LM239AMX

Overview

The LM239AMX is a quad differential comparator manufactured by Texas Instruments, packaged in a TSSOP-14 surface-mount format. It operates within a supply voltage range of 2 V to 30 V and features a typical response time of 300 ns. The device draws a working supply current of 2 mA and provides an output current of 6 mA per channel. Input characteristics include a maximum input offset voltage of 3 mV and an input bias current of 250 nA. It supports CMOS and TTL output types and functions across an extended temperature range from -55 °C to +125 °C.

Feature Summary

• Integrates four independent differential comparators within a single compact package for space-constrained designs.
• Supports wide single-supply operation ranging from 2 V to 30 V for versatile power compatibility.
• Features open-collector outputs compatible with various logic families including CMOS and TTL.

Applications

• Overvoltage and overcurrent protection circuits
• Voltage monitoring and level detection systems
• Peak hold circuits

Procurement Notes

Verify the manufacturer designation on the component marking, as the part number indicates Texas Instruments technology despite the query source. Confirm the TSSOP-14 package type and ensure the specific suffix matches the required reel or cut-tape configuration for your assembly process. Cross-reference the datasheet revision to confirm electrical parameters align with your design requirements.

Selection Notes

Select this component when a low-cost, high-density solution for multiple comparison tasks is required. The wide supply voltage range makes it suitable for battery-powered applications where voltage levels fluctuate. Consider the 300 ns propagation delay for timing-sensitive signals and verify that the open-collector output stage meets the pull-up requirements of your downstream logic interface.

Part Context

This device belongs to the LM239 family of analog comparators, known for providing four independent comparisons in a single integrated circuit. It serves as a general-purpose alternative to operational amplifiers used in comparator configurations, offering faster switching speeds and optimized output stages for digital interfacing without the need for external pull-up resistors in many standard logic applications.

Replacement Considerations

Compatible substitutes include the LM239DR (SOIC-14), LM239AD (DIP-14), and LM239AMPW (TSSOP-14). Verify pinout compatibility and electrical specifications such as input offset voltage and supply current limits before substitution to ensure circuit performance remains within acceptable tolerances.