LMC7221AIM

Overview

The LMC7221AIM is a single-channel, tiny CMOS analog comparator manufactured by Texas Instruments. It features rail-to-rail input capability and an open-drain output configuration. The device operates within a supply voltage range of 2.7 V to 15 V. Key electrical specifications include a typical response time of 4 µs, a maximum quiescent current of 14 µA, and an input bias current of 0.4 pA. The unit supports a push-pull equivalent drive capability through the open-drain structure when paired with external pull-up components.

Feature Summary

• Rail-to-rail input stage allows signal detection across the full supply voltage range.
• Open-drain output provides flexible interfacing with various logic families via external pull-up selection.
• Ultra-low power consumption suitable for battery-operated applications.

Applications

• Battery-powered monitoring systems
• Threshold detection circuits
• Over-voltage protection

Procurement Notes

Verify the specific suffix requirements for the LMC7221AIM family, as packaging and temperature grades vary. Confirm availability status directly with authorized distributors, as lead times may fluctuate. Ensure the selected variant matches the required operating temperature range and package type for your design constraints.

Selection Notes

Select this component when rail-to-rail input sensing is required in a compact SOT-23-5 package. Choose the open-drain output version if system-level pull-up voltage flexibility is needed. Compare against the LMC7211 series if a fixed push-pull output is preferred without external components.

Part Context

This part belongs to the LMC72xx series of tiny CMOS comparators from Texas Instruments. It shares architectural similarities with the LMC7211 but differs in output topology. The series is designed for low-power, space-constrained applications requiring high input impedance and wide common-mode voltage ranges.

Replacement Considerations

The LMC7221AIMX/NOPB is a verified pin-compatible and functionally equivalent replacement variant offered by Texas Instruments. Verify that the open-drain output specification remains acceptable for the target application before substitution.