Texas Instruments LMV393MX/NOPB

Overview

LMV393MX/NOPB from Texas Instruments is a dual, low-voltage, rail-to-rail input comparator with open-collector outputs, designed for space-constrained portable systems. It operates from 2.7 V to 5 V, draws only 100 µA total supply current (50 µA/channel), delivers 200 ns propagation delay at 5 V, and supports input common-mode voltage down to −0.1 V (ground-sensing), enabling direct interface with battery-monitoring and sensor signal chains in notebooks and PDAs.

For engineers reviewing the LMV393MX/NOPB datasheet, LMV393MX/NOPB pinout, LMV393MX/NOPB application, or LMV393MX/NOPB equivalent, key selection criteria include its guaranteed 2.7-V/5-V performance, industrial temperature range (−40°C to +85°C), low output saturation voltage (200 mV @ 4 mA), open-collector wired-OR capability, and VSSOP-8 package compatibility with high-density PCB layouts.

Technical Context

The LMV393MX/NOPB implements two independent comparators using bipolar input and output stages on TI's Submicron BiCMOS process-delivering improved noise immunity over CMOS-only alternatives while maintaining ultra-low quiescent current. Its ground-sensing input stage allows direct connection of single-ended sensors referenced to system ground without level-shifting circuitry.

Each channel features an open-collector NPN output requiring an external pull-up resistor (1 kΩ–10 kΩ) to any supply ≤ V+, enabling flexible logic interfacing (TTL/CMOS), window detection via wired-OR, and multi-comparator alarm aggregation without additional logic gates.

Key Specifications

Pinout & Package

VSSOP-8 package (3.00 mm × 3.00 mm), thermally enhanced for compact portable designs; pin-compatible with SOIC-8 but with 45% smaller footprint and lower θ_JA (23°C/W vs. 190°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual low-voltage comparator applications.

Compared with LMV393MX/NOPB, LMV393IDR offers identical performance in a larger SOIC package ideal for hand-soldering or legacy designs, while TLV3702IDR trades open-collector versatility for lower current and faster speed - making LMV393MX/NOPB the optimal balance of size, interface flexibility, and power in portable systems.

Availability

LMV393MX/NOPB is available at Aetrix Electronics and suitable for battery voltage monitoring, portable device power sequencing, sensor signal threshold detection, and low-power window comparator applications requiring stable component supply across high-mix, low-volume production runs.

Supply support for LMV393MX/NOPB 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 solutions.

The LMV393MX/NOPB belongs to TI's general-purpose low-voltage comparator family, engineered specifically for cost-sensitive, space-constrained portable electronics where ground-sensing capability, ultra-low power, and open-collector flexibility are essential.

FAQ

What is the maximum supply voltage rating for the LMV393MX/NOPB?

The absolute maximum supply voltage for the LMV393MX/NOPB is 5.5 V, but the recommended operating range is 2.7 V to 5 V. Operation above 5 V risks permanent damage, and performance parameters like propagation delay and offset voltage are only specified and guaranteed within the 2.7–5 V range per the official TI datasheet SNOS018H.

Does the LMV393MX/NOPB support true rail-to-rail input operation?

The LMV393MX/NOPB supports rail-to-rail *input common-mode range*, extending from −0.1 V (below ground) to 4.2 V (at 5 V supply). This ground-sensing capability enables direct interface with 0 V–referenced signals, but the input stage is not rail-to-rail in the sense of accepting V+ as a valid input voltage - the upper limit remains ~0.8 V below V+.

Can the LMV393MX/NOPB outputs drive a 3.3 V logic input directly?

Yes - the LMV393MX/NOPB open-collector outputs can drive 3.3 V logic inputs when pulled up to 3.3 V via an external resistor (1–10 kΩ). With 4 mA sink current, the output saturation voltage stays ≤200 mV, ensuring a solid LOW state compatible with standard 3.3 V TTL and CMOS logic families.

Is the LMV393MX/NOPB pin-compatible with the industry-standard LM393?

No - while functionally similar as a dual comparator, the LMV393MX/NOPB uses an 8-pin VSSOP package with different pin assignments than the 8-pin SOIC LM393. Specifically, LMV393MX/NOPB places V− on Pin 4 and V+ on Pin 5, whereas LM393 assigns V+ to Pin 8 and V− to Pin 4. Direct replacement requires PCB redesign.

What is the thermal performance advantage of the VSSOP-8 package in the LMV393MX/NOPB?

The VSSOP-8 package of the LMV393MX/NOPB achieves a junction-to-ambient thermal resistance (θ_JA) of 23°C/W - significantly lower than the 190°C/W of the SOIC-8 variant. This 88% improvement enables higher sustained output current or operation in thermally constrained environments without derating, critical for dense portable PCB layouts.