LM339ADT

Overview

The LM339ADT is a quad analog comparator manufactured by STMicroelectronics, housed in a 14-SOIC surface-mount package. It operates on a single or dual supply voltage ranging from 2 V to 32 V. The device features four independent differential comparators with an open-collector output type compatible with CMOS, DTL, ECL, MOS, and TTL logic families. Key electrical specifications include a maximum input offset voltage of 2 mV at 30 V, a typical input bias current of 100 nA, and a propagation delay of 1.3 µs. The quiescent supply current is typically 2 mA, with each channel capable of sourcing up to 4 mA. It functions within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Integrates four independent high-gain differential comparators for multi-channel signal processing.
• Features an open-collector output stage ensuring compatibility with various digital logic families including CMOS and TTL.
• Supports wide single-supply operation from 2 V to 32 V, facilitating use in diverse power environments.

Applications

• General-purpose voltage level detection circuits
• Over-voltage and under-voltage protection systems
• Analog-to-digital converter interface stages

Procurement Notes

Verify the specific suffix 'DT' confirms the SOIC-14 tape-and-reel packaging configuration. Ensure the component meets RoHS3 compliance requirements if mandated by your assembly standards. Cross-reference the manufacturer part number with authorized distributor catalogs to confirm authenticity and traceability before procurement.

Selection Notes

Select this component when multiple independent comparison channels are required in a compact surface-mount footprint. It is suitable for designs needing wide supply voltage flexibility and standard logic output compatibility. Consider thermal dissipation limits and ensure the application stays within the specified 0°C to +70°C operating temperature range.

Part Context

This part belongs to the LM339 family of low-power quad comparators. It shares functional similarities with other variants like the LM339P (DIP) or LM339DR (SOIC), differing primarily in packaging and reel specifications. The 'A' grade indicates tighter input offset voltage tolerances compared to standard grades.

Replacement Considerations

Direct pin-compatible substitutes include the LM339DR and LM339DT from STMicroelectronics. Other manufacturers offer equivalents such as the MC3393 or LM339N, though verification of electrical parameters and package dimensions is required.