Diodes Incorporated LMV331W5-7

Overview

LMV331W5-7 from Diodes Incorporated is a single-channel, low-voltage general-purpose comparator in SOT25 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 serves as a precision threshold detector in battery-powered portable electronics where space, power, and cost constraints are critical.

For engineers reviewing the LMV331W5-7 datasheet, LMV331W5-7 pinout, LMV331W5-7 application, or LMV331W5-7 equivalent, key selection considerations include its rail-to-rail input capability down to ground, propagation delay under 1 µs at 100 mV overdrive, guaranteed operation across –40°C to +125°C, and compatibility with standard 5-pin SOT footprint layouts for compact PCB integration.

Technical Context

The LMV331W5-7 implements a BiCMOS architecture with bipolar input and output stages, enabling low noise and stable performance at sub-3V operation. Its open-collector output requires an external pull-up resistor (1–10 kΩ) and supports wired-OR logic and level translation across voltage domains.

Input stage design allows common-mode voltage to extend 0.1 V below VEE (typically GND), making it suitable for ground-referenced sensing. Propagation delay is asymmetric-tPLH (400–500 ns) and tPHL (350–1000 ns) vary with supply voltage and overdrive, reflecting optimized sinking versus sourcing behavior in comparator switching.

Key Specifications

Pinout & Package

SOT25 (5-pin, 1.6 mm × 2.8 mm × 1.1 mm) surface-mount package with gull-wing leads, RoHS-compliant and halogen-free molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV331IDBVR and MAX9021AXK+T, the LMV331W5-7 uniquely balances ultra-low quiescent current, extended temperature rating, open-collector flexibility, and full 2.7–5.5 V operation-making it optimal for space-constrained, battery-critical industrial and portable designs.

Availability

LMV331W5-7 is available at Aetrix Electronics and suitable for battery voltage monitoring, power sequencing control, portable sensor interfaces, and LED dimming threshold detection requiring stable component supply across automotive, industrial, and consumer product lifecycles.

Supply support for LMV331W5-7 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 manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, energy-efficient components for power management, signal integrity, and protection applications.

The LMV331 series belongs to Diodes' general-purpose analog comparator product line, engineered specifically for cost-sensitive, low-voltage portable systems where minimal board space and long battery life are essential design goals.

FAQ

Does LMV331W5-7 require an external pull-up resistor on the output?

Yes - the LMV331W5-7 features an open-collector output that must be pulled up externally to a valid logic high voltage. A 4.7 kΩ resistor to VCC is recommended for most 3.3 V or 5 V applications, balancing speed and power consumption. Without this resistor, the output remains floating and cannot drive logic inputs reliably.

Can LMV331W5-7 operate with a single 2.7 V supply and detect signals down to ground?

Yes - its input common-mode voltage range extends to –0.1 V relative to VEE (GND), allowing direct connection of ground-referenced sensors like thermistors or photodiodes. This eliminates level-shifting circuitry and reduces component count in low-voltage sensing paths.

What is the maximum sink current capability of the LMV331W5-7 output?

The LMV331W5-7 can sink up to 23 mA at V_O ≤ 1.5 V with 2.7 V supply, and up to 84 mA at V_O ≤ 1.5 V with 5 V supply. This enables direct driving of LEDs, small relays, or logic inputs without additional buffer transistors in many portable applications.

Is LMV331W5-7 pin-compatible with other SOT25 comparators like the TLV331?

No - although both use SOT25 packages, pin assignments differ: LMV331W5-7 uses Pin 1=IN+, Pin 2=VEE, Pin 3=IN−, Pin 4=OUT, Pin 5=VCC; TLV331 uses Pin 1=OUT, Pin 2=IN−, Pin 3=IN+, Pin 4=GND, Pin 5=VCC. Layout redesign is required for substitution.