CMEJ-0415-42-P

Overview

The CMEJ-0415-42-P is an omnidirectional electret condenser microphone manufactured by Same Sky. It features a compact cylindrical design with a diameter of 4.0 mm and a depth of 1.5 mm, suitable for PCB mounting via solder pins. The device operates at a DC supply voltage of 2.0 Vdc with a current rating of 500 uA. It exhibits a sensitivity of -42 dB (±3 dB) referenced to 94 dB SPL at 1 kHz, and presents an impedance of 2.2 kOhms. The frequency response spans from 100 Hz to 10 kHz.

Feature Summary

• Omnidirectional acoustic pickup pattern ensures uniform sound capture from all directions.
• Electret condenser technology provides reliable analog audio signal conversion.
• Compact surface-mount compatible form factor facilitates integration into space-constrained designs.

Applications

• Consumer electronic audio input devices
• Portable communication equipment
• Voice recognition systems

Procurement Notes

Verify the specific suffix and manufacturer designation upon ordering, as component sourcing may involve legacy branding transitions. Confirm that the solder pin termination type aligns with the target printed circuit board layout requirements. Ensure the operating voltage parameters match the system power supply specifications to maintain optimal performance and longevity of the acoustic transducer.

Selection Notes

Select this component when a low-profile, omnidirectional microphone is required for general voice capture applications. The 2.0 Vdc operating voltage suits battery-powered portable devices. Consider the 4.0 mm diameter constraint against available board real estate. Verify that the -42 dB sensitivity meets the signal-to-noise ratio requirements of the downstream amplifier circuitry.

Part Context

This part belongs to the Same Sky CMEJ series of electret condenser microphones. The series offers various sizes and sensitivities to accommodate different acoustic environments. The CMEJ-0415-42-P represents the smaller 4.0 mm diameter variant within this product line, designed for applications where minimal physical footprint is critical.

Replacement Considerations

Direct substitutes include other 4.0 mm omnidirectional electret microphones with similar -42 dB sensitivity and 2.0 Vdc operation. Verify mechanical dimensions and pinout compatibility before substitution. Cross-reference with CUI Devices legacy part numbers if applicable.