Texas Instruments TMP103FYFFT

Overview

TMP103FYFFT from Texas Instruments is a low-power, digital temperature sensor IC in a 4-ball DSBGA (WCSP) package, featuring I²C/SMBus-compatible two-wire interface, ±1°C typical accuracy over –10°C to 100°C, 1°C resolution, and 3-μA active quiescent current at 0.25 Hz conversion rate - used for thermal monitoring in space-constrained mobile and storage devices.

For engineers reviewing the TMP103FYFFT datasheet, TMP103FYFFT pinout, TMP103FYFFT application, or TMP103FYFFT equivalent, this page delivers verified electrical specs, MDA-enabled multi-device bus architecture, shutdown/one-shot/continuous conversion modes, thermal error vs. temperature behavior, and real-world integration guidance for SSDs, notebooks, and telecom equipment.

Technical Context

The TMP103FYFFT implements a monolithic diode-based temperature sensing element with on-chip 8-bit ADC and digital control logic, supporting three functional modes: shutdown (≤1 μA), one-shot (26 ms conversion, auto-return), and continuous (0.25–8 Hz via CR1/CR0 bits). Its serial interface includes integrated Schmitt triggers and spike suppression on SDA/SCL.

It supports Multiple Device Access (MDA) commands enabling global read/write to up to eight parallel TMP103 units using unique slave addresses (e.g., TMP103A = 0x70, TMP103F = 0x75), eliminating per-device addressing overhead - critical for thermal zone management in multi-core SoC platforms and high-density server DIMMs.

Key Specifications

Pinout & Package

Package: 4-ball DSBGA (YFF), 0.76 mm × 0.76 mm, 0.35 mm height - ultra-compact footprint for PCB area-constrained modules such as M.2 SSDs and wearable sensor nodes.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMP103FYFFT, TMP112DBVR trades MDA capability and ultra-low power for tighter accuracy in single-point use cases, while LM75BIMM/NOPB offers pin compatibility with legacy designs but lacks modern power and integration features essential for compact, multi-zone systems.

Availability

TMP103FYFFT is available at Aetrix Electronics and suitable for notebooks, SSDs, and telecom baseband units requiring stable component supply, long-term lifecycle assurance, and traceable wafer-lot sourcing.

Supply support for TMP103FYFFT 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 U.S.-based semiconductor company specializing in analog, embedded processing, and sensing technologies, with leadership in precision analog signal chains and low-power interface solutions.

The TMP103 product line delivers ultra-small, low-quiescent-current digital temperature sensors for thermal management in space- and power-constrained electronics - targeting mobile, storage, and infrastructure applications demanding high integration density.

FAQ

What is the package type and ball pitch of the TMP103FYFFT?

The TMP103FYFFT uses a 4-ball DSBGA (Wafer Chip-Scale Package) with nominal body size 0.76 mm × 0.76 mm and ball pitch of 0.35 mm. This YFF package enables direct mounting on high-density PCBs such as M.2 SSD modules and smartphone mainboards. The TMP103FYFFT's ultra-compact footprint supports thermal sensor placement adjacent to heat sources without consuming valuable routing layers.

Does the TMP103FYFFT support multiple devices on the same I²C bus, and how many?

Yes, the TMP103FYFFT supports Multiple Device Access (MDA), allowing up to eight units on a single two-wire bus. Each variant (e.g., TMP103A–TMP103H) has a unique slave address (0x70–0x77), enabling global read/write commands that eliminate sequential addressing. This feature is implemented in the TMP103FYFFT's hardware interface logic and requires no additional firmware overhead - ideal for thermal zone monitoring in multi-DIMM servers or multi-core SoCs.

What are the power consumption modes of the TMP103FYFFT, and what is its lowest current draw?

The TMP103FYFFT operates in three modes: shutdown (≤1 μA), one-shot (26 ms active, then auto-return), and continuous conversion (0.25–8 Hz). Its lowest current draw is 0.5–1 μA in shutdown mode at 1.8 V, verified across –40°C to 125°C. This value is measured with serial bus inactive and applies directly to the TMP103FYFFT - enabling years of operation on coin-cell batteries in wireless sensor nodes.

Can the TMP103FYFFT be used for thermal watchdog functions, and how is it configured?

Yes, the TMP103FYFFT includes a hardware temperature watchdog with programmable THIGH and TLOW registers. When the measured temperature exceeds THIGH or falls below TLOW, the FH or FL flag bit in the configuration register is set. These flags can trigger interrupt signals or be polled by the host. Configuration is done via I²C writes to the TMP103FYFFT's register map - no external components required. Latch mode (LC bit) retains flag state until explicitly cleared.

Is the TMP103FYFFT compatible with both I²C and SMBus protocols, and what speed modes does it support?

Yes, the TMP103FYFFT is fully compatible with standard-mode (100 kHz), fast-mode (400 kHz), and high-speed-mode (up to 3.4 MHz) I²C, as well as SMBus 2.0 specifications. Its SDA and SCL pins include integrated Schmitt triggers and noise filters, ensuring robust communication in electrically noisy environments. All timing parameters for these modes - including tLOW, tHIGH, and tBUF - are specified in the TMP103FYFFT datasheet and validated across voltage and temperature ranges.