CMA-6542TF-K

Overview

The CMA-6542TF-K is an omnidirectional electret condenser microphone manufactured by Same Sky. It features a round form factor with a diameter of 9.70 mm (0.382 inches) and utilizes solder pad termination for PCB mounting. The device operates within a supply voltage range of 1.5 V to 10 V, drawing a maximum supply current of 500 µA. Its frequency response spans from 100 Hz to 20 kHz, ensuring broad audio capture capabilities. The sensitivity is rated at -42 ±2 dB relative to 1 V/Pa at 94 dB SPL, providing consistent acoustic conversion. The microphone exhibits a signal-to-noise ratio of 58 dB and possesses an impedance of 1500 Ohms. These specifications define its electrical and acoustic performance envelope.

Feature Summary

• Omnidirectional polar pattern for uniform sound pickup from all directions
• Electret condenser technology for analog audio signal generation
• Top port location design for direct acoustic exposure
• Solder pad termination for secure printed circuit board integration

Applications

• Consumer electronic devices requiring compact audio input
• Voice recognition systems and smart home assistants
• Portable recording equipment and digital voice recorders
• Telecommunication handsets and speakerphone modules

Procurement Notes

Verify the manufacturer designation as Same Sky, formerly known as CUI Devices, to ensure component authenticity. Confirm that the specific suffix 'K' corresponds to the standard packaging and tolerance requirements. Cross-reference the datasheet parameters against your system's power budget, specifically the 500 µA supply current limit. Ensure the 9.70 mm diameter fits within the designated mechanical footprint on the target PCB layout.

Selection Notes

Select this component when an omnidirectional pickup pattern is required for general ambient sound capture rather than directional isolation. The wide operating voltage range of 1.5 V to 10 V allows flexibility in power supply design across various battery-operated and mains-powered applications. Consider the 58 dB SNR for environments with moderate background noise levels where high-fidelity studio quality is not the primary constraint.

Part Context

This model belongs to the Same Sky line of electret condenser microphones designed for surface-mount integration. The series emphasizes compact dimensions suitable for space-constrained portable electronics. The CMA-6542TF-K represents a standard configuration within this family, balancing cost-effectiveness with reliable acoustic performance for mass-produced consumer hardware.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify mechanical compatibility and electrical pinout alignment before considering alternative manufacturers or different models within the Same Sky portfolio.