Diodes Incorporated LMV331SE-7

Overview

LMV331SE-7 from Diodes Incorporated is a single-channel, low-voltage general-purpose comparator in SOT353 package, operating from 2.7V to 5.5V supply, featuring 40 µA typical supply current, open-collector output, and –0.1 V to +2.0 V input common-mode range at 2.7V. It enables precise voltage-level detection in space-constrained portable electronics such as battery monitors and power sequencers.

For engineers reviewing the LMV331SE-7 datasheet, LMV331SE-7 pinout, LMV331SE-7 application, or LMV331SE-7 equivalent, key selection criteria include its rail-to-rail-compatible input range, ultra-low quiescent current, open-drain flexibility for wired-OR logic, and guaranteed operation across –40°C to +125°C industrial temperature range.

Technical Context

The LMV331SE-7 uses BiCMOS process architecture with bipolar input and output stages, delivering improved noise immunity over CMOS-only comparators while maintaining low power. Its open-collector output requires an external pull-up resistor (1–10 kΩ) to interface with TTL/CMOS logic or drive LEDs and MOSFET gates.

It supports single-supply operation with input common-mode voltage extending 0.1 V below ground and up to 0.8 V below VCC - enabling direct sensing of ground-referenced signals without level-shifting. Propagation delay is 350 ns (high-to-low, 100 mV overdrive, 5 V supply), optimized for response-critical threshold detection in power management circuits.

Key Specifications

Pinout & Package

SOT353 (5-pin, 2.1 mm × 1.3 mm × 0.95 mm) surface-mount package with moisture sensitivity level (MSL) 1 and RoHS-compliant "Green" molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV331DBVR and MAX9021AXK+T, the LMV331SE-7 delivers the lowest combination of supply current and propagation delay in SOT353, with unique ground-sensing capability and open-collector versatility for industrial and portable designs.

Availability

LMV331SE-7 is available at Aetrix Electronics and suitable for battery-powered devices, portable medical sensors, and automotive body-control modules requiring stable component supply and long-term manufacturability.

Supply support for LMV331SE-7 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

Diodes Incorporated is a global semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers across Asia, Europe, and the U.S., serving industrial, computing, consumer, and automotive markets.

The LMV331SE-7 belongs to Diodes' general-purpose low-voltage comparator product line, engineered specifically for cost-sensitive, space-constrained applications where ultra-low power, wide temperature operation, and robust input stage performance are essential.

FAQ

What is the maximum sink current capability of the LMV331SE-7 output?

The LMV331SE-7 output can sink up to 23 mA at V_O ≤ 1.5 V and 2.7 V supply, and up to 84 mA at 5 V supply with V_O ≤ 1.5 V. This allows direct driving of small LEDs, MOSFET gates, or logic inputs without additional buffering, provided the external pull-up resistor is sized accordingly to limit power dissipation.

Does the LMV331SE-7 require a dual supply to operate?

No - the LMV331SE-7 is designed for single-supply operation with VEE connected to ground. Its input common-mode range extends to –0.1 V below VEE, enabling detection of signals referenced to ground without level-shifting circuitry. A bypass capacitor (≥0.1 µF) must be placed between VCC and VEE pins.

Can the LMV331SE-7 interface directly with 5 V TTL logic?

Yes, when used with a 5 V pull-up resistor (e.g., 4.7 kΩ), the open-collector output achieves a valid HIGH level for TTL inputs. The output saturation voltage remains ≤120 mV at 1 mA sink current, ensuring solid LOW-level compatibility. No level-shifter is needed, though rise time depends on pull-up value and capacitive load.

Is the LMV331SE-7 pin-compatible with other SOT353 comparators like the TLV331?

No - although both use SOT353 packages, the LMV331SE-7 has pin 2 as VEE (ground) and pin 4 as OUT, whereas TLV331DBVR assigns pin 2 to OUT and pin 4 to GND. Swapping these parts without PCB revision will cause functional failure due to incorrect supply and output connections.