EA-21843-C37

Microphones Overview

The EA-21843-C37 is an analog omnidirectional electret condenser microphone manufactured by Knowles. It features a compact surface-mount package with dimensions of 5.56mm x 3.98mm x 2.21mm. The device operates at a rated voltage of 1.3V and provides a sensitivity of -59dB ±3dB referenced to 74dB SPL. Its frequency response range extends from 100 Hz to 4.05 kHz, making it suitable for voice capture applications requiring precise acoustic performance in small form factors.

Microphones Feature Summary

• Omnidirectional polar pattern for uniform sound pickup
• Electret condenser transducer technology
• Analog output signal interface

Microphones Applications

• Voice recognition systems
• Consumer audio devices
• Portable communication equipment

Microphones Procurement Notes

Verify component status as sources indicate obsolete or limited availability. Confirm exact package dimensions and sensitivity tolerances against official datasheets before integration. Ensure supply chain reliability due to potential discontinuation risks associated with this specific part number variant.

Microphones Selection Notes

Select this component for designs requiring a low-profile omnidirectional microphone with defined analog output. Evaluate the 1.3V operating voltage requirement against system power rails. Consider the 100 Hz to 4.05 kHz frequency range suitability for target voice frequencies rather than full-range audio reproduction.

Microphones Part Context

This microphone belongs to the Knowles acoustics portfolio, designed for embedded audio sensing. It utilizes standard electret condenser principles within a miniature SMD footprint. The product line focuses on integrating high-sensitivity acoustic conversion into space-constrained electronic assemblies.

Microphones Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing PCB footprints and biasing circuits if considering alternative omnidirectional microphones from other manufacturers.