LM331A-S5TR

Overview

The LM331A-S5TR is a single-channel voltage comparator manufactured by 3PEAK in an SOT23-5 package. It operates on a wide supply range of +2.5 V to +36 V (single) or ±1.25 V to ±18 V (dual). Key electrical parameters include a maximum input offset voltage of ±6.0 mV, a maximum input bias current of 1 nA at 25°C, and a quiescent current of 150 μA per channel. The device features an open-collector output with low saturation voltage and supports an operating temperature range from −40°C to 125°C.

Feature Summary

• Wide single or dual supply voltage operation capability
• Low power consumption with supply current independent of voltage
• Input common-mode voltage range includes ground potential
• Direct interface compatibility with TTL and CMOS logic families

Applications

• High-speed line or digital line receivers
• Peak and zero-crossing detectors
• Threshold detectors and discriminators
• Sensing at ground or supply lines

Procurement Notes

Verify the specific ordering suffix matches the required pin configuration variant, as the LM331A series includes distinct pinouts for standard and alternative configurations within the same package type. Confirm that the tape and reel quantity aligns with production requirements. Ensure the selected component meets the necessary ESD protection standards for the intended manufacturing environment.

Selection Notes

Select this component when battery operation is critical due to its low supply current drain. It is suitable for designs requiring direct interfacing with digital logic without additional level shifting. Consider the open-drain output requirement for pull-up resistor implementation. Verify that the application does not exceed the absolute maximum ratings for input currents or short-circuit durations.

Part Context

This part belongs to the LM331A/LM393A/LM339A family of 36-V low-power comparators. The series provides single, dual, and quad independent comparators on a monolithic substrate. The LM331A specifically denotes the single-channel version, offering space-efficient solutions for portable consumer products and industrial sensing applications requiring high reliability.

Replacement Considerations

Public documentation confirms direct replacement compatibility with TS391 and TL331 series products.