Texas Instruments LMV7275MFX

Overview

LMV7275MFX from Texas Instruments is a single-channel, rail-to-rail input, open-drain output comparator optimized for ultra-low-power operation at 1.8 V supply. It delivers 880 ns propagation delay (20-mV overdrive), 9 µA supply current per channel, and −0.1 V to 1.9 V input common-mode range beyond rails - enabling precise voltage monitoring in battery-powered wearables and portable electronics.

For engineers reviewing the LMV7275MFX datasheet, LMV7275MFX pinout, LMV7275MFX application, or LMV7275MFX equivalent, key selection criteria include its open-drain output enabling wired-OR logic and level-shifting up to 5.5 V, guaranteed 4 mV input offset voltage, and validated operation from −40°C to +85°C across 1.8–5.5 V supply.

Technical Context

The LMV7275MFX uses paralleled PNP/NPN bipolar input pairs to achieve rail-to-rail input operation down to −0.1 V below V− and up to 0.1 V above V+, with crossover near 950 mV from V+. Its open-drain NMOS output stage eliminates internal pull-up, allowing external pull-up to any voltage ≤5.5 V independent of V+.

This architecture supports level translation between disparate supply domains and wired-OR bus configurations. Unlike the push-pull LMV7271/LMV7272, the LMV7275MFX requires an external pull-up resistor and exhibits load-dependent rising-edge propagation delay, while maintaining consistent 9 µA quiescent current across 1.8–5.5 V.

Key Specifications

Pinout & Package

LMV7275MFX is housed in a 5-pin SOT-23 (DBV) package measuring 1.60 mm × 2.90 mm, optimized for space-constrained PCB layouts in portable devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV7211IDBVR and MAX9021AXK+T, the LMV7275MFX uniquely balances sub-1-µs speed, open-drain flexibility, and <10-µA power - making it the only option supporting both fast battery monitoring and 3.3 V/5 V logic interfacing from a 1.8 V rail.

Availability

LMV7275MFX is available at Aetrix Electronics and suitable for wearable devices, smartphone battery protection circuits, and wireless sensor nodes requiring stable component supply with guaranteed long-term manufacturability.

Supply support for LMV7275MFX 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 conditioning and low-power design.

The LMV727x family was engineered specifically for space- and energy-constrained applications demanding rail-to-rail input operation and nanoampere-level quiescent current - targeting next-generation portable and battery-operated electronics.

FAQ

What is the maximum allowable pull-up voltage for the LMV7275MFX open-drain output?

The LMV7275MFX open-drain output supports external pull-up voltages up to 5.5 V, regardless of its own V+ supply voltage. This enables level-shifting applications - for example, using LMV7275MFX with a 1.8 V supply to drive a 3.3 V interrupt line. Ensure the pull-up resistor value limits sink current within the 15 mA absolute maximum rating under worst-case conditions.

Does the LMV7275MFX require a bypass capacitor on V+?

Yes, LMV7275MFX requires a minimum 0.1 µF ceramic bypass capacitor placed as close as possible to the V+ pin. This mitigates supply glitches caused by transient shoot-through current during output transitions, which could otherwise couple noise into adjacent analog circuitry or destabilize reference voltages.

Can the LMV7275MFX operate with a single 1.8 V supply and ground reference?

Yes, LMV7275MFX is fully specified for single-supply operation from 1.8 V to 5.5 V with GND as V−. Its input common-mode range extends to −0.1 V, allowing valid operation even when input signals dip slightly below ground - a key advantage for precision sensor interfaces in single-supply systems.

What is the guaranteed input offset voltage specification for LMV7275MFX over temperature?

The LMV7275MFX guarantees a maximum input offset voltage of 6 mV across the full operating temperature range of −40°C to +85°C, with typical value of 4 mV at 25°C. This ensures robust threshold accuracy in battery voltage monitoring and UVLO circuits without requiring calibration.

How does the LMV7275MFX differ from the LMV7271 in terms of output architecture and use cases?

The LMV7275MFX features an open-drain output requiring an external pull-up, while the LMV7271 uses a push-pull output. This makes LMV7275MFX ideal for wired-OR bus configurations and level-shifting applications, whereas LMV7271 is better suited for direct CMOS loading without external components. Both share identical input stage and quiescent current.