EA-21842-000

Microphones Overview

The Knowles EA-21842-000 is an analog electret condenser microphone with omnidirectional characteristics. It features a compact surface-mount package measuring 5.56 mm in length, 3.98 mm in width, and 2.21 mm in depth. The device operates with a sensitivity of -59 dB ±3dB referenced at 74 dB SPL. Its frequency response extends from 100 Hz to 4.8 kHz. Electrical specifications include a maximum supply current of 50 µA and an impedance of 3.5 kΩ.

Microphones Feature Summary

• Omnidirectional acoustic design for uniform sound capture
• Electret condenser transducer technology
• Compact surface-mount form factor

Microphones Applications

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

Microphones Procurement Notes

Verify the specific suffix against official Knowles documentation to confirm exact electrical tolerances and packaging configurations. Ensure compatibility with existing PCB footprints and soldering profiles. Cross-reference datasheet revisions to confirm material compliance and process change notifications prior to final procurement authorization.

Microphones Selection Notes

Select this component when a low-profile omnidirectional microphone is required for space-constrained designs. Evaluate the 4.8 kHz upper frequency limit against application bandwidth needs. Confirm that the 3.5 kΩ impedance matches the input requirements of the associated audio processing circuitry.

Microphones Part Context

This part belongs to the Knowles EA series of microphones. It shares physical dimensions with variants such as EA-21842-012 but differs in specific electrical parameters or porting configurations. The series represents standard electret condenser solutions for general-purpose audio sensing applications.

Microphones Replacement Considerations

EA-21842-012 is listed in related documentation. Verify functional equivalence through direct datasheet comparison before substitution.