CMM-2718AT-42316-TR

Overview

The CMM-2718AT-42316-TR is an analog MEMS microphone from Same Sky, designed for omnidirectional sound capture. It operates within a voltage range of 1.6 V to 3.6 V and draws a supply current of 160 µA. The device features a sensitivity of -42 dB with a tolerance of ±3 dB at 94 dB SPL, providing a signal-to-noise ratio of 57 dB. Its frequency response spans from 100 Hz to 10 kHz. The component utilizes a top-port configuration and is housed in a compact rectangular package measuring 2.75 mm in length, 1.85 mm in width, and 0.95 mm in maximum height.

Feature Summary

• Omnidirectional acoustic porting for uniform sound pickup from all directions
• Analog output interface compatible with standard audio processing circuits
• Low power consumption suitable for battery-operated portable devices
• Surface-mount technology (SMT) design for automated PCB assembly

Applications

• Voice recognition systems requiring consistent directional sensitivity
• Portable consumer electronics such as smartphones and tablets
• Wearable audio devices with strict space and power constraints
• Smart home voice assistants and IoT audio sensors

Procurement Notes

Verify the specific suffix TR indicates tape-and-reel packaging when ordering. Confirm that the operating voltage requirements align with the system's power rail, as the device supports a range from 1.6 V to 3.6 V. Ensure the PCB footprint matches the specified dimensions of 2.75 mm by 1.85 mm. Check for RoHS compliance documentation if environmental regulations apply to the final product assembly.

Selection Notes

Select this component when a low-profile, omnidirectional analog microphone is required for compact designs. The 160 µA current draw makes it suitable for energy-efficient applications compared to higher-current alternatives. The 57 dB SNR provides adequate performance for general voice capture tasks. Consider the top-port orientation to ensure proper acoustic path alignment on the printed circuit board during mechanical integration.

Part Context

This part belongs to the Same Sky CMM series of MEMS microphones, which offers various sizes and electrical characteristics. The CMM-2718AT variant specifically denotes the 2.75 mm x 1.85 mm form factor with top-port acoustics. It is manufactured by Same Sky, formerly known as CUI Devices, maintaining continuity in the product lineage for existing designs.

Replacement Considerations

Direct substitutes include other Same Sky CMM series parts with identical dimensions and electrical specs, such as CMM-2718AB-38316-TR, noting differences in sensitivity and port direction. Cross-manufacturer replacements require careful verification of pinout compatibility, sensitivity levels, and package dimensions to ensure seamless integration without redesigning the acoustic chamber or PCB layout.