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Texas Instruments TMP75BID
- Part No.:
- TMP75BID
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP75BID.pdf
- Description:
- SENSOR DIGITAL -55C-125C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,473
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Product details
Overview
TMP75BID from Texas Instruments is a 12-bit digital temperature sensor with two-wire (I²C/SMBus) interface, ±1°C accuracy from –55°C to +125°C, 0.0625°C resolution, and 1.4 V to 3.6 V supply operation. It functions as a local PCB temperature monitor in thermal protection circuits for power supplies, processors, and motor drivers.
For engineers reviewing the TMP75BID datasheet, TMP75BID pinout, TMP75BID application, or TMP75BID equivalent, key selection criteria include its factory-calibrated accuracy over industrial temperature range, programmable ALERT threshold behavior, shutdown current of 0.3 μA (typ), and dual SOIC-8/VSSOP-8 package availability with pin-compatible drop-in replacement for LM75/TMP75 designs.
Technical Context
The TMP75BID uses an on-die bipolar junction transistor (BJT) in band-gap configuration to generate a voltage proportional to die temperature, digitized by a 12-bit ADC. Its thermal measurement reflects local PCB temperature due to low thermal resistance through metal package leads.
It supports SMBus and standard two-wire protocols up to 400 kHz (fast mode) or 3 MHz (high-speed mode), features three address pins (A0–A2) enabling eight devices per bus, and implements configurable ALERT output in comparator or interrupt mode with hysteresis via TLOW/THIGH registers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Temperature Range | –55°C to +125°C - fully specified operating range for industrial thermal monitoring |
| Accuracy | ±1°C (typ) from –55°C to +125°C - enables reliable overtemperature detection without system-level calibration |
| Resolution | 0.0625°C - 12-bit output allows fine-grained thermal trending and compensation |
| Supply Voltage | 1.4 V to 3.6 V - supports battery-powered and low-voltage embedded systems |
| Quiescent Current | 45 μA (typ) active, 0.3 μA (typ) shutdown - extends battery life in portable thermal sensing |
| Interface | Two-wire (I²C/SMBus) compatible - integrates directly with microcontrollers without protocol translation |
| Alert Output | Open-drain ALERT pin with programmable THIGH/TLOW thresholds - provides autonomous thermal fault signaling |
Pinout & Package
Package: SOIC-8 (4.90 mm × 3.90 mm) and VSSOP-8 (3.00 mm × 3.00 mm). Both packages share identical pinout and functionality.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address select input | Connects to GND or VS to set LSB of 7-bit slave address (1001000–1001111) |
| A1 | Address select input | Connects to GND or VS to set middle bit of slave address |
| A2 | Address select input | Connects to GND or VS to set MSB of slave address - enables up to 8 sensors on one bus |
| ALERT | Open-drain alert output | Active-low (default) or active-high (configurable) output signaling THIGH/TLOW breach |
| GND | Ground reference | Primary thermal path and electrical return for sensor die and ADC |
| SCL | Serial clock input | Master-generated clock for two-wire communication; supports fast (≤400 kHz) and high-speed (≤3 MHz) modes |
| SDA | Serial data I/O | Open-drain bidirectional line with integrated Schmitt triggers and spike suppression |
| VS | Supply voltage input | 1.4 V to 3.6 V power rail; powers internal regulator, ADC, and logic - no external components required |
Key Features
| Feature | Design Value |
|---|---|
| Factory-calibrated accuracy | ±1°C over full –55°C to +125°C range - eliminates need for end-system calibration |
| Programmable ALERT behavior | Configurable as comparator (hysteresis) or interrupt (latched) mode via TM bit - supports both autonomous and host-managed thermal response |
| One-shot conversion mode | 20–35 ms conversion time with user-defined update rate - reduces bus traffic and power vs continuous polling |
| Shutdown mode | 0.3 μA typical current draw - enables ultra-low-power wake-on-temperature applications |
| Multi-device bus support | Three hardware address pins (A0–A2) allow eight unique addresses - simplifies distributed thermal sensing across PCB zones |
Applications
| Server Thermal Management | Power Supply Protection |
|---|---|
Use Scenario: Monitoring CPU, GPU, and VRM temperatures in rack-mounted servers to prevent thermal throttling or shutdown. IC Role / Device Role / Timing Role: Local die-temperature sensor providing real-time feedback to BMC or host controller for dynamic fan control and power scaling. Use Value: ±1°C accuracy ensures precise trip-point enforcement; ALERT pin triggers immediate firmware action without host polling overhead. |
Use Scenario: Detecting overheating in DC-DC converters, AC-DC adapters, and battery chargers to disable output before component failure. IC Role / Device Role / Timing Role: Standalone thermal watchdog interfacing directly with enable/disable logic or PMIC fault inputs. Use Value: Programmable THIGH/TLOW hysteresis prevents oscillation during transient thermal events; 0.0625°C resolution enables adaptive margining. |
| Motor Driver Thermal Monitoring | Environmental Data Logging |
Use Scenario: Measuring heatsink or MOSFET junction temperature in BLDC motor controllers to enforce safe torque limits. IC Role / Device Role / Timing Role: Directly mounted on power stage PCB to track localized thermal rise under load cycles. Use Value: Low thermal resistance package leads ensure <1°C lag between die and measured PCB point; shutdown mode extends idle battery life. |
