CMEJ-4618-42-L008

Overview

The CMEJ-4618-42-L008 is an omnidirectional electret condenser microphone manufactured by Same Sky. It features a round shape with dimensions of 4.6 x 4.6 x 1.8 mm and includes an 8 mm wire length termination with a rubber boot. The device operates at 2 Vdc with a current consumption of 500 µA. Key electrical parameters include a sensitivity of -42 dB (±3 dB tolerance), an output impedance of 2200 Ω, and an operating frequency range of 100 Hz to 10,000 Hz. The signal-to-noise ratio is specified at 60 dBA.

Feature Summary

• Omnidirectional acoustic design for uniform sound capture from all directions
• Integrated rubber boot on wire leads for strain relief and environmental protection
• Low power consumption suitable for battery-operated portable devices

Applications

• Portable consumer electronics audio input
• Voice recognition systems
• General purpose sound detection modules

Procurement Notes

Verify the specific suffix L008 against official Same Sky documentation to confirm the 8 mm wire length specification. Ensure compatibility with existing circuit designs regarding the 2 Vdc operating voltage and 500 µA current draw. Confirm RoHS compliance status through the manufacturer's latest product notifications before finalizing procurement orders.

Selection Notes

Select this component when a compact omnidirectional microphone with pre-terminated wires is required. The 4.6 mm diameter allows for integration into space-constrained enclosures. The fixed 2 Vdc supply requirement must be accommodated by the host system's power architecture. Consider the 60 dBA signal-to-noise ratio for applications requiring moderate audio fidelity.

Part Context

This part belongs to the CMEJ-4618-42-LX series of electret condenser microphones. The series offers various wire length options while maintaining consistent acoustic and electrical performance characteristics. Same Sky provides ECAD models and datasheets to support schematic and layout integration for audio subsystems.

Replacement Considerations

Direct substitutes within the same series include CMEJ-4618-42-L015 for longer wire lengths or CMEJ-4618-42-L008 variants with different packaging. Verify pinout and sensitivity tolerances match before substitution.