SPH0644LM4H

Overview

The SPH0644LM4H is a digital MEMS microphone from the SiSonic Cornell series, manufactured by Syntiant. It features an omnidirectional acoustic port located at the bottom of the package. The device operates within a supply voltage range of 1.6 V to 3.6 V and draws a typical operating current of 1.4 mA. Key electrical specifications include a sensitivity of -37 dB ±1 dB at 94 dB SPL and a signal-to-noise ratio (SNR) of 65.5 dBA. The frequency response spans from 20 Hz to 10 kHz. The component is housed in a rectangular LGA-5 package with dimensions of 3.5 mm x 2.65 mm x 1.08 mm.

Feature Summary

• Digital PDM output interface for direct connection to audio processors
• Bottom-port acoustic design suitable for constrained form factors
• High signal-to-noise ratio for clear audio capture in noisy environments

Applications

• Voice recognition systems requiring high-fidelity input
• Smart home devices and IoT sensors
• Mobile communication handsets

Procurement Notes

Verify component status as the manufacturer indicates this part may be obsolete or subject to discontinuation. Confirm availability through authorized distributors and check for end-of-life notifications prior to finalizing procurement plans. Ensure compliance with RoHS standards and verify packaging options such as cut tape or reel availability for production needs.

Selection Notes

Select this model when a compact digital microphone with bottom-port configuration is required. The low power consumption and high SNR make it suitable for battery-operated applications. Ensure the host system supports PDM interfaces and matches the voltage requirements of 1.6 V to 3.6 V for proper operation.

Part Context

This component belongs to the SiSonic Cornell series of MEMS microphones produced by Syntiant. The series is designed for digital audio applications, offering integrated analog-to-digital conversion within the silicon package. The SPH0644LM4H represents a specific variant optimized for omnidirectional sound pickup in small electronic devices.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official Syntiant resources for potential cross-references or updated product lines if this component is discontinued.