CMC-9745-L100

Overview

The CMC-9745-L100 is an analog electret condenser microphone manufactured by Same Sky. It features a unidirectional polar pattern and wire lead termination. The device operates within a supply voltage range of 1.5 V to 9 V and draws a typical current of 400 µA. Its frequency response spans from 100 Hz to 12 kHz with an impedance of 2 kOhms. Sensitivity is rated at -37dB ±3dB @ 94dB SPL. The physical dimensions are 9.7 mm in diameter and 4.5 mm in height.

Feature Summary

• Unidirectional acoustic design for focused sound capture
• Wire lead termination style for flexible integration
• IP67 rated enclosure providing dust and water resistance

Applications

• Waterproof audio recording devices
• Industrial voice control systems
• Outdoor communication equipment

Procurement Notes

Verify the specific suffix L100 to confirm wire lead configuration and unidirectional characteristics, as other suffixes in the CMC-9745 series may offer omnidirectional patterns or PCB mount options. Ensure supply voltage requirements align with the 1.5 V to 9 V operational range specified in the datasheet before finalizing procurement.

Selection Notes

Select this component when a ruggedized, waterproof microphone with wire leads is required for unidirectional pickup. Compare sensitivity and frequency response against application needs, noting the 100 Hz to 12 kHz range. Verify that the 2 kOhm impedance matches the input stage of the connected preamplifier circuit.

Part Context

This model belongs to the CMC-9745 family of compact electret condenser microphones designed for harsh environments. The series includes various configurations such as omnidirectional PCB mounts and different terminal styles. The CMC-9745-L100 specifically addresses applications requiring durable, wire-connected sensors with IP67 protection ratings.

Replacement Considerations

Direct substitutes include other IP67-rated electret microphones with similar dimensions (9.7mm diameter) and unidirectional patterns. Verify pinout compatibility if replacing with PCB-mounted variants, as wire lead connections differ physically from surface-mount pads.