3SM222KMT1KA-P

Overview

The 3SM222KMT1KA-P is a digital MEMS microphone manufactured by 3S (Solid State System). It utilizes Pulse Density Modulation (PDM) output and features an omnidirectional acoustic port located on the top surface. The device operates within a voltage range of 1.6 V to 3.6 V. Key electrical specifications include a Signal-to-Noise Ratio (SNR) of 64 dB, a dynamic range of 120 dB, and a sensitivity of -26 ±1 dBFS at 94 dB SPL. The frequency response spans from 100 Hz to 10 kHz. The component is housed in a rectangular surface-mount package with dimensions of 4.00 mm x 3.00 mm x 1.00 mm.

Feature Summary

• Digital PDM interface for direct connection to audio processors
• Omnidirectional sound pickup via top-port design
• High signal-to-noise ratio and wide dynamic range performance
• Compact surface-mount form factor suitable for space-constrained applications

Applications

• Smartphones and mobile communication devices
• Voice recognition systems
• Consumer electronics audio input modules

Procurement Notes

Verify the specific suffix and revision code against the manufacturer's latest datasheet to ensure compatibility with your design requirements. Confirm that the top-port orientation aligns with your acoustic enclosure design. Check for ESD handling precautions during assembly, as MEMS devices are sensitive to electrostatic discharge. Ensure the supply voltage matches the specified 1.6 V to 3.6 V range for proper operation.

Selection Notes

Select this component when a digital PDM output is required instead of analog. Consider the 64 dB SNR and 120 dB dynamic range for high-fidelity voice capture needs. The top-port configuration is critical if the PCB layout restricts side-access or requires a specific acoustic path. Compare the 4.00 mm x 3.00 mm footprint against available board space. Evaluate the 100 Hz to 10 kHz bandwidth against the target audio frequency requirements.

Part Context

3S (Solid State System), founded in 1998, specializes in NAND flash and IC solutions. This microphone belongs to their digital MEMS product line, designed for mobile and consumer electronics. The company emphasizes reliability and performance in compact audio sensing components. The 3SM222 series represents their standard offering for digital audio input applications requiring small form factors.

Replacement Considerations

The 3SM221NMT1KA is a documented variant within the same product family. Verify pinout and dimensional compatibility before substitution. Ensure the replacement part meets the same PDM interface and voltage requirements.

FAQ

What is the acoustic port location for the 3SM222KMT1KA-P?

The acoustic port is located on the top surface of the package.

What is the operating voltage range for this microphone?

The device operates within a voltage range of 1.6 V to 3.6 V.

What type of output does this component provide?

It provides a digital Pulse Density Modulation (PDM) output.