SPH0644HM4H-1

Overview

The SPH0644HM4H-1 is a digital MEMS microphone from the SiSonic series, manufactured by Syntiant. It features an omnidirectional acoustic port and delivers a sensitivity of -36 dB ±1 dB at 94 dB SPL. The device operates within a voltage range of 1.6 V to 3.6 V and supports a frequency response from 50 Hz to 10 kHz. It utilizes a PDM digital output interface and is housed in a rectangular LGA package with dimensions of 3.5 mm x 2.65 mm.

Feature Summary

• Digital PDM output interface for direct connection to processors
• Omnidirectional acoustic design for uniform sound capture
• Low-voltage operation compatible with portable systems

Applications

• Voice recognition modules
• Smart home audio devices
• Portable consumer electronics

Procurement Notes

Verify component authenticity through authorized distributors or official manufacturer channels. Confirm RoHS compliance status and check for end-of-life notices prior to integration. Ensure supply chain stability as availability may vary across regions.

Selection Notes

Select this model for applications requiring high-fidelity voice capture with minimal power consumption. The digital PDM interface simplifies PCB routing compared to analog alternatives. Verify that the operating voltage range aligns with the target system's power rails.

Part Context

This component belongs to the SiSonic family of MEMS microphones, designed for embedded audio processing. It represents a shift from analog to digital sensing, reducing noise susceptibility in compact electronic designs.

Replacement Considerations

SPH0644LM4H-1 is a documented alternative part number for this component.