Texas Instruments LMV339MX

Overview

LMV339MX from Texas Instruments is a quad low-voltage comparator IC with open-collector outputs, designed for space-constrained portable electronics operating from 2.7 V to 5 V. It delivers 140–200 µA total supply current (35–50 µA per channel), 200 mV typical output saturation voltage at 4 mA sink, and 200 ns propagation delay at 5 V with 100 mV overdrive - enabling precise threshold detection in battery-powered sensor interfaces and power management circuits.

For engineers reviewing the LMV339MX datasheet, LMV339MX pinout, LMV339MX application, or LMV339MX equivalent, key selection considerations include its ground-sensing input range (−0.1 V to 4.2 V at 5 V), industrial temperature rating (−40°C to +85°C), SOIC-14 package compatibility, and open-collector output configuration requiring external pull-up for wired-OR logic or level translation.

Technical Context

The LMV339MX implements four independent voltage comparators with bipolar input and output stages fabricated on TI's Submicron Silicon-Gate BiCMOS process - delivering improved noise immunity versus CMOS-only alternatives. Each channel compares differential input voltage between non-inverting (+IN) and inverting (−IN) terminals, driving an open-collector NPN output that sinks current when +IN > −IN.

Its input common-mode range extends 0.1 V below ground and up to 0.8 V below V+, supporting single-supply operation with rail-to-rail input capability near ground. The output stage requires an external pull-up resistor (1 kΩ to 10 kΩ) tied to any supply ≤ V+ to generate valid logic-high levels or enable wired-OR configurations such as window detectors.

Key Specifications

Pinout & Package

LMV339MX is packaged in a 14-pin SOIC (Small Outline Integrated Circuit) with 8.65 mm × 3.91 mm body size and standard 1.27 mm pitch - compatible with automated SMT assembly and legacy PCB footprints for LM339/LM2901.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV339MX, LM339DR offers broader voltage tolerance but sacrifices low-voltage efficiency and speed, while TLV339IPWR improves power and integration at the cost of open-collector flexibility and legacy footprint compatibility.

Availability

LMV339MX is available at Aetrix Electronics and suitable for battery-powered electronics, industrial sensor interfaces, and portable medical devices requiring stable component supply across long production lifecycles.

Supply support for LMV339MX 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 LMV339MX belongs to TI's LMV3xx-N general-purpose comparator family, engineered specifically for cost-sensitive, space-constrained applications where low voltage operation, ground-sensing inputs, and open-collector flexibility are essential - such as consumer portables and industrial IoT endpoints.

FAQ

What is the maximum supply voltage for LMV339MX?

The absolute maximum supply voltage for LMV339MX 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. At 5 V, LMV339MX achieves optimal propagation delay (200 ns) and output saturation voltage (200 mV), making it ideal for standard 5 V logic interfacing. Always limit V+ to ≤5 V in production designs.

Does LMV339MX support rail-to-rail input operation?

LMV339MX supports input voltages down to −0.1 V (below ground) and up to 4.2 V (at 5 V supply), which covers the full ground-referenced range but does not extend to the positive rail. Its input common-mode range is specified as −0.1 V to (V+ − 0.8 V), so at 2.7 V supply it reaches up to 1.9 V. This "ground-sensing" capability enables direct connection of 0 V–referenced sensors without level shifting, but true rail-to-rail input requires alternatives like TLV339.

Can LMV339MX outputs drive TTL or CMOS logic directly?

Yes - LMV339MX open-collector outputs can drive TTL and CMOS logic when used with an appropriate external pull-up resistor (1 kΩ to 10 kΩ) tied to a supply ≤ V+. For 5 V TTL, pull up to 5 V; for 3.3 V CMOS, pull up to 3.3 V. The output sinks ≥8 mA at VO ≤ 1.5 V (5 V supply), exceeding standard TTL fan-out requirements. Ensure the pull-up voltage does not exceed V+ to avoid damaging the output transistor.

What is the typical input bias current of LMV339MX?

The typical input bias current for LMV339MX is 25 nA at 25°C and 5 V supply, with a maximum of 400 nA across the full −40°C to +85°C temperature range. This low bias current minimizes loading errors in high-impedance sensor interfaces (e.g., thermistors, photodiodes) and ensures stable reference divider operation without significant current injection into the −IN node.

Is LMV339MX pin-compatible with standard LM339 packages?

LMV339MX in SOIC-14 is pin-compatible with industry-standard LM339DR and LM2901 in the same package - sharing identical pin functions (e.g., pin 1 = +IN A, pin 2 = −IN A, pin 3 = OUT A, etc.) and mechanical footprint. This allows drop-in replacement in existing designs targeting lower supply current and improved 2.7 V operation, provided the system's supply voltage and temperature range align with LMV339MX specifications.