Texas Instruments LMV331M7

Overview

LMV331M7 from Texas Instruments is a single, low-voltage, rail-to-ground input comparator with open-collector output, 60 µA typical supply current per channel, 200 ns propagation delay at 5 V, and −0.1 V to 4.2 V input common-mode range. It operates from 2.7 V to 5 V and is used in battery-powered voltage monitoring and portable power management circuits.

For engineers reviewing the LMV331M7 datasheet, LMV331M7 pinout, LMV331M7 application, or LMV331M7 equivalent, key selection criteria include its SC70-5 package footprint, ground-sensing input capability, low quiescent current for extended battery life, and compatibility with CMOS/TTL logic interfaces via external pull-up.

Technical Context

The LMV331M7 implements a bipolar-input, BiCMOS-output architecture optimized for noise immunity and fast response in low-voltage systems. Its input stage supports common-mode voltages down to −0.1 V (below ground), enabling direct sensing of signals referenced to system ground.

It features an open-collector NPN output requiring an external pull-up resistor (1 kΩ–10 kΩ) to any supply ≤ V+, supporting wired-OR logic, level translation, and interfacing with mixed-voltage digital systems without additional level-shifting circuitry.

Key Specifications

Pinout & Package

LMV331M7 is housed in a 5-pin SC70 package (2.00 mm × 1.25 mm), offering 50% smaller footprint than SOT-23 and optimized for space-constrained portable PCBs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV331M7, TLV331DBVR trades speed for lower quiescent current, while MAX9021AUT+T adds hysteresis and wider supply range at higher power cost-making LMV331M7 optimal for balanced 2.7–5 V portable designs needing both speed and efficiency.

Availability

LMV331M7 is available at Aetrix Electronics and suitable for battery voltage monitoring, power sequencing control, and overcurrent protection requiring stable component supply across consumer, industrial, and medical portable platforms.

Supply support for LMV331M7 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 specializing in analog and embedded processing technologies, with decades of expertise in precision signal chain and power management ICs.

The LMV33x-N series was designed specifically for space- and power-constrained portable electronics, delivering LM393-class functionality at dramatically lower supply current and in miniature packages like SC70.

FAQ

What is the maximum supply voltage rating for LMV331M7?

The absolute maximum supply voltage for LMV331M7 is 5.5 V, as specified in the Absolute Maximum Ratings table. Operation above 5 V risks permanent damage. The recommended operating range is 2.7 V to 5 V, ensuring guaranteed performance including input common-mode range, propagation delay, and output saturation voltage. LMV331M7 must not be operated continuously at 5.5 V.

Does LMV331M7 support rail-to-rail input?

LMV331M7 does not support full rail-to-rail input. Its input common-mode voltage range extends from −0.1 V to 4.2 V at 5 V supply - meaning it accepts signals 0.1 V below ground (true ground-sensing) but only up to 0.8 V below V+, not to V+. This allows direct interfacing with ground-referenced sensors but excludes signals near the positive rail without attenuation.

Can LMV331M7 drive a 3.3 V logic input directly?

Yes, LMV331M7 can drive a 3.3 V logic input directly using an external pull-up resistor to 3.3 V. Its open-collector output is compatible with any pull-up voltage ≤ V+, so connecting the pull-up to 3.3 V (while V+ = 5 V) is valid and commonly used for level translation. The output saturation voltage remains ≤200 mV at 4 mA sink, ensuring a solid logic LOW for 3.3 V CMOS inputs.

What is the typical input offset voltage of LMV331M7 and how does it affect accuracy?

The typical input offset voltage of LMV331M7 is 7 mV at 25°C and 5 V supply. This means the comparator may switch when the differential input is as small as ±7 mV, introducing potential error in precision threshold detection. For applications requiring <5 mV accuracy, external trimming or selection of a lower-VOS comparator (e.g., TLV331 at 2.5 mV typ) is recommended.

Is LMV331M7 available in tape-and-reel packaging for automated assembly?

Yes, LMV331M7 is offered in tape-and-reel packaging per JEDEC standard J-STD-020. The SC70-5 variant (LMV331M7) ships in 3,000-unit reels, compatible with standard SMT pick-and-place equipment. Reel dimensions and orientation comply with industry-standard carrier tape specifications, supporting high-yield automated manufacturing for portable electronics production.