TOM-1545L

Overview

The TOM-1545L is an omnidirectional electret condenser microphone manufactured by PUI Audio, Inc. It operates within a supply voltage range of 2 V to 10 V and draws a typical current of 500 µA. The device features a circular shape with dimensions of 4.00 mm in diameter and a maximum height of 1.70 mm. Electrical characteristics include an impedance of 2.2 kOhms and a sensitivity of -45 dB ±3 dB. The frequency response spans from 100 Hz to 10 kHz, providing analog output suitable for various audio sensing applications.

Feature Summary

• Omnidirectional acoustic pickup pattern for uniform sound capture
• Electret condenser transducer technology
• Flexible power supply compatibility across 2 V to 10 V ranges
• Compact circular form factor with wire lead termination

Applications

• General purpose audio recording devices
• Voice recognition systems
• Consumer electronic audio input modules
• Embedded sound sensing circuits

Procurement Notes

Verify the specific suffix variant (e.g., LW100) against project requirements, as lead lengths or packaging may differ. Confirm that the 2.2 kOhm impedance aligns with the preamplifier input stage design. Ensure the operating voltage range matches the target system's power rails to maintain optimal signal-to-noise ratio and linearity.

Selection Notes

Select this component when an omnidirectional response is required for ambient sound capture. The wide supply voltage range allows integration into both low-voltage portable devices and higher-voltage industrial systems. Consider the 4 mm diameter constraint for enclosure design. The analog output requires appropriate biasing circuitry compatible with the specified 500 µA current draw.

Part Context

This part belongs to PUI Audio's line of miniature electret microphones designed for cost-effective audio solutions. The TOM series typically offers standardized dimensions to facilitate PCB layout flexibility. The model represents a basic omnidirectional element often used in mass-produced consumer electronics where size and power consumption are critical design factors.

Replacement Considerations

The TOM-1545L-R is a direct variant with identical electrical specifications but potentially different lead configurations. Cross-reference datasheets to ensure mechanical fit and terminal type compatibility before substitution.