Texas Instruments LMV331IDCKRG4

Overview

LMV331IDCKRG4 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 26μA typical supply current, features rail-to-rail input common-mode range including ground, and delivers 150mV typical output saturation voltage - enabling direct interface with 1.8V/3.3V logic in battery-powered vacuum robots and server PSUs.

For engineers reviewing the LMV331IDCKRG4 datasheet, LMV331IDCKRG4 pinout, LMV331IDCKRG4 application, or LMV331IDCKRG4 equivalent, key selection criteria include its SC-70-5 package footprint, guaranteed operation down to –40°C, open-drain flexibility for level-shifting, and compatibility with low-power microcontroller wake-up and overvoltage detection circuits.

Technical Context

The LMV331IDCKRG4 implements a PNP-input stage that enables input common-mode voltage down to ground (–0.1V min) and up to V_CC – 0.7V, supporting accurate sensing in single-supply 3.3V and 5V systems. Its open-drain NPN output stage sinks up to 23mA (at 2.7V) and supports wired-AND logic, external pull-up voltage selection, and bidirectional level translation.

It functions strictly as a voltage comparator - not an amplifier - with propagation delays of 1000ns (high-to-low, 10mV overdrive, 2.7V supply) and 600ns (same condition at 5V), and input offset voltage tightly specified at ±7mV max across temperature.

Key Specifications

Pinout & Package

LMV331IDCKRG4 is housed in a 5-pin SC-70 (DCK) package measuring 1.25mm × 2.00mm, 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 TLV331IDBVR and NCS2200SN2T1G, LMV331IDCKRG4 offers the lowest supply current in SC-70 packaging and retains open-drain configurability - making it optimal for ultra-low-power, multi-voltage interface, and wired-AND applications where external pull-up voltage independence is required.

Availability

LMV331IDCKRG4 is available at Aetrix Electronics and suitable for vacuum robot obstacle detection, server PSU overvoltage protection, and cordless power tool battery management requiring stable component supply across extended production lifecycles.

Supply support for LMV331IDCKRG4 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, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.

The LMV331IDCKRG4 belongs to TI's general-purpose low-voltage comparator family, designed specifically for cost-sensitive, space-constrained, and battery-operated applications demanding minimal power and robust ground-sensing capability.

FAQ

What is the maximum operating temperature for LMV331IDCKRG4?

The LMV331IDCKRG4 is rated for continuous operation from –40°C to +125°C ambient temperature. This specification is validated per TI's thermal testing protocols and applies across the full 2.7V–5.5V supply range. The device's R_θJA of 238°C/W in SC-70 packaging ensures thermal stability in sealed enclosures like vacuum robot housings or server PSU modules when proper PCB copper pour is used.

Does LMV331IDCKRG4 require an external pull-up resistor on the output?

Yes, LMV331IDCKRG4 has an open-drain output and requires an external pull-up resistor to define the logic-high voltage level. The value depends on speed and drive strength needs - e.g., 10kΩ for low-power wake-up flags, 1kΩ for faster transitions. Pull-up voltage may differ from V_CC, enabling level shifting; LMV331IDCKRG4 itself does not source current on the output pin.

Can LMV331IDCKRG4 operate from a 1.8V supply?

No, LMV331IDCKRG4 has a minimum recommended supply voltage of 2.7V per its absolute maximum and operating conditions tables. Attempting operation below 2.7V may result in undefined behavior, increased propagation delay, or failure to meet input common-mode or output saturation specifications. For 1.8V systems, consider TI's TLV360x or ON Semiconductor's NCS2200 series instead of LMV331IDCKRG4.

What is the input common-mode voltage range of LMV331IDCKRG4 at 5V supply?

At V_CC = 5V, the input common-mode voltage range of LMV331IDCKRG4 is –0.1V to 4.2V, as specified in Section 5.7 of the datasheet. This range allows both inputs to operate down to ground (enabling single-supply sensor interfacing) and up to 4.2V - sufficient for monitoring 3.3V logic levels or battery voltages without attenuation. Operation beyond this range risks incorrect output states.

Is LMV331IDCKRG4 pin-compatible with other SC-70 comparators like TLV331?

LMV331IDCKRG4 and TLV331IDBVR share identical SC-70-5 pinouts (IN+, GND, IN−, OUT, V_CC), but TLV331 uses SOT-23-5 packaging - not SC-70. The correct SC-70 pin-compatible alternative is TLV331IDCKR, which matches LMV331IDCKRG4's 1.25mm × 2.00mm footprint, pad layout, and thermal profile. Always verify land pattern dimensions before substitution, as SC-70 and SOT-23 have different lead pitches and body sizes.