Texas Instruments LMV393MMX

Overview

LMV393MMX from Texas Instruments is a dual, low-voltage, rail-to-rail input comparator with open-collector outputs, designed for space-constrained portable electronics. It operates from 2.7 V to 5 V, draws only 100 µA per channel (typical at 5 V), features 7 mV input offset voltage, and delivers 200 ns propagation delay (at 100 mV overdrive, 5 V supply). It is used in battery-powered voltage monitoring and level detection circuits.

For engineers reviewing the LMV393MMX datasheet, LMV393MMX pinout, LMV393MMX application, or LMV393MMX equivalent, key selection criteria include its 2.7–5 V single-supply operation, ground-sensing input range (−0.1 V to 4.2 V), 200 mV output saturation voltage at 4 mA sink, 8-pin VSSOP package (3.0 mm × 3.0 mm), and compatibility with wired-OR logic configurations.

Technical Context

The LMV393MMX implements a bipolar-input, BiCMOS-output architecture optimized for low-noise performance and fast response in low-voltage systems. Its input stage supports common-mode voltages down to −0.1 V (below ground) and up to 0.8 V below V+, enabling true ground-referenced sensing without level-shifting circuitry.

It uses an open-collector NPN output stage requiring an external pull-up resistor (1 kΩ to 10 kΩ), allowing flexible interfacing with CMOS/TTL logic at voltages ≤ V+ and enabling wired-OR functionality across multiple comparators - critical for window detection and alarm consolidation in portable power management.

Key Specifications

Pinout & Package

LMV393MMX is packaged in an 8-pin VSSOP (DGK) package measuring 3.00 mm × 3.00 mm, optimized for high-density PCB layouts in handheld devices.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LMV393MMX, LM393DR offers broader voltage support but sacrifices speed and efficiency in low-voltage use cases, while TLV3702IDR improves power efficiency and output drive but eliminates wired-OR functionality - making LMV393MMX the optimal choice for space-constrained, battery-powered systems requiring flexible logic interfacing.

Availability

LMV393MMX is available at Aetrix Electronics and suitable for battery voltage monitoring, power sequencing control, overvoltage protection, and window comparator applications requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.

Supply support for LMV393MMX 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 LMV393MMX belongs to TI's LMV3xx-N general-purpose comparator family, engineered specifically for cost-sensitive, space-constrained portable electronics where low supply voltage, minimal quiescent current, and ground-sensing capability are essential.

FAQ

What is the maximum supply voltage rating for LMV393MMX?

The absolute maximum supply voltage for LMV393MMX is 5.5 V, as specified in the Absolute Maximum Ratings table. Operation above 5 V risks permanent damage. The device is characterized and guaranteed for reliable operation between 2.7 V and 5 V - making it ideal for single-cell Li-ion (3.0–4.2 V) and regulated 3.3 V or 5 V systems. Exceeding 5.5 V, even momentarily during power-up transients, violates the stress rating and may degrade long-term reliability.

Does LMV393MMX support rail-to-rail input common-mode range?

LMV393MMX supports rail-to-rail *input* common-mode range only on the lower end: its input stage operates down to −0.1 V (below ground) and up to 4.2 V at 5 V supply - i.e., 0.8 V below V+. It does not reach the positive rail. This "ground-sensing" capability enables direct 0 V reference detection, but full rail-to-rail input (to V+) requires alternative comparators like the TLV3702. For most battery monitor and level-shift-free applications, the −0.1 V to 4.2 V range is sufficient and intentional for noise immunity.

Can LMV393MMX outputs be directly connected to 3.3 V logic without a level shifter?

Yes - LMV393MMX outputs can interface directly with 3.3 V logic, provided the external pull-up resistor connects to a 3.3 V supply (≤ V+). Since LMV393MMX operates down to 2.7 V, a 3.3 V pull-up is valid when V+ = 3.3 V or higher. The output saturates to ≤200 mV at 4 mA sink, ensuring solid logic-low recognition by 3.3 V CMOS inputs. No level shifter is needed, but the pull-up must not exceed the LMV393MMX supply voltage (V+).

Is LMV393MMX pin-compatible with standard LM393 packages?

No - LMV393MMX is supplied in an 8-pin VSSOP (DGK) package (3.0 mm × 3.0 mm), whereas standard LM393 variants commonly use SOIC-8 (4.9 mm × 3.91 mm). Pin functions are identical (1:+INA, 2:−INA, 3:OUTA, 4:V−, 5:V+, 6:−INB, 7:+INB, 8:OUTB), but the smaller VSSOP footprint requires PCB layout revision. There is no mechanical or solder-reflow compatibility with SOIC footprints; migration demands board redesign, though schematic connectivity remains unchanged.

What is the typical input bias current of LMV393MMX at 25°C and 5 V supply?

The typical input bias current for LMV393MMX is 25 nA at 25°C and 5 V supply, with a maximum of 250 nA across temperature (−40°C to +85°C). This low bias current minimizes loading errors in high-impedance sensing networks - such as those used with thermistors or photodiodes - preserving accuracy without requiring buffer amplifiers. The value is confirmed in Section 6.7 (5-V DC Electrical Characteristics) of the SNOS018H datasheet.