CMI-5247TF-K

Overview

The CMI-5247TF-K is an analog electret condenser microphone manufactured by Same Sky. It features a unidirectional polar pattern and operates within a frequency range of 70 Hz to 20 kHz. The device requires a supply voltage between 1.5 V and 10 V and draws a current of 400 µA. Its sensitivity is rated at -47 dB ±3 dB relative to 1 V/Pa at 94 dB SPL. The component utilizes solder pads for termination and is designed for through-hole or surface-mount integration depending on the specific variant configuration.

Feature Summary

• Unidirectional acoustic design for focused sound capture
• Wide operating voltage range supporting various logic levels
• Standard analog output interface for direct signal processing

Applications

• Voice recognition systems
• Consumer audio recording devices
• Industrial voice control interfaces

Procurement Notes

Verify the exact termination style (solder pins vs. pads) against the specific datasheet revision, as variations exist within the CMI series. Confirm RoHS compliance status with the supplier prior to ordering. Ensure the selected variant matches the required PCB footprint dimensions to avoid assembly errors during manufacturing.

Selection Notes

Select this component when a low-cost, high-sensitivity analog microphone is required for voice-band applications. Compare impedance and sensitivity specifications against other unidirectional models in the Same Sky portfolio if space constraints differ. Ensure the host circuit can accommodate the 400 µA bias current requirement without excessive power consumption.

Part Context

This part belongs to the Same Sky CMI series of electret condenser microphones. These components are widely used in consumer electronics due to their reliability and consistent performance. The series offers various directional patterns and package sizes to suit different enclosure designs and acoustic requirements.

Replacement Considerations

Check for pin-compatible alternatives such as the CMI-4537-SN69 if similar electrical characteristics are needed but different packaging is preferred. Verify that substitute parts maintain the same sensitivity and frequency response curves to ensure acoustic performance consistency.