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Texas Instruments TMP75CID
- Part No.:
- TMP75CID
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
TMP75CID.pdf
- Description:
- SENSOR DIGITAL -55C-125C 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,258
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Product details
Overview
TMP75CID from Texas Instruments is a 12-bit digital temperature sensor IC with two-wire (I²C/SMBus) interface, ±0.25°C accuracy from 0°C to +70°C, 0.0625°C resolution, and operates from 1.4 V to 3.6 V supply. It functions as a local PCB temperature monitor in thermal management systems, delivering factory-calibrated readings without external components.
For engineers reviewing the TMP75CID datasheet, TMP75CID pinout, TMP75CID application, or TMP75CID equivalent, this page provides verified technical context, package-specific pin definitions, real-world thermal use cases, and validated alternative options for server, telecom, and power-supply thermal protection designs.
Technical Context
The TMP75CID 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 output is left-justified, twos-complement formatted data with 0.0625°C/LSB scaling.
It supports both comparator-mode and interrupt-mode ALERT operation via programmable THIGH/TLOW registers and TM bit control. The device implements bus timeout (22 ms typ), spike-suppression filters on SDA/SCL, and Schmitt-trigger inputs for noise immunity in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 3.6 V - Enables direct integration into 1.8-V and 3.3-V systems without level-shifting. |
| Temperature Range | –55°C to +125°C - Validated for operation across extended industrial and automotive under-hood conditions. |
| Accuracy (0°C to +70°C) | ±0.25°C (typ) - Sufficient for closed-loop thermal compensation of voltage references or ADCs without system-level calibration. |
| Resolution | 0.0625°C - Supports fine-grained thermal throttling decisions in CPU/GPU power management. |
| Conversion Time | 27 ms (typ) - Enables rapid response to thermal transients while maintaining low average current draw. |
| Quiescent Current | 15 μA (typ, inactive) - Extends battery life in portable thermal monitoring applications. |
| Shutdown Current | 0.3 μA (typ) - Allows ultra-low-power sleep states in always-on environmental sensors. |
| Bus Address Options | 8 unique addresses via A0/A1/A2 pins - Permits multi-sensor thermal mapping on a single I²C bus without address conflict. |
Pinout & Package
Package: SOIC-8 (4.90 mm × 3.90 mm) - Industry-standard surface-mount footprint compatible with automated assembly and thermal vias for PCB conduction cooling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0 | Address select input | Binary LSB of 3-bit slave address; tied to GND or VS to configure one of eight I²C addresses. |
| A1 | Address select input | Binary middle bit of slave address; enables multi-drop bus topology with up to eight TMP75CID sensors. |
| A2 | Address select input | Binary MSB of slave address; determines unique device identity on shared two-wire bus. |
| ALERT | Open-drain output | Active-low (default) overtemperature alert; requires external pull-up; configurable as comparator or interrupt. |
| GND | Ground reference | Primary thermal path to PCB; mounting location directly impacts measured temperature accuracy. |
| SCL | Serial clock input | Accepts 1 kHz–400 kHz (fast mode) or 1 kHz–3 MHz (high-speed mode) clocks; includes integrated filter. |
| SDA | Serial data I/O | Open-drain bidirectional line; supports read/write register access; includes Schmitt trigger and spike suppression. |
| VS | Power supply input | Accepts 1.4–3.6 V; powers internal regulator, ADC, oscillator, and interface logic; no external decoupling required beyond 0.1 µF. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-calibrated accuracy | ±0.25°C (0°C to +70°C) - Eliminates need for end-of-line system calibration in thermal feedback loops. |
| Programmable ALERT behavior | Configurable comparator/interrupt mode with hysteresis via THIGH/TLOW registers - Enables autonomous thermal shutdown without host processor intervention. |
| One-shot conversion mode | Initiated by command; reduces self-heating impact during precision spot measurements - Critical for low-power intermittent sensing. |
| Low-voltage compatibility | Operates down to 1.4 V - Supports direct connection to Li-ion battery rails or energy-harvesting power supplies. |
| ESD robustness | ±2000 V HBM - Ensures reliability during handling and board assembly in standard manufacturing environments. |
