LM111XH

Overview

The LM111XH is a high-speed voltage comparator manufactured by Texas Instruments, part of the LM111 series. It features a single channel with an open collector output and differential input type. The device operates within a supply voltage range of 5 V to 36 V, drawing a typical operating current of 6 mA. Key electrical parameters include a response time of 200 ns, an input offset voltage (Vos) of 3 mV, and an input bias current (Ib) of 100 nA. It supports a maximum output current of 50 mA per channel and has a power dissipation rating of 500 mW. The component is housed in a TO-99-8 package for through-hole mounting and functions across a temperature range of -55°C to +125°C.

Feature Summary

• High-speed general-purpose voltage comparison with 200 ns response time
• Wide single-supply operation capability from 5 V to 36 V
• Open collector output configuration supporting up to 50 mA load current
• Low input offset voltage of 3 mV for precise threshold detection

Applications

• Over-voltage protection circuits
• Window detector systems
• Zero-crossing detection
• Logic level translation interfaces

Procurement Notes

Verify that the specific suffix 'XH' corresponds to the intended package and temperature grade, as datasheets typically list standard variants like 'H' or 'N'. Confirm RoHS compliance status if required, noting that some legacy TO-99 packages may have different environmental declarations. Ensure the supplier provides the official Texas Instruments datasheet for the exact suffix to validate pinout and electrical limits before integration.

Selection Notes

Select this component when a fast, low-power comparator with a wide supply voltage range is required. The open-collector output allows flexibility in interfacing with various logic families. Consider the TO-99 package size constraints and thermal dissipation capabilities. Verify that the 3 mV offset voltage meets the precision requirements of the specific application circuit.

Part Context

The LM111XH belongs to the LM111 family of analog comparators produced by Texas Instruments. This series is widely recognized for its robust performance in industrial and commercial applications. The device serves as a direct replacement for older National Semiconductor LM111 parts, maintaining compatibility while offering modern manufacturing standards. It is categorized under amplifier ICs and general-purpose analog comparators.

Replacement Considerations

The LM111H/NOPB is a verified equivalent part number within the same family, offering identical electrical specifications and functionality. Other compatible alternatives include the LM111H and LM111JAN, depending on the required package style and military-grade specifications.