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Detailed Description

The SmartElex TMP102 Digital Temperature Sensor Breakout Module is a microscopic-footprint, high-efficiency thermal sensing board engineered to deliver highly stable, digital environment logs directly to a host microcontroller. Standard analog temperature sensors rely on slight voltage swings that are heavily prone to line resistance drops and electromagnetic noise over long lines. In contrast, the TMP102 skips these vulnerabilities by utilizing an on-chip 12-bit Analog-to-Digital Converter (ADC) to stream clean, highly linear temperature readings across a robust I2C communication protocol.

This premium breakout board comes populated with onboard 4.7kΩ pull-up resistors for the I2C bus lines (SDA and SCL), guaranteeing signal integrity without needing extra external hardware. Operating over an incredibly wide voltage window from 1.4V to 3.6V, the I2C communication lines employ open-drain signaling. This safety design lets you pull up signals directly to a 3.3V logic line on standard 5V microcontrollers (like an Arduino Uno) without worrying about exceeding the sensor's maximum rating. SmartElex has updated this breakout array with integrated Molex PicoBlade connectors alongside standard 0.1" pin headers, making it just as easy to use inside complex plug-and-play ecosystems as it is on a standard prototyping breadboard.

Key Features and Benefits

• Microscopic Current Dissipation: Draws a minor 10 µA active current and plunges down to just 1 µA during software-triggered shutdown cycles, helping optimize long-term battery cell lifespans on remote IoT endpoints.

• High Operational Resolution: Decodes structural temperature matrices down to 0.0625°C increments, rendering it sensitive enough to map the minor fluctuations in server racks or closed rooms.

• Programmable SMBus Alert Pin: Outfitted with a hardware interrupt output pin (ALT). This allows developers to set upper and lower critical alarm limits that flag the host CPU instantly if a thermal fault occurs.

• Flexible Multi-Sensor Bus Architecture: Features an integrated physical hardware address jumper config. You can cycle between four selectable I2C addresses on a single shared line to run multiple sensors simultaneously.

• Hybrid Interfacing Ecosystem: Shipped with pre-populated Molex PicoBlade connectors for toolless wire patching alongside traditional solder-ready header pads for custom breadboard assemblies.

Technical Specifications

How to Use & Hardware Integration

⚠️ VOLTAGE AND BUS WARNING: The TMP102 is strictly a 3.3V sensor. Always connect its power input pin (VCC) to a regulated 3.3V power source. Because the I2C interface uses open-drain signaling, you can connect the data lines directly to 5V microcontrollers like an Arduino Uno without level shifters. However, you must make sure that no other device on the same I2C bus pulls the lines up to 5V.

Standard Pinout Mapping:

• VCC: Power Input ($1.4 ext{V}$ to $3.6 ext{V}$ DC).

• GND: Ground common circuit reference path.

• SDA: Serial Data I2C channel line.

• SCL: Serial Clock I2C rhythm timing line.

• ALT: Programmable hardware alert active-low interrupt output.

• ADD0: I2C Address configuration control pin.

Changing the Default I2C Address:

By default, the onboard address jumper assigns the module to address 0x48. If you want to use multiple sensors on a single bus line, modify the address by cutting the ADD0 jumper pad trace on the back of the board and wiring the pin to your choice of connection:

• Connect ADD0 to VCC $ ightarrow$ Address changes to 0x49.

• Connect ADD0 to SDA $ ightarrow$ Address changes to 0x4A.

• Connect ADD0 to SCL $ ightarrow$ Address changes to 0x4B.

Applications

• Battery-Powered IoT Tracker Nodes: Ideal for low-power environmental logging nodes that sleep for long intervals and require minimal battery drain.

• Compact Telemetry Weather Stations: Captures ambient outdoor and indoor temperatures cleanly without analog calibration offsets.

• Server Rack & PC Case Thermal Safety: Monitors critical hot zones within computer chassis, using the ALT pin to quickly shut down components during overheating events.

• Industrial Automation Storage Arrays: Tracks thermal thresholds inside climate-sensitive warehouses and distribution facilities.

Package Includes

• 1 x SmartElex TMP102 Digital Temperature Sensor Breakout Board

• 1 x Straight 6-Pin 0.1" (2.54mm) Solder Male Header Strip

Shipping & Delivery

• Free shipping on all product orders above ₹999 across India

• Dispatched promptly within 1-3 business days

• Expected transit delivery times: Metro regions: 1-3 days; Other areas: 3-7 business days

• Safeguarded in static-shielding wrap configurations to prevent ESD degradation to the microcontroller sensor IC