EM-27786-C56

Microphones Overview

The Knowles EM-27786-C56 is a subminiature electret condenser microphone designed for high-performance audio capture. It features an omnidirectional polar pattern and operates with a rated voltage of 1.3 V. The device exhibits a sensitivity of -52dB ±1dB at 74dB SPL and has an impedance of 4.4 kOhms. Its frequency range spans from 100 Hz to 4.8 kHz. The physical dimensions include a maximum height of 0.090 inches (2.28 mm) and a square shape, making it suitable for space-constrained applications.

Microphones Feature Summary

• Omnidirectional acoustic orientation for uniform sound pickup
• Subminiature form factor optimized for compact designs
• Analog output signal processing capability

Microphones Applications

• High-performance audio capture in space-constrained environments
• Rugged environment audio recording
• Compact consumer electronic devices requiring miniaturized microphones

Microphones Procurement Notes

Verify the specific datasheet version and manufacturing origin when sourcing this component. Confirm that the electrical specifications, particularly sensitivity and impedance, align with your circuit design requirements. Ensure the package dimensions match your PCB footprint constraints. Check for RoHS compliance status if required by your assembly standards. Validate availability through authorized distributors to ensure component authenticity.

Microphones Selection Notes

Select this microphone when a small footprint and omnidirectional response are critical. Consider its limited upper frequency cutoff of 4.8 kHz against wider-bandwidth alternatives if high-frequency fidelity is needed. The 1.3 V operating voltage must be compatible with your biasing network. Evaluate the -52dB sensitivity against ambient noise levels in your target application to ensure adequate signal-to-noise ratio.

Microphones Part Context

This component belongs to Knowles' line of subminiature electret condenser microphones. These devices are engineered for integration into portable electronics where size is a primary constraint. The EM series typically offers reliable analog performance in a ruggedized package suitable for various consumer and industrial audio applications.

Microphones Replacement Considerations

Direct substitutes should maintain the same omnidirectional pattern, similar sensitivity around -52dB, and comparable physical dimensions. Verify that any replacement supports the 1.3 V operating voltage and 4.4 kOhm impedance. Ensure the new part meets the same frequency response requirements up to 4.8 kHz.