LM393AP

Overview

The LM393AP is a dual differential voltage comparator manufactured by Texas Instruments, housed in an 8-pin PDIP through-hole package. It operates on a single supply from 2V to 36V or split supplies of ±1V to ±18V. Key electrical parameters include a maximum input offset voltage of 2mV, input bias current of 250nA, and output current capability of 20mA. The device features a propagation delay of 1.3µs and operates within a commercial temperature range of 0°C to +70°C.

Feature Summary

• Dual independent precision comparators designed for single power supply operation
• Open-collector outputs compatible with TTL, CMOS, and MOS logic systems
• Input common-mode voltage range includes ground potential

Applications

• Limit comparators and simple analog-to-digital converters
• Pulse, squarewave, and time delay generators
• High voltage digital logic gates and MOS clock timers

Procurement Notes

Verify the specific 'A' suffix designation against the manufacturer's datasheet to confirm the guaranteed maximum input offset voltage of 2mV, as standard versions may differ. Ensure the procurement order specifies the PDIP-8 through-hole package variant rather than surface-mount alternatives like DR or NSWR. Confirm RoHS compliance status and check for any recent product change notices regarding lead finish or manufacturing site updates before finalizing orders.

Selection Notes

Select this component when low power drain is required alongside compatibility with standard logic families. The open-collector output necessitates an external pull-up resistor for high-level signaling. Verify that the application voltage does not exceed the 36V maximum rating and that the operating environment remains within the 0°C to +70°C commercial temperature range specified for this package.

Part Context

This part belongs to the LMx93 family of dual differential comparators, which also includes industrial variants like the LM2903 and military-grade LM193. While functionally similar to the LM311, the LM393 series offers lower power consumption and direct interface capabilities with various logic types without requiring additional level-shifting circuitry in many configurations.

Replacement Considerations

The LM2903 serves as a direct functional substitute with an extended industrial temperature range. The LM393B provides improved ESD protection and lower propagation delay. Standard LM393 units are interchangeable if the stricter 2mV offset voltage requirement is not critical.