EA-21842-C36

Microphones Overview

The Knowles EA-21842-C36 is an omnidirectional MEMS microphone designed for high-fidelity audio capture. It features a sensitivity of -54 dBA and operates at a supply voltage of 1.3 VDC with a current rating of 50 uA. The device has an impedance of 3.5 kOhms and is optimized for operation at a frequency of 10 kHz. Its compact surface-mount package measures 5.56 mm in length, 3.98 mm in width, and 2.21 mm in depth, facilitating integration into space-constrained electronic designs.

Microphones Feature Summary

• Omnidirectional acoustic port configuration for uniform sound pickup from all directions
• Low power consumption suitable for battery-operated portable devices
• Compact surface-mount footprint enabling dense circuit board layouts

Microphones Applications

• Mobile communication handsets
• Voice recognition systems
• Portable digital recorders

Microphones Procurement Notes

Verify the specific suffix against official Knowles documentation to confirm exact sensitivity and porting specifications. Ensure compatibility with existing PCB footprints and soldering profiles. Confirm RoHS compliance status through the manufacturer's latest certification records before finalizing procurement orders.

Microphones Selection Notes

Select this component when low voltage operation and minimal current draw are critical requirements. The -54 dBA sensitivity offers a balance between noise floor and signal strength. Verify that the 3.5 kOhm impedance matches the input stage of the connected amplifier or ADC interface for optimal signal transfer.

Microphones Part Context

This model belongs to the EA series of microphones manufactured by Knowles. The series utilizes MEMS technology to provide reliable audio sensing solutions. The EA-21842-C36 variant specifically denotes the -54 dBA sensitivity level and C36 packaging or processing code within the broader product family.

Microphones Replacement Considerations

Consult official Knowles substitution guides for verified equivalents. Cross-reference pinouts and electrical characteristics carefully. Generic replacements may not match the specific acoustic performance or mechanical dimensions required.