Texas Instruments TMP144YFFT

Overview

TMP144YFFT from Texas Instruments is a low-power, 12-bit digital temperature sensor with SMAART Wire™/UART interface in a 4-ball DSBGA (YFF) package. It delivers ±1°C accuracy from –10°C to +100°C, 0.0625°C resolution, and operates from 1.4 V to 3.6 V supply. Its daisy-chain capability supports up to 16 devices on one bus, making it ideal for multi-zone thermal monitoring in space-constrained mobile electronics.

For engineers reviewing the TMP144YFFT datasheet, TMP144YFFT pinout, TMP144YFFT application, or TMP144YFFT equivalent, key selection criteria include its ultra-low 3-μA active current at 0.25 Hz conversion rate, push-pull TX output, MDA (Multiple Device Access) command support, and YFF package's 0.76 mm × 0.96 mm footprint with 625-µm max height.

Technical Context

The TMP144YFFT implements a proprietary SMAART Wire™ interface - UART-compatible, single-wire half-duplex protocol using dedicated RX (input) and TX (push-pull output) pins. It supports daisy-chain topology with automatic address assignment and global MDA commands for simultaneous read/write across up to 16 devices.

Internally, it integrates a thermal BJT sensor, 12-bit ADC, register bank, and configurable functional modes including Continuous Conversion (CR[1:0]-programmable period), One-Shot (26 ms typical conversion), Shutdown (0.6 μA), and Extended Temperature Mode (13-bit output, up to 255.9°C range).

Key Specifications

Pinout & Package

Package: 4-ball DSBGA (YFF), 0.76 mm × 0.96 mm, maximum height 625 µm - optimized for placement under heat-dissipating components to improve thermal response and accuracy.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX31875Y+T and STTS751-2DFW3F, the TMP144YFFT uniquely combines daisy-chain scalability, MDA efficiency, and sub-microwatt shutdown - making it the only option supporting 16-node thermal mapping with <10 μA total bus quiescent current.

Availability

TMP144YFFT is available at Aetrix Electronics and suitable for smartphone thermal management, LED backlight compensation, and enterprise server DIMM monitoring requiring stable component supply across high-volume production cycles.

Supply support for TMP144YFFT 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, serving industrial, automotive, and consumer markets with high-reliability silicon solutions.

The TMP144 product line delivers ultra-compact, ultra-low-power digital temperature sensing for thermally dense systems - designed specifically to replace discrete NTC thermistors and legacy I²C sensors in space- and power-constrained mobile and computing platforms.

FAQ

What is the package type and dimensions of the TMP144YFFT?

The TMP144YFFT uses a 4-ball wafer chip-scale package (DSBGA) with YFF designation. Its nominal footprint is 0.76 mm × 0.96 mm, and maximum height is 625 µm. This ultra-thin profile allows placement under heat-dissipating components to improve thermal coupling and response time - a key design advantage confirmed in TI's SBOS891C datasheet Figure 5-1 and Table 5-1.

Does the TMP144YFFT support daisy-chaining, and how many devices can be connected?

Yes, the TMP144YFFT supports daisy-chain configuration using its SMAART Wire™/UART interface. Up to 16 TMP144YFFT devices can be serially connected on a single bus with two wires (RX and TX), as explicitly stated in the device description and illustrated in the simplified application diagram of the SBOS891C datasheet. Each device auto-assigns a unique address during initialization.

What is the temperature accuracy specification for the TMP144YFFT across its operating range?

The TMP144YFFT has ±1.0°C maximum accuracy over –10°C to +100°C and ±2.0°C maximum over its full –40°C to +125°C operating range, per Section 6.5 Electrical Characteristics in the SBOS891C datasheet. Accuracy is specified at V+ = 1.4 V to 3.6 V and includes effects of self-heating per footnote (1). The YFF package exhibits typical error of ±0.5°C in the mid-range, as shown in Figure 6-5.

How does the Multiple Device Access (MDA) feature work in the TMP144YFFT?

The MDA feature in the TMP144YFFT allows the host to issue global read/write commands that all connected TMP144YFFT devices respond to simultaneously - eliminating individual addressing overhead. Supported commands include global software reset, global initialization, global clear interrupt, and global read/write. This reduces bus traffic significantly, especially in systems with >8 sensors, and is detailed in Sections 7.3.1 and Table 7-2 of the SBOS891C datasheet.

What are the power consumption modes of the TMP144YFFT, and what current levels do they draw?

The TMP144YFFT offers four operational modes: Active Conversion (44–100 μA typical), Average (3–10 μA at default 4-s period), Standby (2.5–9.5 μA), and Shutdown (0.6–5 μA). These values are measured at V+ = 3.3 V and TA = 25°C, per Section 6.5 of SBOS891C. The 0.6 μA shutdown current enables multi-year battery life in intermittently sampled applications like medical wearables.