DSA557-0344FL1TVAO

Overview

The DSA557-0344FL1TVAO is a two-output PCI Express clock generator from Microchip Technology, designed for automotive applications. It utilizes silicon MEMS technology to generate 100 MHz differential HCSL clocks without requiring an external crystal. The device complies with PCIe Gen1/2/3/4 common clock specifications and features dedicated output enable pins. It operates within a supply voltage range of 2.25V to 3.63V and supports an extended industrial temperature range of -40°C to +105°C. Packaged in a compact 14-lead VQFN (2.5x3.2 mm), it offers high reliability and low current consumption compared to quartz alternatives.

Feature Summary

• Automotive AEC-Q100 Qualified with ±100 ppm frequency stability
• Integrated MEMS resonator eliminates need for external 25 MHz crystal
• Complies with PCIe Gen1/2/3/4 Common Clock Spec
• Dedicated Output Enable (OE) pins for individual clock control

Applications

• Automotive Infotainment Systems
• Automotive ADAS
• Autonomous Driving
• In-Vehicle Network

Procurement Notes

Verify the specific ordering suffix 'TVAO' against official Microchip documentation to confirm packing options and automotive grade details. Ensure compatibility with the required temperature range (-40°C to +105°C) and output format (HCSL). Cross-reference the package type (14-VFQFN) with PCB layout guidelines provided in the datasheet.

Selection Notes

Select this component for designs requiring PCIe-compliant clocking in automotive environments. The DSA557-03 variant provides exactly two outputs; choose DSA557-04 or DSA557-05 if three or four outputs are needed. Confirm that the HCSL output format meets receiver requirements, as LVDS or LVCMOS options require different ordering suffixes.

Part Context

This part belongs to the DSA557 series of multiple-output MEMS PCIe clocks for automotive use. It replaces traditional quartz oscillators, offering improved shock and vibration immunity qualified to MIL-STD-883 standards. The series includes variants with two, three, and four outputs, all sharing similar core MEMS technology and low jitter performance.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided source material.