SPM0423HD4H-WB

Overview

The SPM0423HD4H-WB is a digital MEMS microphone manufactured by Syntiant, part of the SiSonic series. It features an omnidirectional acoustic port and outputs PDM signals. The device operates within a frequency range of 100 Hz to 10 kHz with a sensitivity of -26dB ±3dB @ 94dB SPL. It requires an operating supply voltage between 1.6 V and 3.6 V and draws a supply current of 600 µA. The component has a rectangular shape with dimensions of 0.186 inches in length, 0.148 inches in width, and a maximum height of 0.053 inches (1.35mm).

Feature Summary

• Digital PDM output interface for direct connection to processors.
• Omnidirectional sound pickup pattern for consistent audio capture.
• Low power consumption suitable for battery-operated devices.

Applications

• Voice recognition systems
• Smart home voice assistants
• Hands-free communication modules

Procurement Notes

Verify component authenticity as this part is obsolete and no longer manufactured. Check for available surplus stock from authorized distributors. Ensure compatibility with existing PCB footprints and soldering profiles. Confirm that the digital PDM interface matches the host processor requirements. Review reliability data regarding sensitivity deviation after testing conditions.

Selection Notes

Select this component for applications requiring digital MEMS microphones with low power consumption. Consider the specific sensitivity and frequency response characteristics for voice-centric designs. Evaluate the physical dimensions against space constraints in portable electronics. Verify the operating voltage range aligns with the system power supply. Assess the availability of replacement parts due to obsolescence status.

Part Context

This microphone belongs to the SiSonic series, designed for always-on voice detection and processing. It integrates MEMS technology with digital signal processing capabilities. The product line targets consumer electronics and IoT devices requiring high-quality audio input with minimal power usage.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the component is obsolete, alternative solutions must be sourced through distributor surplus channels or evaluated based on pin-compatible equivalents with similar electrical specifications.