Texas Instruments LM26LVCISD-090/NOPB

Overview

LM26LVCISD-090/NOPB from Texas Instruments is a factory-preset, dual-output temperature monitoring IC with active-high push-pull and active-low open-drain overtemperature switch outputs plus a linear NTC analog VTEMP sensor output. It operates from 1.6 V to 5.5 V, features 5°C hysteresis, ±2.2°C trip point accuracy over 0°C–150°C, and is packaged in a 6-pin WSON (2.2 mm × 2.5 mm). It is used in battery management systems for thermal cutoff and real-time die temperature sensing.

For engineers reviewing the LM26LVCISD-090/NOPB datasheet, LM26LVCISD-090/NOPB pinout, LM26LVCISD-090/NOPB application, or LM26LVCISD-090/NOPB equivalent, key selection criteria include factory-trip point (90°C), low quiescent current (8 µA), dual digital output topology, VTEMP gain setting (Gain 4), and WSON-6 thermal pad layout requirements.

Technical Context

The LM26LVCISD-090/NOPB integrates a precision bandgap-based temperature sensor, a programmable reference DAC (VTRIP), and dual comparators driving independent OVERTEMP (push-pull, active-high) and OVERTEMP (open-drain, active-low) outputs. Trip point is fixed at 90°C during manufacturing and corresponds to Gain 4 VTEMP slope (−12.8 mV/°C).

Hysteresis is fixed at 5°C, ensuring stable switching without oscillation near TTRIP. The TRIP_TEST input enables in-system functional verification by forcing both digital outputs active and routing VTRIP to VTEMP - allowing host MCU validation of comparator and output stages without thermal stimulus.

Key Specifications

Pinout & Package

LM26LVCISD-090/NOPB is housed in a thermally enhanced 6-pin WSON package (2.2 mm × 2.5 mm) with an exposed thermal pad (DAP) that must be soldered to PCB ground for optimal thermal performance and noise immunity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar temperature switch and sensor applications.

Compared with LM26LVISD-090/NOPB, the LM26LVCISD-090/NOPB adds AEC-Q100 qualification for automotive use, while MAX6505UTA+T sacrifices analog output and dual outputs for smaller footprint - making LM26LVCISD-090/NOPB optimal where functional safety and diagnostics are required.

Availability

LM26LVCISD-090/NOPB is available at Aetrix Electronics and suitable for battery management systems, automotive cabin controllers, industrial motor drives, and medical infusion pumps requiring stable component supply across long product lifecycles.

Supply support for LM26LVCISD-090/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 company delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.

The LM26LV family was designed as a low-voltage, dual-output thermal monitor for space-constrained, battery-powered systems requiring both hardware-triggered shutdown and analog temperature telemetry - with factory-trip variants like LM26LVCISD-090/NOPB targeting automotive and industrial thermal safety applications.

FAQ

What is the factory-set trip temperature of the LM26LVCISD-090/NOPB?

The LM26LVCISD-090/NOPB has a factory-preset overtemperature trip point of exactly 90°C, with guaranteed accuracy of ±2.2°C across −50°C to +150°C ambient. This value is laser-trimmed during wafer sort and cannot be adjusted in the field. The corresponding VTEMP gain is set to −12.8 mV/°C (Gain 4), as defined in TI's SNIS144G datasheet Table 1.

How does the TRIP_TEST pin function on the LM26LVCISD-090/NOPB?

Driving TRIP_TEST high on the LM26LVCISD-090/NOPB forces both OVERTEMP and OVERTEMP outputs into their active states and routes the internal VTRIP reference voltage (corresponding to 90°C) to the VTEMP pin. This allows full hardware-level validation of comparator response and output driver functionality without thermal stimulus - critical for production test in battery packs and automotive modules.

Can the LM26LVCISD-090/NOPB operate from a 1.8-V supply?

Yes, the LM26LVCISD-090/NOPB operates reliably from 1.6 V to 5.5 V, including 1.8-V nominal supplies. At 1.8 V, it maintains full specification compliance: 8 µA quiescent current, ±2.2°C trip accuracy, and valid VTEMP output with ≤1 mV load regulation error. Its low-voltage capability makes it ideal for modern 1.8-V microcontroller subsystems without requiring additional voltage regulation.

What is the purpose of the thermal pad on the LM26LVCISD-090/NOPB WSON package?

The exposed thermal pad (DAP) on the LM26LVCISD-090/NOPB WSON-6 package must be soldered to a PCB copper pour connected to GND. This achieves optimal thermal conduction from die to board (RθJB = 70°C/W), improves noise immunity by lowering impedance to ground, and stabilizes VTEMP accuracy under self-heating conditions - especially critical in sealed enclosures or high-power-density layouts.

Does the LM26LVCISD-090/NOPB support latch-mode operation?

Yes, the LM26LVCISD-090/NOPB supports hardware latching: tying the OVERTEMP output to the TRIP_TEST input causes the device to remain latched in the overtemperature state after tripping. The latch clears only when TRIP_TEST is driven low or VDD is cycled. This enables fail-safe behavior in safety-critical systems such as medical pumps or automotive ECUs where persistent fault indication is required.