Texas Instruments TMP141AIDBVT

Overview

TMP141AIDBVT from Texas Instruments is a digital temperature sensor with single-wire SensorPath interface, 10-bit resolution (0.25°C), ±2°C accuracy over −25°C to +85°C and ±3°C over −40°C to +125°C, operating from 2.7V to 5.5V, and housed in SOT23-6 package - used for hardware health monitoring in motherboards and video cards.

For engineers reviewing the TMP141AIDBVT datasheet, TMP141AIDBVT pinout, TMP141AIDBVT application, or TMP141AIDBVT equivalent, this page delivers verified electrical specs, validated SensorPath timing behavior, confirmed address configuration logic (ADD0/ADD1), real-world thermal error vs. supply variation (±0.5°C/V), and precise conversion time settings (162–218 ms default) - all specific to the TMP141AIDBVT SOT23-6 variant.

Technical Context

The TMP141AIDBVT implements a diode-based on-die temperature sensing element interfaced to a ΔΣ A/D converter, controlled by internal oscillator and serial interface logic. It uses pulse-width encoded signaling on the open-drain SWD line with five defined signal types (Start, Data 0/1, Attention Request, Reset), requiring a 1.25kΩ pull-up resistor and supporting up to four devices per bus.

Addressing is determined by ADD0 and ADD1 pin states at power-up, mapping to device numbers 1–4 (00→1, 01→2, 10→3, 11→4); register access follows SensorPath protocol with 8-bit or 16-bit reads/writes, even parity, and ACK bit validation. Conversion is initiated via Device Control Register (bit 4 ENAB and bit 1 EN_S), with configurable rate (default 190 ms) and low-power mode support.

Key Specifications

Pinout & Package

SOT23-6 package (DBV) with 2.9 mm × 1.6 mm body, 1.15 mm height, and gull-wing leads. Thermal resistance θ_JA = 200°C/W. Requires 0.1 µF bypass capacitor on V+.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM75BIMM/NOPB and MAX31820MUA+, the TMP141AIDBVT offers optimal balance of single-wire simplicity, industrial-grade accuracy, and ultra-low quiescent current - making it uniquely suited for cost-sensitive, space-constrained, and always-on thermal monitoring in networking and computing hardware.

Availability

TMP141AIDBVT is available at Aetrix Electronics and suitable for motherboard thermal management, video card hot-spot sensing, and telecom base station chassis monitoring requiring stable component supply across long production lifecycles.

Supply support for TMP141AIDBVT 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 focused on analog, embedded processing, and connectivity technologies, with over 90 years of innovation in precision analog ICs.

The TMP141AIDBVT belongs to TI's SensorPath temperature sensor family, designed specifically for hardware health monitoring in space-constrained, low-power, multi-node systems such as servers, routers, and base stations - emphasizing bus efficiency, configurability, and ruggedness.

FAQ

What is the exact package type and footprint of the TMP141AIDBVT?

The TMP141AIDBVT uses the SOT23-6 (DBV) package: 2.9 mm × 1.6 mm × 1.15 mm body with gull-wing leads, 0.95 mm lead pitch, and dual GND pins. Its JEDEC MO-178AC outline is documented in TI's SBAS347A datasheet Figure 1. This compact footprint enables placement directly adjacent to heat sources like VRMs or GPUs without consuming valuable PCB area - a key advantage over larger MSOP-8 variants.

How does the TMP141AIDBVT achieve ±2°C accuracy without external calibration?

The TMP141AIDBVT achieves ±2°C accuracy from −25°C to +85°C through factory-trimmed on-die diode characterization and integrated ΔΣ A/D conversion, with built-in compensation for supply voltage variation (±0.5°C/V). No external components or user calibration are required - the sensor reports fully compensated 10-bit temperature data (0.25°C LSB) directly via SensorPath, eliminating drift sources associated with discrete thermistor networks.

Can multiple TMP141AIDBVT sensors share the same SWD line, and how are they addressed?

Yes - up to four TMP141AIDBVT sensors can operate on a single SWD bus. Each device is assigned a unique address (1–4) based on its ADD0 and ADD1 pin states at power-up (00→1, 01→2, 10→3, 11→4). The master sends the target device number before register access; broadcast writes (device 0) are supported only for Device Control Register updates - enabling scalable, low-pin-count thermal monitoring.

What is the minimum pull-up resistor value required for reliable TMP141AIDBVT SensorPath operation?

The TMP141AIDBVT requires a 1.25 kΩ ±30% pull-up resistor on the SWD line, as specified in its electrical characteristics table for valid rise/fall times (tr ≤ 1000 ns, tf ≤ 300 ns) and bus timing compliance. Using values outside this range - e.g., 4.7 kΩ - causes excessive rise time and violates tRST, tMtr0, and tSLout1 timing margins, leading to communication failures or missed Attention Requests.

Does the TMP141AIDBVT support automatic temperature conversion triggering, or must it be software-initiated?

The TMP141AIDBVT requires explicit software initiation: both the ENAB bit (register 5, bit 4) and EN_S bit (register A, bit 1) must be set to '1' to start conversion. There is no autonomous or timer-based conversion mode. Once enabled, conversion completes in 162–218 ms (default), sets SF1 flag in Status Register (4), and - if AT_E is enabled - asserts an Attention Request to notify the master.