Texas Instruments LMC7221AIM5X/NOPB

Overview

LMC7221AIM5X/NOPB from Texas Instruments is a micropower CMOS single comparator in 5-pin SOT-23 package, featuring rail-to-rail input, open-drain output, 7 μA typical supply current at 5V, 4 μs propagation delay (tPHL/tPLH) at 5V with 100 mV overdrive, and operation across 2.7V–15V supply range. It serves as a precision voltage threshold detector in battery-powered sensor interfaces and mixed-voltage level-shifting circuits.

For engineers reviewing the LMC7221AIM5X/NOPB datasheet, LMC7221AIM5X/NOPB pinout, LMC7221AIM5X/NOPB application, or LMC7221AIM5X/NOPB equivalent, key selection criteria include its ultra-low quiescent current, guaranteed rail-to-rail input beyond V−/V+, open-drain flexibility for multi-supply logic interfacing, and −40°C to +85°C industrial temperature rating.

Technical Context

The LMC7221AIM5X/NOPB implements a CMOS input stage with p-channel and n-channel differential pairs enabling rail-to-rail common-mode input range extending 0.3 V beyond both supply rails. Its open-drain NMOS output stage allows external pull-up to voltages up to 15 V-enabling direct interface between 2.7V/5V comparator domains and 3.3V/5V/15V logic or LED drivers.

It delivers 75 dB minimum CMRR and 80 dB PSRR across 2.7V–15V supplies, with input offset voltage specified at 5 mV (max) for the AI grade and 15 mV (max) for BI grade. The device achieves 4 μs propagation delay at 2.7V and 5V supplies with 100 mV overdrive, supporting reliable timing-critical detection in low-power systems.

Key Specifications

Pinout & Package

LMC7221AIM5X/NOPB uses the 5-pin SOT-23 (DBV) package, measuring 3.05 mm × 2.75 mm × 1.45 mm max height, RoHS-compliant with Sn (matte tin) lead finish and MSL Level-1 rating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar comparator applications.

Compared with LMC7221AIM5/NOPB, the X suffix variant offers identical performance with optimized logistics for volume production; compared with TLV3701IDBVR, LMC7221AIM5X/NOPB trades higher quiescent current for broader supply range (2.7–15 V), rail-to-rail input margin, and open-drain compatibility with legacy 12 V/15 V subsystems.

Availability

LMC7221AIM5X/NOPB is available at Aetrix Electronics and suitable for battery voltage monitoring, mixed-voltage logic interfacing, zero-crossing detection, LED indicator driving, and direct sensor interface applications requiring stable component supply across industrial and portable electronics programs.

Supply support for LMC7221AIM5X/NOPB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, longevity, and broad application support.

The LMC7221AIM5X/NOPB belongs to TI's precision analog comparator family designed specifically for space-constrained, low-power, and mixed-voltage system monitoring-targeting portable instrumentation, battery management, and industrial control front ends.

FAQ

What is the maximum supply voltage rating for LMC7221AIM5X/NOPB?

The LMC7221AIM5X/NOPB has an absolute maximum supply voltage (V+ – V−) of 16 V, with recommended operating range from 2.7 V to 15 V. Operation at 15 V is fully characterized per datasheet AC/DC specifications, including propagation delay, output sinking capability, and input common-mode range. Exceeding 16 V risks permanent damage to the internal CMOS structure.

Does LMC7221AIM5X/NOPB support true rail-to-rail input operation?

Yes, the LMC7221AIM5X/NOPB supports rail-to-rail input with guaranteed common-mode range from V− − 0.3 V to V+ + 0.3 V across all supply voltages (2.7 V, 5 V, 15 V). This allows direct sensing of signals at or slightly beyond the supply rails-critical for battery voltage monitoring and current-sense amplifier outputs without external biasing networks.

Can LMC7221AIM5X/NOPB drive an LED directly?

Yes, the LMC7221AIM5X/NOPB open-drain output can sink up to 30 mA continuously, enabling direct driving of low-current indicator LEDs. With a 5 V supply and 1 kΩ pull-up, it delivers ~4.5 mA-sufficient for high-efficiency indicators. For higher currents or 12 V/15 V LEDs, an external pull-up to the target voltage is required, leveraging the part's 15 V output voltage rating.

What is the input offset voltage specification for LMC7221AIM5X/NOPB?

The LMC7221AIM5X/NOPB is the AI-grade variant with maximum input offset voltage (VOS) of 5 mV at 25°C and 8 mV over the full −40°C to +85°C temperature range. Typical VOS is 3 mV. This grade is selected for applications requiring tighter threshold accuracy than the BI-grade (15 mV max), such as precision battery cutoff or reference-based alarm triggers.

Is LMC7221AIM5X/NOPB compatible with 3.3 V logic systems?

Yes, the LMC7221AIM5X/NOPB operates from 2.7 V to 15 V and features an open-drain output that can be pulled up to 3.3 V-making it fully compatible with 3.3 V microcontrollers and FPGAs. Its rail-to-rail input accepts signals from 0 V to 3.3 V (or beyond) when powered from 3.3 V, and propagation delay remains under 5 μs, ensuring robust timing margins in digital interface circuits.