Texas Instruments TMP103CYFFR

Overview

TMP103CYFFR from Texas Instruments is a low-power, digital temperature sensor in a 4-ball DSBGA (WCSP) package, designed for precise thermal monitoring in space-constrained systems. It delivers ±1°C typical accuracy from –10°C to 100°C, 8-bit resolution, I²C/SMBus-compatible two-wire interface, and supports Multiple Device Access (MDA) for up to eight sensors on one bus - enabling efficient multi-zone thermal management in SSDs and mobile handsets.

For engineers reviewing the TMP103CYFFR datasheet, TMP103CYFFR pinout, TMP103CYFFR application, or TMP103CYFFR equivalent, key selection considerations include its 1.4 V–3.6 V supply range, 3 μA active quiescent current at 0.25 Hz, 26 ms conversion time, shutdown mode consuming ≤1 μA, and MDA-enabled global read/write capability across parallel sensor arrays.

Technical Context

The TMP103CYFFR implements an on-die diode-based temperature sensing element with successive-approximation ADC, integrated oscillator, and configurable register map including THIGH/TLOW limit registers and Configuration Register (CR1/CR0/M1/M0). Its serial interface supports Fast Mode (≤400 kHz) and High-Speed Mode (≤3.4 MHz), with built-in Schmitt triggers and spike suppression on SDA/SCL.

It operates in three functional modes: Shutdown (M1=M0=0), One-Shot (M1=0,M0=1), and Continuous Conversion (M1=1), with conversion rates selectable via CR1/CR0 bits (0.25/1/4/8 Hz). The device uses chip temperature as the measurement source, requiring thermal isolation from ambient air for surface-temperature applications.

Key Specifications

Pinout & Package

Package: 4-ball DSBGA (YFF), 0.76 mm × 0.76 mm, 0.35 mm pitch, bottom-side solderable.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM75BIMM/NOPB and STTS751DTYQTR, the TMP103CYFFR uniquely combines sub-1-mm² WCSP packaging, MDA-enabled bus efficiency, and sub-1-μA shutdown current - making it the optimal choice for compact, multi-zone, battery-sensitive thermal architectures where sensor count scales beyond two.

Availability

TMP103CYFFR is available at Aetrix Electronics and suitable for SSD thermal management, mobile handset battery monitoring, notebook CPU/GPU zone sensing, telecom baseband module thermal profiling, and low-power environmental sensors requiring stable component supply across production lifecycles.

Supply support for TMP103CYFFR 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 specializing in analog and embedded processing technologies, with leadership in precision sensing, power management, and signal chain solutions.

The TMP103 product line was engineered for ultra-compact, ultra-low-power thermal monitoring in portable and space-constrained electronics - targeting applications where traditional TO-92 or SOIC temperature sensors impose unacceptable size or power penalties.

FAQ

What is the package type and dimensions of the TMP103CYFFR?

The TMP103CYFFR uses a 4-ball DSBGA (Wafer Chip-Scale Package) with YFF designation, measuring 0.76 mm × 0.76 mm and 0.35 mm ball pitch. This ultra-small footprint enables placement directly adjacent to heat sources like SSD controllers or battery connectors without consuming valuable PCB area - critical for modern slim-profile consumer electronics where every 0.1 mm² matters.

Does the TMP103CYFFR support I²C Fast Mode Plus (1 MHz)?

No, the TMP103CYFFR supports I²C Fast Mode (≤400 kHz) and High-Speed Mode (≤3.4 MHz), but not Fast Mode Plus (1 MHz). Its timing specifications confirm maximum SCL frequency of 3.4 MHz only when V+ > 1.7 V, with stricter rise/fall time limits (tR/tF ≤160 ns) in that mode. For 1 MHz operation, designers must verify timing margins against Figure 1 and Table 6-6, as TI does not guarantee compliance at that rate.

How many TMP103CYFFR devices can share one I²C bus?

Up to eight TMP103CYFFR devices can operate on a single I²C bus using their unique slave addresses (1110000 to 1110111). This is enabled by the Multiple Device Access (MDA) feature, which allows global read/write commands - eliminating individual addressing overhead. Each unit must have distinct A0/A1/A2 pin configurations (hardwired via package variant), and all require properly sized pullup resistors on SDA/SCL.

What is the thermal measurement principle used in the TMP103CYFFR?

The TMP103CYFFR measures the silicon die temperature directly using an on-chip diode-based sensor and successive-approximation ADC. Thermal conduction occurs primarily through the metal bumps connecting the die to the PCB, not through ambient air. Therefore, for accurate surface or ambient temperature readings, the package must be thermally isolated from the PCB using minimal copper pour and non-conductive adhesives - otherwise measurements reflect board temperature, not target environment.

Can the TMP103CYFFR operate from a 1.2 V supply?

No, the TMP103CYFFR has a specified minimum supply voltage of 1.4 V per Section 6.3 of the datasheet. Operation below 1.4 V is outside recommended conditions and may result in undefined behavior, failed conversions, or communication errors on the I²C bus. For 1.2 V systems, designers should select alternative sensors such as the TMP117 (1.8 V min) or implement a dedicated 1.4 V LDO rail.