DSA557-0333FL1TVAO

Overview

The DSA557-0333FL1TVAO is a two-output automotive-grade MEMS PCI Express clock generator from Microchip Technology. 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 an extended industrial temperature range of -40°C to +105°C. It utilizes silicon MEMS technology to eliminate the need for external quartz crystals, offering high reliability and low jitter performance in a compact 14-lead QFN package.

Feature Summary

• Automotive AEC-Q100 Qualified with ±100 ppm frequency stability
• Integrated MEMS resonator eliminates external 25 MHz crystal requirement
• Supports HCSL, LVDS, and LVCMOS output formats
• Dedicated Output Enable (OE) pins for individual clock control

Applications

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

Procurement Notes

Verify the specific ordering suffix '33' corresponds to the required output format configuration (LVDS/LVCMOS/HCSL mix) as defined in the Product Identification System. Confirm the 'L' suffix indicates the -40°C to +105°C temperature grade. Ensure the 'AO' automotive suffix matches the intended qualification level for the target application.

Selection Notes

Select this component when designing for PCIe Gen1 through Gen4 interfaces requiring automotive reliability. The DSA557-03 variant is appropriate for designs needing exactly two 100 MHz outputs. Consider the 14-lead QFN footprint constraints and verify that the internal pull-up on OE pins meets the system's default enable requirements without external components.

Part Context

This part belongs to the DSA557 series, which includes the DSA557-04 (three outputs) and DSA557-05 (four outputs). All variants share the same core MEMS PLL architecture and compliance with PCIe timing standards but differ in pin count and output capacity. The DSA557-03 specifically uses a 14-lead QFN package compared to the 20-lead VQFN used by the higher-output models.

Replacement Considerations

Publicly confirmed direct substitutes are not available in the provided documentation. Designers may consider the DSC557-03 for commercial/industrial grades or the ICS557-03 for legacy replacements, though these lack the specific automotive AEC-Q100 qualification and MEMS reliability benefits of the DSA557 series.