Texas Instruments LMV393M

Overview

LMV393M from Texas Instruments is a dual, low-voltage, rail-to-ground input comparator with open-collector outputs, designed for portable and battery-powered systems. It operates from 2.7 V to 5 V, draws only 100 µA total supply current (50 µA/channel), features 7 mV typical input offset voltage, 200 ns propagation delay at 5 V, and supports industrial temperature range (−40°C to +85°C). It is used in voltage monitoring, level detection, and window comparator circuits in handheld devices.

For engineers reviewing the LMV393M datasheet, LMV393M pinout, LMV393M application, or LMV393M equivalent, key selection considerations include its 2.7–5 V single-supply operation, ground-sensing input common-mode range (−0.1 V to 4.2 V at 5 V), open-collector output requiring external pull-up, low quiescent current, and SOIC-8/VSSOP-8 package compatibility.

Technical Context

The LMV393M implements two independent comparators with bipolar input stages and NPN open-collector outputs, enabling wired-OR logic and flexible level translation. Its input stage includes rail-to-ground common-mode capability, allowing direct sensing of signals referenced to system ground - critical for battery voltage monitoring and low-side current sensing.

Propagation delay is specified down to 200 ns (at 5 V, 100 mV overdrive), with saturation voltage of 200 mV at 4 mA sink current. The device uses TI's Submicron Silicon-Gate BiCMOS process, balancing speed, noise immunity, and ultra-low power consumption without compromising DC precision.

Key Specifications

Pinout & Package

LMV393M is available in 8-pin SOIC (D) and VSSOP (DGK) packages - both 3.00 mm × 3.00 mm footprint for VSSOP and 4.90 mm × 3.91 mm for SOIC. Pin functions are identical across packages.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual open-collector comparator applications.

Compared with LM393DR, LMV393M delivers 20× lower supply current and 6× faster response at low voltage, making it superior for battery-constrained designs; versus TLV3702IDR, LMV393M provides true ground-referenced input and open-collector flexibility at the cost of requiring a pull-up resistor.

Availability

LMV393M is available at Aetrix Electronics and suitable for battery voltage monitoring, portable sensor interfaces, low-power oscillator circuits, and industrial level-detection applications requiring stable component supply across long production lifecycles.

Supply support for LMV393M 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 and embedded processing solutions, with decades of expertise in precision analog, low-power design, and high-volume manufacturing.

The LMV3xx-N series was developed specifically for space-constrained, battery-operated consumer electronics - emphasizing ultra-low quiescent current, ground-sensing capability, and small-footprint packaging without sacrificing speed or precision.

FAQ

What is the minimum supply voltage for reliable operation of the LMV393M?

The LMV393M is fully specified and ensured for operation down to 2.7 V, with all electrical characteristics (including propagation delay, input offset, and output saturation) guaranteed across the full industrial temperature range. Operation below 2.7 V is not characterized and may result in degraded performance or failure to meet datasheet limits. For designs targeting 2.5 V or lower rails, consider alternative comparators explicitly rated for that range.

Does the LMV393M support rail-to-rail input voltage range?

No - the LMV393M supports rail-to-ground input, not rail-to-rail. Its input common-mode range extends from −0.1 V to (V+ − 0.8 V); at 5 V supply, this is −0.1 V to 4.2 V. It does not accept inputs equal to V+ (5 V). For true rail-to-rail input capability, TI's TLV3702 or TLV1702 are functionally closer alternatives, though they lack the same ground-sensing margin below V−.

Can the LMV393M outputs be directly connected together for wired-OR logic?

Yes - the LMV393M features open-collector outputs, allowing multiple OUT pins (e.g., OUT A and OUT B) or outputs from other compatible comparators to be tied together with a single pull-up resistor. This configuration implements logical OR behavior: the combined output goes low if any comparator asserts. Ensure the shared pull-up resistor is sized between 1 kΩ and 10 kΩ to balance speed and power consumption.

What is the maximum sink current capability of the LMV393M output?

The LMV393M output can sink up to 23 mA per channel at 2.7 V supply and 10 mA per channel at 5 V supply, with saturation voltage ≤200 mV at 4 mA (5 V). Sustained sink currents above 10 mA at 5 V increase output saturation voltage and junction temperature; for continuous >10 mA loads, verify thermal derating using θJA = 190°C/W (SOIC) or 23°C/W (VSSOP) and ensure TJ remains ≤125°C.

Is the LMV393M pin-compatible with the LM393?

No - while both are dual comparators with open-collector outputs, the LMV393M (SOIC-8/VSSOP-8) uses a different pinout than the legacy LM393 (SOIC-8). Specifically, LMV393M assigns V− to pin 4 and V+ to pin 5, whereas LM393 places V+ on pin 8 and V− on pin 4. Direct replacement requires PCB layout revision. Always verify pin mapping using the official TI datasheet SNOS018H before substitution.