Texas Instruments LMV339MT

Overview

LMV339MT from Texas Instruments is a quad, low-voltage, rail-to-ground input comparator with open-collector outputs, designed for space-constrained portable electronics. It operates from 2.7 V to 5 V, draws only 140–200 µA total supply current (all four channels), delivers 200 mV typical output saturation voltage at 4 mA sink, and achieves 200 ns propagation delay at 5 V with 100 mV overdrive - enabling precise, low-power threshold detection in battery-powered systems.

For engineers reviewing the LMV339MT datasheet, LMV339MT pinout, LMV339MT application, or LMV339MT equivalent, key selection considerations include its guaranteed 2.7-V/5-V performance, −40°C to +85°C industrial temperature range, ground-sensing input common-mode range (−0.1 V to 4.2 V at 5 V), open-collector output compatibility with wired-OR logic, and availability in 14-pin TSSOP (PW) and SOIC (D) packages.

Technical Context

The LMV339MT implements four independent voltage comparators using bipolar input and output stages fabricated on TI's Submicron Silicon-Gate BiCMOS process - delivering improved noise immunity versus CMOS-only alternatives. Its input stage supports common-mode voltages down to −0.1 V (below ground) and up to 0.8 V below V+, enabling direct sensing of signals referenced to system ground.

Each channel features an open-collector NPN output requiring an external pull-up resistor (1 kΩ to 10 kΩ recommended), allowing flexible level translation and wired-OR functionality across multiple comparators or logic families including TTL and CMOS. Propagation delay is tightly specified across supply (2.7 V and 5 V) and temperature (−40°C to +85°C), with input offset voltage limited to 7 mV typical and 9 mV max over temperature.

Key Specifications

Pinout & Package

LMV339MT is available in 14-pin TSSOP (PW) package (5.00 mm × 4.40 mm body size), optimized for high-density PCB layouts. Pin functions are identical to the 14-pin SOIC variant (D package), supporting drop-in replacement where footprint permits.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM339DR and TLV339IPWR, the LMV339MT uniquely balances industrial temperature support, ground-sensing capability, sub-200 ns speed, and <200 µA quiescent current - making it the most suitable choice for battery-powered equipment requiring robust, low-power threshold detection across full operating conditions.

Availability

LMV339MT is available at Aetrix Electronics and suitable for battery-powered electronics, portable medical devices, and industrial sensor interfaces requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for LMV339MT 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 company headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with over 90 years of innovation in precision signal chain and power management solutions.

The LMV339MT belongs to TI's LMV33x-N low-voltage comparator family, engineered specifically for portable and battery-operated applications where minimal supply current, small footprint, and ground-referenced input operation are critical design requirements.

FAQ

What is the maximum operating supply voltage for LMV339MT?

The absolute maximum supply voltage for LMV339MT is 5.5 V, but the recommended operating range is 2.7 V to 5 V. Operation above 5 V risks permanent damage per the Absolute Maximum Ratings table in the SNOS018H datasheet. The LMV339MT is optimized for low-voltage systems such as single-cell Li-ion (2.8–4.2 V) and regulated 3.3 V supplies - not high-voltage industrial rails. Always limit V+ to ≤5.5 V and ensure proper decoupling.

Does LMV339MT support rail-to-rail input operation?

No, the LMV339MT does not support rail-to-rail input. Its input common-mode voltage range extends from −0.1 V to 4.2 V at 5 V supply (or −0.1 V to 2.0 V at 2.7 V), meaning it can sense down to 0.1 V below ground but cannot accept inputs equal to V+ (5 V). This ground-sensing capability enables direct interfacing with shunt-based current monitors and thermistors tied to GND, but V+ must remain ≥0.8 V above the highest expected input signal.

Can LMV339MT outputs drive TTL or CMOS logic directly?

Yes, LMV339MT outputs can drive TTL and CMOS logic directly when used with an appropriate external pull-up resistor (1 kΩ to 10 kΩ) connected to a compatible voltage rail (≤V+). At 5 V supply and 4 mA sink, the output saturates to 200 mV typical - well below the 0.8 V VIH threshold for standard TTL and the 1.5 V threshold for 3.3 V CMOS. Ensure the pull-up voltage does not exceed V+ to avoid damaging the output transistor.

What is the typical propagation delay of LMV339MT at 3.3 V supply?

The LMV339MT datasheet specifies propagation delay only at 2.7 V and 5 V operating points - not at 3.3 V. At 5 V, tPHL/tPLH is 200 ns typical (100 mV overdrive); at 2.7 V, it degrades to 350–1000 ns depending on overdrive. For 3.3 V operation, interpolation suggests ~250–300 ns typical, but actual performance depends on load capacitance and overdrive. Designers should validate timing in-circuit or select the 5 V test condition for worst-case margining.

Is LMV339MT pin-compatible with the industry-standard LM339?

No, LMV339MT is not pin-compatible with LM339. While both are quad comparators in 14-pin packages, LMV339MT uses TI's standardized pinout (e.g., V− on pin 7, V+ on pin 14), whereas LM339 places V+ on pin 16 and V− on pin 4 in DIP/SOIC. The LMV339MT pinout matches TI's LMV33x-N family and is documented in Section 5 (Pin Configuration and Functions) of SNOS018H - requiring PCB layout revision for migration from LM339.