CMEJ-4618-42-L015

Overview

The Same Sky CMEJ-4618-42-L015 is an omnidirectional electret condenser microphone designed for audio signal capture. It features a compact cylindrical form factor with a diameter of 4.6 mm and a depth of 1.8 mm. The device operates at a supply voltage of 2 VDC and draws a current of 500 uA. It provides a sensitivity of -42 dB and presents an impedance of 2.2 kOhms. Electrical connection is established via wire leads, which have a specified length of 15 mm.

Feature Summary

• Omnidirectional acoustic response for uniform sound pickup from all directions
• Electret condenser transducer technology for reliable audio conversion
• Low power consumption suitable for battery-operated portable devices
• Wire lead termination for flexible integration into various circuit layouts

Applications

• Portable consumer electronics requiring compact audio input
• Voice recognition systems in small form-factor devices
• General-purpose sound detection modules
• Intercom and communication equipment

Procurement Notes

Verify the specific part number against official manufacturer documentation to ensure compatibility with design requirements. Confirm that the wire lead length and package type meet assembly specifications. Check for RoHS compliance status as indicated in the latest datasheet. Ensure the operating voltage and current ratings align with the target system's power budget before finalizing procurement.

Selection Notes

Select this component when an omnidirectional microphone with wire leads is required instead of surface-mount options. The 4.6 mm diameter allows for integration into tight spaces where larger microphones cannot fit. Consider the 2 VDC operating voltage to ensure compatibility with low-voltage logic interfaces. The -42 dB sensitivity offers a balanced output level for standard audio processing circuits without excessive amplification needs.

Part Context

This microphone belongs to the CMEJ series of electret condenser microphones manufactured by Same Sky. The series includes various sizes and mounting configurations, such as PCB mount and surface-mount variants. This specific model distinguishes itself through its wire lead termination, offering flexibility for applications where direct soldering to a board is not preferred or possible.

Replacement Considerations

Direct substitutes within the same series include models like CMEJ-0627-42-P or CMEJ-0413-42-SMT-TR, though these feature different mounting styles (PCB pin or SMD) and dimensions. Verify that any replacement maintains the required 2 VDC operation, 2.2 kOhm impedance, and -42 dB sensitivity to ensure functional equivalence in the existing circuit design.