Texas Instruments LMV331IDCKTE4

Overview

LMV331IDCKTE4 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 precise threshold detection in battery-powered vacuum robots and server PSUs.

For engineers reviewing the LMV331IDCKTE4 datasheet, LMV331IDCKTE4 pinout, LMV331IDCKTE4 application, or LMV331IDCKTE4 equivalent, key selection criteria include its SC-70-5 package footprint, 7mV max input offset voltage at 25°C, 1000ns propagation delay (2.7V, 10mV overdrive), open-drain output compatibility with mixed-voltage logic interfaces, and –40°C to +125°C operating temperature range.

Technical Context

The LMV331IDCKTE4 implements a PNP-input stage that enables input common-mode operation down to ground and up to V_CC–0.7V, supporting accurate sensing in 3.3V and 5V systems. Its open-drain NPN output stage sinks current when IN– exceeds IN+, delivering logic-low levels defined by external pull-up voltage - enabling wired-AND functionality and level translation across voltage domains.

It functions exclusively as a voltage comparator with no internal hysteresis; stable operation requires careful layout with local 0.1μF bypass capacitance on V_CC, and design validation of input overdrive (>100mV recommended) to ensure sub-300ns response time and avoid metastability near threshold.

Key Specifications

Pinout & Package

LMV331IDCKTE4 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 LMV331IDCKTE4, LMV331IDBVR offers marginally better thermal performance in larger SOT-23 packaging, while TLV331IDCKR provides lower supply current and improved offset but requires board revision due to reversed input pin assignment.

Availability

LMV331IDCKTE4 is available at Aetrix Electronics and suitable for vacuum robot obstacle detection, server PSU power-good monitoring, and cordless power tool battery protection requiring stable component supply across extended production cycles.

Supply support for LMV331IDCKTE4 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 power management ICs.

The LMV331 series belongs to TI's general-purpose low-voltage comparator product line, engineered for cost-sensitive, space-constrained applications where low power, ground-sensing capability, and open-drain flexibility are critical - especially in portable consumer and industrial control systems.

FAQ

What is the maximum supply voltage for LMV331IDCKTE4?

The absolute maximum supply voltage for LMV331IDCKTE4 is 5.5V. Operation beyond this risks permanent damage. The recommended operating range is 2.7V to 5.5V, making it compatible with standard 3.3V and 5V logic rails as well as single-cell Li-ion (up to 4.2V) and two-cell alkaline systems. Always observe derating guidelines for extended temperature operation.

Does LMV331IDCKTE4 have internal hysteresis?

No, LMV331IDCKTE4 does not include internal hysteresis. It is a basic comparator with no built-in noise immunity. For reliable operation in noisy environments, external hysteresis must be added using positive feedback - typically a resistor from OUT to IN+ - or the application must ensure sufficient input overdrive (>100mV recommended) to avoid metastability near the switching threshold.

Can LMV331IDCKTE4 interface directly with a 1.8V microcontroller GPIO?

Yes, LMV331IDCKTE4 can interface directly with a 1.8V microcontroller GPIO via its open-drain output. Connect a pull-up resistor from the OUT pin to the 1.8V supply. When the comparator asserts low, the output sinks current to ground; when inactive, the pull-up defines a valid 1.8V logic-high level. Ensure the microcontroller input threshold is ≤0.63V (35% of 1.8V) to reliably detect the low state.

What is the input bias current specification for LMV331IDCKTE4 at 85°C?

At 85°C, the input bias current for LMV331IDCKTE4 is specified at a maximum of 400nA. This value is confirmed in Section 5.5 (Electrical Characteristics, V_CC+ = 2.7V) and Section 5.7 (V_CC+ = 5V) of the datasheet across the full –40°C to +125°C operating range. This low bias current preserves accuracy in high-impedance voltage divider networks used for battery monitoring or sensor interfacing.

Is LMV331IDCKTE4 RoHS compliant and lead-free?

Yes, LMV331IDCKTE4 is RoHS compliant and lead-free. Per the TI Packaging Information addendum, the part uses NiPdAu (NIPDAU) lead finish and carries a Level-1 MSL rating (260°C peak reflow, unlimited floor life). The "E4" suffix explicitly denotes TI's green, lead-free, RoHS-compliant packaging standard, verified in the official orderable addendum dated March 2026.