EM-31144-P58

Microphones Overview

The Knowles EM-31144-P58 is an omnidirectional electret condenser microphone designed for surface-mount applications. It features a sensitivity of -68.5 dBA and an impedance of 4.4 kOhms. The component operates within a frequency range of 100Hz to 10kHz and draws a supply current of 50µA. Its physical dimensions are 5.56mm x 3.99mm in length and width, with a depth of approximately 2.21mm to 2.28mm. The device utilizes SMD/SMT termination styles for PCB integration.

Microphones Feature Summary

• Omnidirectional acoustic pickup pattern for uniform sound capture from all directions
• Electret condenser technology providing analog output signals
• Surface-mount design compatible with automated PCB assembly processes

Microphones Applications

• Consumer electronic devices requiring compact audio input solutions
• Voice recognition systems utilizing analog microphone interfaces
• Portable communication equipment needing low-power audio sensors

Microphones Procurement Notes

Verify the specific suffix P58 against official Knowles documentation to confirm exact mechanical tolerances and termination specifications. Ensure compatibility with your PCB footprint design regarding the 5.56mm x 3.99mm dimensions. Confirm RoHS compliance status through the manufacturer's latest datasheet before finalizing procurement orders.

Microphones Selection Notes

Select this component when an omnidirectional response is required for general voice capture rather than directional noise rejection. Consider the -68.5 dBA sensitivity level relative to your amplifier's input requirements. The 4.4 kOhm impedance must match your circuit's biasing network. Verify that the SMD package fits within your available board space constraints.

Microphones Part Context

This model belongs to the Knowles EM series of microphones, which are widely used in portable electronics. The EM series typically offers various form factors and acoustic characteristics to suit different audio sensing needs. This specific part represents a standard omnidirectional option within that lineup.

Microphones Replacement Considerations

Consult official substitution guides for direct equivalents. Cross-reference electrical parameters such as sensitivity and impedance carefully. Mechanical fitment must be verified if replacing with similar-sized components from other manufacturers.