EA-21842-035

Microphones Overview

The Knowles EA-21842-035 is an omnidirectional electret microphone with dimensions of 5.56 x 3.98 x 2.21 mm. It features a sensitivity of -59 dB and a side port configuration. The device operates at 1.3 V, draws 50 uA current, and has an impedance of 3.5 kΩ.

Microphones Feature Summary

• Omnidirectional acoustic response for uniform sound capture
• Electret transducer technology for stable performance
• Side port design facilitating specific acoustic routing

Microphones Applications

• Consumer audio devices requiring compact microphones
• Portable electronic equipment with limited board space
• Voice recognition modules in small form factor devices

Microphones Procurement Notes

Verify the specific suffix code against official Knowles documentation to confirm pinout and acoustic port orientation. Ensure RoHS compliance status matches project requirements. Confirm package type and reel specifications if automated assembly is planned. Cross-reference datasheet revision dates to ensure parameter consistency.

Microphones Selection Notes

Select this component when a low-profile omnidirectional microphone is required. The side port configuration suits designs needing specific acoustic channel alignment. Verify that the -59 dB sensitivity meets the system's signal-to-noise ratio needs. Check operating voltage compatibility with the host circuit's power supply rails.

Microphones Part Context

This part belongs to the Knowles EA series of miniature microphones. The series focuses on providing high-performance audio sensing in ultra-small packages suitable for modern portable electronics. The EA-21842-035 variant specifically utilizes an electret element with a defined side port geometry.

Microphones Replacement Considerations

Consult official Knowles substitution guides for verified equivalents. Generic replacements may differ in sensitivity or port location. Validate mechanical footprint and electrical parameters before switching.