Texas Instruments TMP108AIYFFT

Overview

TMP108AIYFFT from Texas Instruments is a low-power digital temperature sensor IC with SMBus/two-wire serial interface, ±0.75°C accuracy from –20°C to +85°C, 12-bit resolution (0.0625°C), 6-μA max quiescent current, and 1.4 V to 3.6 V supply range - deployed for thermal management in smartphones, battery packs, and environmental monitoring systems.

For engineers reviewing the TMP108AIYFFT datasheet, TMP108AIYFFT pinout, TMP108AIYFFT application, or TMP108AIYFFT equivalent, this page delivers verified technical context, package mapping, functional pin roles, real-world use scenarios, and validated alternative options - all grounded in TI's SBOS663A production data sheet.

Technical Context

The TMP108AIYFFT operates as a two-wire/SMBus slave device with dynamically programmable high/low temperature alert thresholds (T_HIGH/T_LOW registers), enabling autonomous over/under-temperature detection without host polling. Its internal 12-bit ADC digitizes die temperature with 0.0625°C LSB resolution and supports one-shot, continuous, or shutdown modes via configuration register bits M1/M0 and CR1/CR0.

It features integrated spike-suppression filters and Schmitt triggers on SDA/SCL, supports fast-mode (up to 400 kHz) and high-speed mode (up to 3.4 MHz), and implements SMBus alert response with address arbitration. The ALERT pin functions as an open-drain interrupt output tied to configurable temperature window violations.

Key Specifications

Pinout & Package

Package: 1.2-mm × 0.8-mm, 6-ball DSBGA (YFF). Ultra-compact wafer-level chip-scale packaging optimized for space-constrained PCB layouts and direct thermal coupling to board substrate.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TMP108AIYFFT, TMP117MRTJT trades ultra-low power and alert autonomy for metrology-grade accuracy and wider voltage range, while LM75BIMMX/NOPB offers simpler implementation at the expense of configurability and precision - making TMP108AIYFFT optimal for responsive, battery-aware thermal protection with minimal host overhead.

Availability

TMP108AIYFFT is available at Aetrix Electronics and suitable for smartphone thermal management, battery pack monitoring, and environmental HVAC sensing requiring stable component supply across production lifecycles.

Supply support for TMP108AIYFFT 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, energy efficiency, and system-level innovation.

The TMP108AIYFFT belongs to TI's precision analog temperature sensor product line - engineered specifically for autonomous thermal protection and management in space-constrained, power-sensitive consumer and industrial electronics.

FAQ

What is the operating temperature range of the TMP108AIYFFT?

The TMP108AIYFFT is specified from –40°C to +125°C, with accuracy of ±1°C maximum across that full range. Its design targets thermal monitoring in demanding environments including automotive cabin modules, industrial edge controllers, and high-performance computing subsystems where extended temperature operation is critical. The TMP108AIYFFT achieves this range through calibrated on-die sensing and robust process design.

Does the TMP108AIYFFT support multiple devices on the same I²C bus?

Yes, the TMP108AIYFFT supports up to four devices on a single two-wire or SMBus interface using its A0 address pin. A0 can be tied to GND, V+, SDA, or SCL to select one of four unique 7-bit slave addresses (1001000–1001011). This capability enables compact multi-zone thermal monitoring without additional bus controllers or level shifters - a key advantage of the TMP108AIYFFT in space-constrained designs.

How does the ALERT pin function on the TMP108AIYFFT?

The ALERT pin on the TMP108AIYFFT is an open-drain output that asserts low when the measured temperature exceeds the programmed T_HIGH threshold or falls below T_LOW. It supports both simple interrupt signaling and full SMBus alert protocol, allowing the host to identify which TMP108AIYFFT triggered the condition on a multi-device bus. The internal pullup resistor (80–120 kΩ) ensures defined idle state without external components.

What is the resolution and conversion time of the TMP108AIYFFT?

The TMP108AIYFFT provides 12-bit temperature resolution corresponding to 0.0625°C per LSB. In default continuous mode (CR1=1, CR0=0), it performs conversions every 250 ms. One-shot mode completes a measurement in 21–33 ms (typical 27 ms), and the device returns to shutdown afterward - making the TMP108AIYFFT highly adaptable to both responsive and ultra-low-power thermal sampling requirements.

Is the TMP108AIYFFT pin-compatible with other TI temperature sensors like the TMP102?

No, the TMP108AIYFFT is not pin-compatible with the TMP102 or other TI temperature sensors. It uses a 6-ball DSBGA (YFF) package with unique pin assignment (V+, GND, A0, SCL, SDA, ALERT), whereas TMP102 uses a 6-pin SOT-23 or DSBGA with different pinout and no dedicated ALERT output. Substituting the TMP108AIYFFT requires PCB layout revision - its value lies in autonomous alerting and ultra-low quiescent current, not mechanical interchangeability.