Texas Instruments TMP144YMTT

Overview

TMP144YMTT from Texas Instruments is a low-power, 12-bit digital temperature sensor with SMAART Wire™/UART interface in a 4-ball, 0.76 mm × 0.96 mm DSBGA package (YMT variant, 150 µm max height). 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. Designed for space-constrained thermal monitoring in mobile devices, it supports daisy-chain configurations of up to 16 units with Multiple Device Access (MDA) commands.

For engineers reviewing the TMP144YMTT datasheet, TMP144YMTT pinout, TMP144YMTT application, or TMP144YMTT equivalent, key selection considerations include its ultra-thin YMT package for under-heat-sink placement, 3-μA active quiescent current at 0.25 Hz conversion rate, push-pull TX output, and global command support for multi-sensor bus efficiency.

Technical Context

The TMP144YMTT 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 both daisy-chain topology (serial loop with up to 16 devices) and transparent mode where input propagates directly to next device.

Its functional architecture includes MDA command execution (global read/write), programmable conversion rates (0.125 s to 4 s), extended temperature mode (13-bit output, up to 255.9°C), and interrupt-driven alerting via bus hold-low. Thermal sensing uses on-die BJT circuitry with dominant top-side thermal path enabled by the 150-µm YMT package's low height and metal bumps.

Key Specifications

Pinout & Package

The TMP144YMTT is housed in a 4-ball, wafer-level chip-scale package (DSBGA) with 0.76 mm × 0.96 mm footprint and maximum 150 µm height (YMT variant). This ultra-thin profile allows placement beneath heat-dissipating components for improved thermal response and measurement fidelity.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX31875Y+T and STTS22HTR, the TMP144YMTT uniquely combines daisy-chain scalability, MDA command efficiency, and 150-µm YMT packaging - making it optimal for space- and power-constrained multi-sensor thermal architectures where bus pin count and thermal response time are critical.

Availability

TMP144YMTT is available at Aetrix Electronics and suitable for smartphone thermal management, LED backlight compensation, enterprise server DIMM monitoring, medical wearable sensing, and HDTV thermal profiling requiring stable component supply and long-term lifecycle support.

Supply support for TMP144YMTT 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 connectivity technologies with over 90 years of innovation in precision sensing and low-power design.

The TMP144 product line was developed specifically for ultra-compact, multi-node thermal monitoring in mobile and computing platforms - emphasizing minimal PCB area, sub-1-μA shutdown current, and intelligent bus protocols for scalable sensor networks.

FAQ

What is the package type and dimensions of the TMP144YMTT?

The TMP144YMTT uses a 4-ball, wafer-level chip-scale package (DSBGA) designated YMT, with nominal dimensions of 0.76 mm × 0.96 mm and a maximum height of 150 µm. This ultra-thin profile is 40% thinner than a standard 0201 resistor and enables placement beneath heat-dissipating components for improved thermal coupling and faster response. The YMT variant is explicitly specified for the TMP144YMTT orderable part number.

Does the TMP144YMTT support daisy-chain configuration, and how many devices can be connected?

Yes, the TMP144YMTT supports daisy-chain topology using its SMAART Wire™/UART interface, allowing up to 16 devices to be connected serially on a single two-wire bus (RX/TX). Each device auto-assigns a unique address during initialization, and the host communicates with the first device, which relays data through the chain. The TMP144YMTT also supports Multiple Device Access (MDA) commands to broadcast reads/writes to all units simultaneously - a capability confirmed in the SBOS891C datasheet revision C.

What is the temperature accuracy and operating range of the TMP144YMTT?

The TMP144YMTT provides ±1.0°C maximum accuracy over the –10°C to +100°C range and ±2.0°C maximum over its full operating range of –40°C to +125°C. These specifications are guaranteed across the recommended supply voltage range (1.4 V to 3.6 V) and are validated per the SBOS891C production data sheet. Accuracy includes effects of self-heating and is measured with the device mounted per JEDEC standards.

How does the TMP144YMTT achieve ultra-low power consumption?

The TMP144YMTT achieves ultra-low power via three key mechanisms: (1) 3 μA typical active quiescent current at 0.25 Hz conversion rate, (2) 0.6 μA shutdown current with full interface retention, and (3) programmable conversion periods (0.125 s to 4 s) that let designers match update frequency to thermal dynamics. Its SMAART Wire™ interface requires no external pull-ups, and the YMT package's low thermal resistance minimizes self-heating-induced current drift - all confirmed in Section 6.5 of the TMP144YMTT datasheet.

Can the TMP144YMTT generate hardware interrupts, and how is it implemented?

Yes, the TMP144YMTT supports hardware interrupt functionality via bus hold-low assertion. When enabled (INT_EN = 1), and a temperature violation occurs (exceeding THIGH or falling below TLOW), the device disconnects the chain and pulls the TX line low until cleared by a Global Interrupt Clear or Software Reset command. This interrupt is latched independently of the LC (latch control) bit and works in both transparent and latch modes - a behavior fully documented in Section 7.4.6 of the SBOS891C datasheet for the TMP144YMTT.