specific ordering suffix 'I' corresponds to the -40°C to +85°C temperature range and 'F' indicates the 14-Lead QFN package as defined in the Product Identification System. Confirm that the stability rating associated with the suffix '0' matches the required ±100 ppm specification for the target application environment.

Selection Notes

Select this component when designing automotive systems requiring low-jitter 100 MHz clocks without external crystal dependencies. Ensure the design accommodates the 14-lead QFN footprint and utilizes dedicated OE pins for output enable/disable control. Verify power supply filtering requirements, recommending a 0.1 μF capacitor per VDD pin to maintain signal integrity.

Part Context

This part belongs to the DSA557 series, which includes variants with three (DSA557-04) and four (DSA557-05) outputs. While the DSC557 series serves commercial and industrial markets, the DSA557 series is specifically engineered for automotive applications, offering enhanced reliability metrics such as higher Mean Time To Failure (MTF) compared to traditional quartz oscillators.

Replacement Considerations

The DSC557-03 series serves as a direct functional replacement for non-automotive designs. For existing quartz-based solutions, the DSA557-03 eliminates the need for external 25 MHz crystals, reducing board space and improving shock/vibration immunity.