MP33AB01

Microphones Overview

The MP33AB01 is an omnidirectional analog MEMS microphone manufactured by STMicroelectronics. It operates on a single supply voltage ranging from 1.5 V to 3.6 V, with a typical rated voltage of 2.2 V and a supply current of 250 µA. The device features a frequency range of 100 Hz to 10 kHz and a sensitivity of -38 dB ±3 dB at 94 dB SPL. It offers a signal-to-noise ratio of 63 dB and an acoustic overload point of 125 dBSPL. The component utilizes a bottom-port pad termination in a rectangular package measuring 3.76 mm x 2.95 mm x 1.10 mm.

Microphones Feature Summary

• Omnidirectional acoustic response for uniform sound capture
• Low-power operation suitable for battery-driven devices
• High signal-to-noise ratio for clear audio quality
• Bottom-port design compliant with reflow soldering processes

Microphones Applications

• IoT sensor nodes requiring low-power audio input
• Voice recognition systems in consumer electronics
• Portable digital recording devices
• Smart home automation audio interfaces

Microphones Procurement Notes

Verify the specific suffix (e.g., TR) for packaging configuration, as the base part number may denote different reel quantities or tape specifications. Confirm RoHS compliance status and moisture sensitivity level requirements against your assembly process standards. Check for obsolescence notices, as this component has been marked as obsolete by the manufacturer. Ensure compatibility with your PCB footprint dimensions and soldering thermal profiles.

Microphones Selection Notes

Choose this model when an analog output interface is required rather than digital PDM. Select based on the need for a compact form factor with bottom-port acoustics to minimize wind noise effects. Consider the 63 dB SNR and -38 dB sensitivity for applications demanding moderate audio fidelity without complex post-processing. Verify that the 1.5 V to 3.6 V supply range aligns with your system's power rails.

Microphones Part Context

The MP33AB01 belongs to the MP33 series of silicon MEMS microphones from STMicroelectronics. These components utilize specialized micromachining processes to create high-performance audio sensors. The series is designed for integration into various electronic devices where size, power consumption, and acoustic performance are critical factors for successful implementation.

Microphones Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the product is marked obsolete, consult official STMicroelectronics channels for recommended alternatives or end-of-life notifications.