Texas Instruments TMP104YFFR

Overview

TMP104YFFR from Texas Instruments is a low-power, digital temperature sensor in a 4-ball wafer chip-scale package (DSBGA), featuring SMAART Wire™ interface for daisy-chain configuration of up to 16 devices. It delivers ±0.5°C typical accuracy from –10°C to +100°C, 1°C resolution, and operates from 1.4 V to 3.6 V supply, enabling precise thermal monitoring in space-constrained mobile handsets and notebooks.

For engineers reviewing the TMP104YFFR datasheet, TMP104YFFR pinout, TMP104YFFR application, or TMP104YFFR equivalent, key selection considerations include its 2-pin serial interface with push-pull TX and high-impedance RX, global read/write command support, 26 ms typical conversion time, and shutdown current of 1 μA - all critical for ultra-low-power multi-zone thermal management designs.

Technical Context

The TMP104YFFR implements a proprietary SMAART Wire™ interface requiring only two pins (RX/TX) and supporting both transparent daisy-chain operation and individually addressable communication after global initialization. Its internal architecture includes an on-die temperature-sensing element, 8-bit read-only temperature register, and configurable 8-bit configuration register controlling conversion rate (0.25–8 Hz), shutdown/one-shot/continuous modes, and temperature window alert logic.

It features built-in 28-ms bus timeout recovery, baud-rate calibration via 0x55 start byte, and MDA (Multiple Device Access) commands enabling simultaneous register reads/writes across all daisy-chained devices - eliminating per-device polling overhead and reducing host software complexity in multi-sensor systems.

Key Specifications

Pinout & Package

Package: YFF (DSBGA-4), 0.8 mm × 1.0 mm (±5%), 4-ball wafer chip-scale package with bottom-side solder bumps for minimal footprint and low thermal resistance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX31875Y+T and STTS751-2DMR, the TMP104YFFR uniquely combines ultra-small 0.8 × 1.0 mm DSBGA packaging, true hardware daisy-chain scalability to 16 nodes, and sub-μA shutdown current - making it optimal for size- and power-constrained multi-zone thermal architectures where bus simplicity outweighs marginal resolution gains.

Availability

TMP104YFFR is available at Aetrix Electronics and suitable for smartphone thermal management, notebook CPU/GPU zone sensing, and industrial edge controller thermal profiling requiring stable component supply and long-term lifecycle support.

Supply support for TMP104YFFR 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, with leadership in precision analog, power management, and signal chain technologies.

The TMP104YFFR belongs to TI's precision temperature sensor product line, engineered specifically for ultra-low-power, space-constrained thermal monitoring in portable and embedded systems using simplified 2-pin serial interfaces.

FAQ

What is the pin configuration and package type of the TMP104YFFR?

The TMP104YFFR uses a YFF (DSBGA-4) 4-ball wafer chip-scale package measuring 0.8 mm × 1.0 mm. Its four terminals are: A1 = V+, A2 = GND, B1 = TX (push-pull output), and B2 = RX (high-impedance input). This layout enables minimal PCB footprint and direct thermal coupling to the PCB substrate - critical for accurate surface temperature measurement in the TMP104YFFR.

Does the TMP104YFFR support daisy-chain configuration, and how many devices can be connected?

Yes, the TMP104YFFR supports hardware daisy-chain configuration using its SMAART Wire™ interface. Up to 16 TMP104YFFR devices can be connected in series on a single 2-wire bus (RX/TX), with the first device receiving commands from the host and the last returning data. Global commands allow simultaneous register access across all devices, significantly reducing communication overhead compared to individual addressing - a core capability of the TMP104YFFR.

What is the accuracy and resolution of the TMP104YFFR over its operating temperature range?

The TMP104YFFR provides ±0.5°C typical accuracy from –10°C to +100°C and ±1°C typical accuracy from –40°C to +125°C, with 1°C resolution (8-bit output). Its temperature data format uses twos complement for negative values, and one LSB equals exactly 1°C - enabling straightforward interpretation in firmware without scaling. This specification is validated across the full –40°C to +125°C operating range specified for the TMP104YFFR.

How does the TMP104YFFR achieve ultra-low power consumption, and what are its current ratings?

The TMP104YFFR achieves ultra-low power via multiple modes: 3 μA typical active current at 0.25 Hz conversion rate, 1 μA typical shutdown current, and <0.5 μA in shutdown mode. In One-Shot mode, it performs a single 26-ms conversion then auto-returns to shutdown - ideal for intermittent monitoring. These values are measured at V+ = 1.8 V and TA = +25°C, and define the power envelope that makes the TMP104YFFR suitable for battery-powered applications.

What interface protocol does the TMP104YFFR use, and is it compatible with standard UART or I²C peripherals?

The TMP104YFFR uses Texas Instruments' proprietary SMAART Wire™ interface - a 2-pin, half-duplex, UART-style protocol with automatic baud-rate calibration (using 0x55 start byte). It is not electrically or logically compatible with standard I²C or UART peripherals. Host MCUs require firmware implementation of the SMAART Wire™ timing and command structure, including 28-ms timeout handling and daisy-chain address initialization - a defining characteristic of the TMP104YFFR's system integration.