Use Scenario: Long-term ambient temperature recording in HVAC ducts, smart thermostats, or industrial enclosures. IC Role / Device Role / Timing Role: Primary temperature transducer feeding data to MCU or wireless SoC for cloud reporting. Use Value: 1.4 V minimum supply enables operation from single Li-ion or energy-harvesting sources; SMBus compatibility simplifies multi-sensor network integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIDR | Same pinout and register map; ±2°C accuracy from –25°C to +100°C; 2.7 V to 5.5 V supply only | Limited to commercial temperature range and higher-voltage systems; lacks 1.4 V operation and extended –55°C capability | Select when legacy LM75 compatibility is mandatory and supply >2.7 V is guaranteed |
| TMP1075DGKR | 16-bit resolution (0.0078°C), ±0.25°C accuracy (–40°C to +125°C), same SOIC-8/VSSOP-8 footprint, but no ALERT pin | No autonomous overtemperature signaling; requires host polling or external comparator for fault response | Select when highest precision is critical and thermal alerting is handled externally or via software |
Compared with LM75BIDR, TMP75BID extends usable temperature range downward by 30°C and lowers minimum supply by 1.3 V, while matching pinout and register compatibility. Compared with TMP1075DGKR, TMP75BID trades resolution for integrated ALERT functionality and lower system BOM cost in thermal protection roles.
Availability
TMP75BID is available at Aetrix Electronics and suitable for server thermal management, power supply protection, and motor driver thermal monitoring requiring stable component supply across industrial temperature grades and long production lifecycles.
Supply support for TMP75BID 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 power management ICs.
The TMP75BID belongs to TI's precision analog temperature sensor product line, designed specifically for robust, low-power, factory-calibrated thermal monitoring in space-constrained industrial and computing systems.
FAQ
What is the operating temperature range of the TMP75BID?
The TMP75BID is fully specified from –55°C to +125°C. Its ±1°C (typ) accuracy over this entire range makes it suitable for harsh environments such as industrial motor drives, automotive under-hood modules, and telecom base station power supplies. The device uses on-die thermal sensing with minimal PCB thermal lag, ensuring accurate correlation between die temperature and local board conditions.
Does the TMP75BID support multiple devices on the same I²C bus?
Yes, the TMP75BID supports up to eight devices on a single two-wire bus using three hardware address pins (A0, A1, A2). Each combination of GND/VS connections sets a unique 7-bit slave address (1001000 to 1001111), enabling distributed thermal sensing across different subsystems without address conflicts or software arbitration overhead.
How does the ALERT pin function on the TMP75BID?
The ALERT pin on the TMP75BID operates in two configurable modes: comparator mode (default, TM = 0) for autonomous hysteresis-based overtemperature signaling, or interrupt mode (TM = 1) for latched fault notification until cleared by a register read or SMBus alert response. Its open-drain structure requires an external pull-up resistor and supports active-low or active-high polarity via the POL bit.
What is the resolution and accuracy of the TMP75BID temperature measurement?
The TMP75BID provides 12-bit temperature data with 0.0625°C resolution (1 LSB = 0.0625°C). Its accuracy is ±0.5°C (typ) from –20°C to +85°C and ±1°C (typ) across the full –55°C to +125°C range. This factory-calibrated performance eliminates the need for system-level calibration and supports precise thermal compensation in sensitive analog circuits.
Can the TMP75BID operate from a 1.8-V supply?
Yes, the TMP75BID is optimized for 1.8-V operation and functions across a wide 1.4 V to 3.6 V supply range. At 1.8 V, it delivers 45 μA typical quiescent current and maintains full specification compliance - making it ideal for battery-powered IoT nodes, wearables, and low-voltage embedded controllers where supply headroom is constrained.
TMP75BID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -55°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SMBus
- Voltage - Supply:
- 1.4V ~ 3.6V
- Resolution:
- 11 b
- Features:
- One-Shot, Output Switch, Programmable Limit, Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- -20°C ~ 85°C (-55°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
TMP75BID FAQ
1.How can I place an order for TMP75BID through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP75BID on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMP75BID reliable?
The price and inventory of TMP75BID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP75BID is usually 5 days.
3.What payment methods are accepted for TMP75BID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP75BID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP75BID?
TMP75BID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP75BID order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMP75BID?
For technical support, including TMP75BID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP75BID requirements.
6.How does Aetrix verify that TMP75BID is sourced from the original manufacturer or authorized distributors?
All TMP75BID products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMP75BID meets industry standards.
7.What is the process for return or replacement of TMP75BID?
All TMP75BID units undergo pre-shipment inspection (PSI). If there is an issue with TMP75BID, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMP75BID part is unused and in its original packaging.
Return procedure for TMP75BID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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