Texas Instruments TMP107BID

Overview

TMP107BID from Texas Instruments is a high-accuracy digital temperature sensor with bidirectional UART-compatible SMAART wire™ interface, 14-bit resolution (0.015625°C), ±0.4°C max accuracy from –20°C to +70°C, and dual open-drain ALERT outputs for independent over/undertemperature monitoring - deployed in distributed thermal sensing for server racks and HVAC control systems.

For engineers reviewing the TMP107BID datasheet, TMP107BID pinout, TMP107BID application, or TMP107BID equivalent, this page delivers verified electrical specs, daisy-chain timing constraints, EEPROM-programmable trip limits, SOIC-8 package layout guidance, and real-world thermal monitoring use cases - all grounded in TI's SBOS716D production data sheet.

Technical Context

The TMP107BID implements a silicon-based temperature sensor core with 14-bit ADC, two independently configurable ALERT outputs (ALERT1/ALERT2), and on-chip EEPROM storing unique 5-bit device addresses, trip thresholds, and general-purpose data. It operates in three functional modes: therm (transparent comparator), alert (latched interrupt), and shutdown (3.8 µA typical).

Its SMAART wire™ interface uses a true single-wire, UART-compatible protocol with automatic baud-rate calibration, supporting up to 32 daisy-chained devices over distances up to 300 meters. Communication includes global commands (e.g., address initialization, alert clear) and individual read/write operations enabled by EEPROM-persisted addressing.

Key Specifications

Pinout & Package

Package: SOIC-8 (4.90 mm × 3.90 mm), surface-mount, JEDEC MS-012 compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX31875 and LM75B, the TMP107BID uniquely combines daisy-chain scalability, dual latched alerts, EEPROM-persisted configuration, and sub-0.5°C accuracy - making it the only option for high-reliability, field-upgradable, multi-node thermal networks requiring minimal wiring and deterministic node addressing.

Availability

TMP107BID is available at Aetrix Electronics and suitable for cold-chain logistics, server thermal management, and industrial HVAC applications requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TMP107BID 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 decades of expertise in precision sensing and industrial-grade reliability.

The TMP107BID belongs to TI's high-accuracy digital temperature sensor product line, designed specifically for distributed, long-distance thermal monitoring in harsh environments where wiring simplicity, node scalability, and EEPROM-backed configuration persistence are critical.

FAQ

What is the maximum number of TMP107BID devices supported on a single SMAART wire™ bus?

The TMP107BID supports up to 32 daisy-chained devices on one SMAART wire™ bus. This is achieved through automated address assignment during the global address-initialize command, which assigns unique 5-bit identifiers stored in each device's EEPROM. The protocol ensures deterministic communication without collision, even at 300-meter cable lengths between nodes.

Does the TMP107BID require external pullup resistors for ALERT1 and ALERT2?

No - the TMP107BID integrates internal 100-kΩ pullup resistors for both ALERT1 and ALERT2. To activate them, connect pins R1 and R2 to V+. If external pullups are preferred (e.g., for tighter voltage threshold control), leave R1 and R2 floating. The internal pullups reduce BOM count and simplify layout while maintaining full open-drain functionality.

How does the TMP107BID achieve ±0.4°C accuracy without system-level calibration?

The TMP107BID achieves ±0.4°C accuracy (–20°C to +70°C) through factory-trimmed sensor gain and offset stored in on-chip EEPROM. This calibration data is applied automatically during conversion, eliminating the need for host MCU compensation routines. Accuracy remains stable across 1.7–5.5 V supply and –55°C to +125°C ambient, as validated in TI's SBOS716D production testing.

Can the TMP107BID operate in environments exceeding +125°C?

The TMP107BID is specified for operation from –55°C to +125°C, but can sustain bias conditions up to +150°C for limited durations without permanent damage or accuracy degradation. However, its maximum reportable temperature remains 127.984°C - above this value, the output saturates. For continuous operation beyond +125°C, thermal derating and reliability validation per JESD22-A108 are required.

What is the role of I/O1 and I/O2 pins on the TMP107BID?

I/O1 and I/O2 are bidirectional SMAART wire™ data terminals. I/O1 serves as the primary interface for daisy-chain communication (receiving from host or upstream device, transmitting to downstream device). I/O2 provides optional differential signaling capability to improve noise immunity in electrically noisy industrial settings - both pins share the same protocol stack and timing requirements.