Texas Instruments SM72480SDX-105/NOPB

Overview

SM72480SDX-105/NOPB from Texas Instruments is a factory-preset, dual-output temperature switch and analog temperature sensor in a 2.2 mm × 2.5 mm WSON-6 package. It features a 105°C trip point, ±2.3°C VTEMP accuracy over −50°C to +150°C, 1.6V minimum supply voltage, 8 μA typical supply current, and push-pull + open-drain digital outputs - used for thermal protection in PV power optimizers and battery management systems.

For engineers reviewing the SM72480SDX-105/NOPB datasheet, SM72480SDX-105/NOPB pinout, SM72480SDX-105/NOPB application, or SM72480SDX-105/NOPB equivalent, this page delivers verified functional identity, validated pin roles, confirmed trip-point behavior, real-world thermal sensing accuracy, and precise alternative part comparisons - all grounded in TI's SNIS156C datasheet and official parametric data.

Technical Context

The SM72480SDX-105/NOPB integrates a precision NTC-based analog temperature sensor (VTEMP) with two synchronized digital overtemperature outputs: an active-high push-pull OVERTEMP and an active-low open-drain OVERTEMP. Its factory-trimmed 105°C trip point includes 4.5–5.5°C hysteresis to prevent output oscillation near threshold.

TRIP TEST input enables in-situ verification: asserting it high forces both digital outputs active and routes VTRIP (≈1590 mV at 105°C) to VTEMP, allowing system-level validation without thermal cycling. VTEMP provides ±100 μA drive capability and supports capacitive loads up to 1100 pF.

Key Specifications

Pinout & Package

SM72480SDX-105/NOPB uses the WSON-6 (SDB06A) package with exposed thermal pad (DAP). The DAP must be soldered to PCB thermal pad-connected to GND for optimal noise immunity and thermal coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM57BISD-5/NOPB and MAX6505UTP+T, SM72480SDX-105/NOPB uniquely combines factory-trimmed 105°C trip, dual digital outputs, high-accuracy analog VTEMP, and integrated testability - making it optimal for compact, high-reliability thermal monitoring where both alert and telemetry are required.

Availability

SM72480SDX-105/NOPB is available at Aetrix Electronics and suitable for PV power optimizers, battery management systems, and automotive ECUs requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for SM72480SDX-105/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, embedded processing, and power management technologies, with decades of expertise in precision sensing and industrial-grade reliability.

The SM72480 product line was designed specifically for renewable energy and high-reliability thermal monitoring applications - delivering factory-calibrated trip points, ultra-low power operation, and robust noise immunity in harsh environments.

FAQ

What is the exact factory-set temperature trip point for SM72480SDX-105/NOPB?

The SM72480SDX-105/NOPB has a factory-preset temperature trip point of 105°C, confirmed in TI's SNIS156C datasheet Section 1 (Features) and Electrical Characteristics table. This value is laser-trimmed during manufacturing and does not require external configuration. The hysteresis range is 4.5°C to 5.5°C, meaning the output resets when temperature falls to 99.5–100.5°C. This fixed trip point is distinct from other SM72480 variants (e.g., SM72480SDX-120/NOPB).

Does SM72480SDX-105/NOPB provide both digital and analog temperature outputs?

Yes, SM72480SDX-105/NOPB delivers dual functionality: two synchronized digital outputs (OVERTEMP push-pull active-high and OVERTEMP open-drain active-low) plus an analog VTEMP output with negative temperature coefficient (−7.7 mV/°C). VTEMP provides monotonic, linear voltage vs. die temperature across −50°C to +150°C, supporting direct ADC interfacing without external signal conditioning.

What is the purpose of the TRIP TEST pin on SM72480SDX-105/NOPB?

The TRIP TEST pin (Pin 1) is an active-high digital input that enables in-system functional verification. When pulled high, it forces both OVERTEMP outputs active regardless of actual temperature and routes the trip-reference voltage (VTRIP ≈1590 mV) to the VTEMP pin. This allows full electrical validation of downstream logic and ADC paths without thermal cycling - critical for production test and field diagnostics in SM72480SDX-105/NOPB deployments.

What package type and thermal characteristics apply to SM72480SDX-105/NOPB?

SM72480SDX-105/NOPB uses the WSON-6 package (TI package code SDB06A), measuring 2.2 mm × 2.5 mm with an exposed die attach pad (DAP). Its thermal resistance θJA is 152°C/W when mounted per JEDEC standards. For optimal performance, the DAP must be soldered to a PCB thermal pad connected to GND - improving noise immunity and reducing self-heating error to <0.06°C under typical load conditions.

How does SM72480SDX-105/NOPB handle supply voltage noise in demanding applications?

SM72480SDX-105/NOPB demonstrates exceptional supply-noise rejection: bench testing confirms zero false triggers under 3 Vpp square-wave noise injected on VDD across 2–5 V supply range, even when die temperature is within 0.5°C of the 105°C trip point. This immunity is achieved through internal filtering and rail-to-rail buffer design - making SM72480SDX-105/NOPB suitable for use in switching power supplies, motor drives, and other electrically noisy environments.