DSA557-0344FI0TVAO

Overview

The Microchip Technology DSA557-0344FI0TVAO is a PCI Express clock generator utilizing silicon MEMS technology. It provides two 100 MHz differential outputs with HCSL, LVCMOS, or LVDS formats. The device operates within a supply voltage range of 2.25V to 3.63V and supports an operating temperature range of -40°C to +85°C (Automotive Grade 3). Packaged in a compact 14-VFQFN with an exposed pad, it integrates a MEMS resonator, eliminating the need for external crystals. Key electrical parameters include a typical supply current of 60 mA when enabled and period jitter of 2.5 ps RMS.

Feature Summary

• AEC-Q100 qualified for Automotive Grade 3 (-40°C to +85°C)
• Complies with PCIe Gen1/2/3/4 Common Clock specifications
• Integrated MEMS resonator eliminates external 25 MHz crystal requirement
• Dedicated Output Enable (OE) pins for individual clock output control

Applications

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

Procurement Notes

Verify the specific ordering suffix 'I' confirms the -40°C to +85°C temperature range and 'T' indicates tape and reel packaging. Confirm the '44' output format code matches the required HCSL/LVCMOS/LVDS configuration against the datasheet Product Identification System. Ensure compatibility with the 14-Lead QFN package dimensions for PCB layout.

Selection Notes

Select this component for designs requiring two independent 100 MHz PCIe clocks with low jitter and high reliability. The DSA557-03 variant fits space-constrained automotive applications due to its small footprint. Verify that the required output logic levels (HCSL, LVDS, or LVCMOS) align with the receiver inputs, as the part number suffix determines the specific output format.

Part Context

This device belongs to the DSA557 series of multiple-output MEMS PCIe clock generators. The DSA557-03 specifically offers two outputs, whereas the DSA557-04 and DSA557-05 provide three and four outputs respectively. All variants share similar MEMS-based reliability advantages over traditional quartz oscillators, including superior shock and vibration immunity.

Replacement Considerations

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