Texas Instruments LMV331IDCKRE4

Overview

LMV331IDCKRE4 from Texas Instruments is a single-channel, low-voltage, open-collector comparator optimized for portable and space-constrained applications. It operates from 2.7V to 5.5V, draws only 26 μA typical supply current, features rail-to-rail input common-mode range including ground, and delivers 150 mV typical output saturation voltage - enabling direct interfacing with 1.8V/3.3V logic in battery-powered vacuum robots and server PSUs.

For engineers reviewing the LMV331IDCKRE4 datasheet, LMV331IDCKRE4 pinout, LMV331IDCKRE4 application, or LMV331IDCKRE4 equivalent, key selection criteria include its SC-70-5 package footprint, guaranteed operation down to –40°C, open-drain output flexibility for level-shifting, and verified performance at both 2.7V and 5V supply rails.

Technical Context

The LMV331IDCKRE4 implements a PNP-input stage that enables input common-mode voltage operation down to ground (–0.1 V minimum) and up to V_CC – 0.7 V, supporting accurate sensing in low-voltage systems. Its open-drain NPN output stage sinks up to 23 mA (at 2.7V) and allows external pull-up to any logic rail - enabling bidirectional level translation between disparate voltage domains.

Propagation delay is supply- and overdrive-dependent: at 5V and 100 mV overdrive, t_PHL = 200 ns and t_PLH = 300 ns; at 2.7V and same overdrive, delays increase to 350 ns and 400 ns respectively. Input offset voltage remains ≤7 mV (typ) across 25°C and ≤9 mV (max) over –40°C to 125°C.

Key Specifications

Pinout & Package

LMV331IDCKRE4 is housed in a 5-pin SC-70 (DCK) package measuring 1.25 mm × 2.00 mm, optimized for high-density PCB layouts in compact consumer and industrial modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV331DBVR and LMV331QDBVRQ1, LMV331IDCKRE4 provides the optimal balance of ultra-low power (26 μA), industrial temperature range (–40°C to 125°C), and cost-effective SC-70 packaging - making it ideal for high-volume consumer and industrial applications where AEC-Q100 is not required but robustness is essential.

Availability

LMV331IDCKRE4 is available at Aetrix Electronics and suitable for vacuum robot battery management, server PSU fault detection, and cordless power tool motor control requiring stable component supply across long production lifecycles.

Supply support for LMV331IDCKRE4 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 comparators and low-power signal-chain components.

The LMV331 series was designed specifically for cost-sensitive, space-constrained applications demanding low-voltage operation, minimal quiescent current, and robust performance across industrial temperature ranges - targeting portable electronics, power management, and smart appliances.

FAQ

What is the maximum operating temperature for LMV331IDCKRE4?

The LMV331IDCKRE4 is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per TI's production test flow and applies to the SC-70 package variant. At 125°C, supply current rises to 150 μA max and input offset voltage remains ≤9 mV, ensuring reliable performance in thermally demanding environments like enclosed power tools or server chassis.

Does LMV331IDCKRE4 support rail-to-rail input operation?

LMV331IDCKRE4 supports input common-mode voltage from –0.1 V to V_CC–0.7 V, which includes ground but does not extend fully to V_CC. This enables true ground-referenced sensing (e.g., current shunt monitoring) without external biasing, though inputs above V_CC–0.7 V may cause incorrect output states. The PNP input stage defines this limitation, confirmed in Section 6.3 of the datasheet.

What is the recommended bypass capacitor for LMV331IDCKRE4?

A 0.1 μF ceramic capacitor placed between V_CC+ and GND, as close as possible to the LMV331IDCKRE4 pins, is explicitly recommended in Section 9.2 of the datasheet. This minimizes supply noise-induced errors in high-speed comparisons and stabilizes the input common-mode range during transient load changes - critical for accurate OVP/UVP detection in server PSUs.

Can LMV331IDCKRE4 drive an LED directly?

Yes - the LMV331IDCKRE4 open-drain output can sink up to 23 mA at 2.7V (Section 5.5), sufficient to drive standard indicator LEDs with appropriate series resistance. For example, with a 5V pull-up and 2 mA LED current, a 2.2 kΩ resistor yields ~1.8V forward drop and full brightness while staying within safe output current limits across temperature.

Is LMV331IDCKRE4 pin-compatible with other SC-70-5 comparators?

LMV331IDCKRE4 uses the standard SC-70-5 pinout (IN+, IN−, GND, OUT, V_CC+), matching industry conventions for single comparators. While electrical behavior differs, mechanical compatibility with footprints for TLV331DBVR or MAX9021ASA+ is confirmed by TI's package drawings. Always verify schematic symbol polarity and reference designators before substitution.