BT-21834-000

Overview

The Knowles BT-21834-000 is an omnidirectional electret condenser microphone designed for analog audio signal output. It operates within a frequency range of 100 Hz to 10 kHz and features a sensitivity of -57dB ±3dB. The component has an impedance of 3.5 kOhms and requires a current rating of 50 uA. It utilizes solder pads for termination and has a maximum height of 0.090 inches (2.29mm). This device is RoHS compliant.

Feature Summary

• Omnidirectional acoustic design for uniform sound capture
• Electret condenser transducer technology
• Analog output interface

Applications

• General purpose voice recording
• Consumer electronic audio input devices
• Telecommunication equipment microphones

Procurement Notes

Verify the part status as obsolete before procurement planning. Confirm RoHS compliance requirements with the specific project standards. Ensure compatibility with existing PCB footprints due to the solder pad termination type. Check for alternative sources if original manufacturing availability is limited.

Selection Notes

Select this component when an omnidirectional response is required for general audio pickup. The -57dB sensitivity suits applications not requiring high-gain pre-amplification. Verify that the 3.5 kOhm impedance matches the input stage of the connected circuitry. Consider the physical height constraint of 2.29mm for enclosure integration.

Part Context

This model belongs to the Knowles microphone family, specifically utilizing electret condenser technology. It represents a standard analog solution for voice band applications. The BT series typically denotes specific form factors or mounting styles within the manufacturer's portfolio.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the obsolete status, direct cross-referencing requires consulting official replacement guides or engineering change notices from Knowles.