Texas Instruments TL331IDBVR

Overview

TL331IDBVR from Texas Instruments is a single, open-collector output voltage comparator in SOT-23-5 package, designed for high-voltage industrial sensing and level-shifting applications. It operates from 2 V to 36 V supply, delivers 430 µA quiescent current at 36 V, achieves ±0.37 mV typical input offset voltage, and provides 1 µs propagation delay - enabling fast, low-power threshold detection in server PSUs and motor drives.

For engineers reviewing the TL331IDBVR datasheet, TL331IDBVR pinout, TL331IDBVR application, or TL331IDBVR equivalent, this page delivers verified electrical specifications, validated SOT-23-5 terminal mapping, real-world use cases in vacuum robots and cordless power tools, and two confirmed alternative comparators with documented functional and packaging differences.

Technical Context

The TL331IDBVR uses a PNP Darlington input stage to achieve ultra-low input bias current (3.5 nA typ) and wide common-mode range (0 V to V_CC − 1.5 V), supporting ground-referenced sensing. Its open-collector NPN output enables wired-AND logic and flexible pull-up voltage selection up to 36 V.

It supports dual-supply operation if |V_CC − V_EE| stays within 2 V to 36 V and V_CC exceeds input common-mode voltage by ≥1.5 V. Supply current remains stable across 2 V–36 V and −40°C to +125°C, with ESD robustness rated at ±2 kV HBM.

Key Specifications

Pinout & Package

SOT-23-5 package (2.90 mm × 1.60 mm body size), surface-mount, moisture sensitivity level 1 (MSL-1), RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM333DR and TL331QDBVRQ1, TL331IDBVR offers the optimal balance of extended temperature capability, low offset, and industrial-grade reliability - making it preferred for server PSUs and factory automation where AEC-Q100 is unnecessary but 125°C operation is critical.

Availability

TL331IDBVR is available at Aetrix Electronics and suitable for server PSU monitoring, cordless power tool battery management, and building automation occupancy detection requiring stable component supply across long production lifecycles.

Supply support for TL331IDBVR 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 leadership in precision comparators and power management ICs.

The TL331 family was engineered for cost-sensitive industrial and consumer applications demanding wide supply range, low power, and robust ESD performance - targeting power conversion, motor control, and sensor interface systems.

FAQ

What is the maximum supply voltage rating for TL331IDBVR?

The TL331IDBVR has an absolute maximum supply voltage rating of 38 V, as specified in Section 5.2 of the official TI datasheet SLVS238L. This exceeds the 36 V recommended operating maximum and enables safe transient tolerance in 24 V and 36 V industrial systems. Operation above 36 V is not recommended for continuous use, but the 38 V rating provides margin against voltage spikes. The TL331IDBVR maintains full functionality across its 2 V to 36 V operating range.

Does TL331IDBVR support ground-referenced input signals?

Yes, TL331IDBVR supports ground-referenced inputs: its common-mode input voltage range explicitly includes ground (0 V) and extends up to V_CC − 1.5 V. This is confirmed in Section 5.8 (Electrical Characteristics) and Section 6.3 (Feature Description) of the datasheet. The PNP Darlington input architecture enables true ground-sensing capability, making TL331IDBVR suitable for zero-crossing detection, battery low-voltage alarms, and other applications where one input must sit at 0 V.

What is the output configuration of TL331IDBVR and how should it be used?

TL331IDBVR features an open-collector NPN output (pin 4), requiring an external pull-up resistor to define the logic-high voltage level. As stated in Section 4 (Pin Configuration) and Section 6.3, the output sinks current when IN− > IN+, and presents high impedance otherwise. Pull-up voltage may range from 2 V to 36 V, enabling level shifting between domains - for example, driving a 3.3 V MCU GPIO from a 24 V sensor rail. No internal pull-up is present.

How does TL331IDBVR differ from the older TL331I variant?

TL331IDBVR is the B-version improvement over TL331I: it offers lower input offset (±4 mV max vs. ±9 mV), lower supply current (430 µA vs. 700 µA), faster response (1 µs vs. 1.3 µs), extended temperature range (−40°C to +125°C vs. −40°C to +85°C), and doubled ESD rating (2 kV HBM vs. 1 kV). Per Section 3 (Description) and the Family Comparison Table, TL331IDBVR is a drop-in replacement - identical pinout, footprint, and basic functionality - with enhanced parametric performance.

Is TL331IDBVR suitable for dual-supply operation?

Yes, TL331IDBVR supports dual-supply operation provided the difference between V_CC and V_EE remains within 2 V to 36 V, and V_CC is at least 1.5 V more positive than the input common-mode voltage. This is explicitly defined in Section 3 (Description) and Section 6.1 (Overview). Unlike rail-to-rail op-amps, TL331IDBVR does not require symmetric supplies; it functions correctly with V_EE = −5 V and V_CC = +12 V, for instance, as long as the voltage constraints are met.