Texas Instruments LMV7231SQE/NOPB

Overview

LMV7231SQE/NOPB from Texas Instruments is a hex window comparator IC designed for precision power-rail supervision, featuring six independent 1.5% accurate window comparators with an internal 400-mV reference, 2.2 V to 5.5 V supply range, and open-drain outputs capable of voltage levels exceeding V+. It enables simultaneous monitoring of up to six DC power supplies in industrial control systems and battery-powered instrumentation.

For engineers reviewing the LMV7231SQE/NOPB datasheet, LMV7231SQE/NOPB pinout, LMV7231SQE/NOPB application, or LMV7231SQE/NOPB equivalent, key selection considerations include its ±1.5% threshold accuracy, input/output voltage tolerance beyond V+, COPOL/AOSEL programmable output polarity, and 24-pin WQFN package compatibility with high-density PCB layouts.

Technical Context

The LMV7231SQE/NOPB implements six identical window comparators, each comparing +INx and −INx against a shared 400-mV internal reference to detect overvoltage (OV) and undervoltage (UV) conditions. Thresholds are set externally via resistor dividers, with hysteresis fixed at 6 mV (typical) to prevent chatter near trip points.

Its functional architecture includes two configurable logic layers: COPOL selects active state polarity (HIGH/LOW) for individual CO1–CO6 outputs, while AOSEL determines whether the aggregated AO output signals OV or UV events across all channels. All inputs and outputs tolerate voltages up to 6 V independent of V+.

Key Specifications

Pinout & Package

LMV7231SQE/NOPB is housed in a 24-pin WQFN package (4.00 mm × 4.00 mm) with exposed thermal pad (DAP) requiring connection to GND for optimal thermal performance and EMI suppression.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TLV3701IPW and MAX96706GTJ+T, LMV7231SQE/NOPB uniquely delivers six channels, ±1.5% accuracy with embedded 400-mV reference, and true V+–independent I/O - making it the only solution enabling compact, high-reliability multi-rail supervision without external references or level shifters.

Availability

LMV7231SQE/NOPB is available at Aetrix Electronics and suitable for power supply monitoring, battery management, and industrial control systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for LMV7231SQE/NOPB 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 analog ICs and power management solutions.

The LMV7231SQE/NOPB belongs to TI's high-accuracy voltage supervisor product line, engineered specifically for robust, low-power, multi-rail power integrity monitoring in automotive, industrial, and portable electronics.

FAQ

What is the primary function of the LMV7231SQE/NOPB in a power management system?

The LMV7231SQE/NOPB serves as a hex window comparator that independently monitors up to six DC voltage rails for overvoltage and undervoltage conditions using an internal 400-mV reference. Its six COx outputs provide per-rail fault status, while the AO output aggregates all channel events into a single system-level alert signal - enabling rapid, hardware-based power integrity verification without software dependency.

How does the LMV7231SQE/NOPB achieve input voltage tolerance beyond its V+ supply?

The LMV7231SQE/NOPB uses supply-independent input stages that allow +INx and −INx pins to accept voltages up to 6 V regardless of V+ (2.2 V to 5.5 V). This architecture avoids crowbar diode conduction, eliminating unwanted current draw from monitored rails - a critical advantage in battery-sense applications where preserving charge is essential. The LMV7231SQE/NOPB maintains full functionality and specification compliance under these conditions.

Can the LMV7231SQE/NOPB outputs drive a 12-V relay directly?

Yes - the CO1–CO6 and AO outputs are open-drain NMOS structures rated for 6-V absolute maximum, and can be pulled up to 12 V externally. With 5-mA sink capability at 200 mV VOL (IL = 5 mA), the LMV7231SQE/NOPB can directly interface to relay driver circuits or optocouplers without additional level-shifting components, provided the external pull-up voltage remains within absolute maximum ratings.

What is the role of the COPOL and AOSEL pins on the LMV7231SQE/NOPB?

COPOL configures the logic polarity of CO1–CO6 outputs: when LOW, they assert active-low on out-of-window events; when HIGH, they assert active-low on in-window events. AOSEL selects the AO output trigger mode: LOW activates AO on overvoltage, HIGH on undervoltage. These pins allow the LMV7231SQE/NOPB to adapt to diverse host controller interrupt or reset signaling conventions without board redesign.

Does the LMV7231SQE/NOPB require external resistors to set detection thresholds?

Yes - each window comparator requires an external three-resistor divider (R1, R2, R3) connected to +INx and −INx to scale the monitored voltage to match the internal 400-mV reference. The LMV7231SQE/NOPB datasheet provides exact equations to calculate resistor values based on desired OV/UV thresholds and hysteresis behavior, ensuring design accuracy and repeatability across all six channels.