| Thermal response fidelity | Die temperature measurement reflects local PCB temperature via metal lead thermal path - Enables accurate hotspot detection near power MOSFETs or FPGAs. |
Applications
| Server Thermal Management | Telecom Equipment Monitoring |
|---|---|
Use Scenario: Real-time CPU, memory, and VRM temperature tracking in 1U rack servers. IC Role / Device Role / Timing Role: Local die-temperature sensor providing 12-bit readings every 80 ms to BMC for dynamic fan speed control and throttling. Use Value: Prevents thermal runaway using ±0.25°C accuracy at operating junction temperatures up to +125°C, reducing system downtime. |
Use Scenario: Monitoring power amplifier and baseband IC temperatures in 5G small-cell radios. IC Role / Device Role / Timing Role: Standalone thermostat triggering ALERT pin when PA die exceeds 95°C, initiating RF power rollback. Use Value: Maintains signal integrity and component lifetime by enforcing thermal limits without host MCU polling overhead. |
| Power Supply Thermal Protection | Industrial Motor Drive Control |
Use Scenario: Overtemperature detection on DC-DC converter output stages and heatsinks in PoE injectors. IC Role / Device Role / Timing Role: Directly mounted on power MOSFET source pad to sense junction-proximate temperature with 0.0625°C resolution. Use Value: Enables fast-response shutdown (<27 ms conversion + ALERT assertion) before thermal damage occurs to GaN FETs. |
Use Scenario: Stator winding and IGBT module temperature supervision in HVAC inverter drives. IC Role / Device Role / Timing Role: Sensor placed on motor control board near gate drivers, feeding thermal data to DSP for torque derating. Use Value: Achieves ±1°C accuracy across –55°C to +125°C range, supporting safe continuous operation in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensing applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMMX/NOPB | 9-bit resolution (0.5°C), ±2°C accuracy from –25°C to +100°C, no ALERT hysteresis programming, fixed 0x48 address. | Limited to basic overtemperature alarms; unsuitable for precision thermal compensation or multi-sensor bus topologies. | Select when cost sensitivity outweighs resolution/accuracy needs and only one sensor per bus is required. |
| ADT75ARMZ | 12-bit resolution, ±2°C accuracy from –55°C to +125°C, 3.0–5.5 V supply, SOIC-8 only, no high-speed mode support. | Requires level-shifting for 1.8-V systems; higher quiescent current (250 μA active); less suitable for battery-powered nodes. | Choose for legacy 3.3/5-V designs where TI's 1.4–3.6 V flexibility and SMBus timeout are not needed. |
Compared with LM75BIMMX/NOPB and ADT75ARMZ, the TMP75CID delivers superior accuracy at low voltage, programmable ALERT hysteresis, and true 8-device bus scalability-making it optimal for modern compact, multi-zone thermal management systems requiring minimal BOM count and layout area.
Availability
TMP75CID is available at Aetrix Electronics and suitable for server thermal management, telecom equipment monitoring, and power supply thermal protection requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TMP75CID 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 industrial interface solutions.
The TMP75CID belongs to TI's precision analog temperature sensor product line, designed specifically for high-accuracy, low-voltage thermal monitoring in space-constrained and power-sensitive applications such as computing, communications, and industrial automation.
FAQ
What is the operating temperature range of the TMP75CID?
The TMP75CID is specified from –55°C to +125°C. This full industrial range is validated across all electrical parameters in the datasheet, including accuracy, conversion time, and quiescent current. The sensor measures its own die temperature, which closely tracks local PCB temperature when mounted with adequate thermal coupling-making the TMP75CID suitable for under-hood automotive modules and high-density server boards where ambient extremes occur.
Does the TMP75CID require external components for basic operation?
No, the TMP75CID requires no external components for core temperature sensing functionality. Only two external pull-up resistors (typically 4.7 kΩ) on SDA and SCL lines are needed for I²C bus operation. The device integrates the temperature-sensing element (BJT), 12-bit ADC, voltage regulator, oscillator, and serial interface-enabling drop-in deployment in space-constrained designs. Decoupling capacitance (0.1 µF) is recommended but not mandatory for stable 1.4–3.6 V operation.
How does the ALERT pin function in comparator mode versus interrupt mode on the TMP75CID?
In comparator mode (TM = 0, default), the TMP75CID's ALERT pin asserts when temperature ≥ THIGH and clears only after temperature falls below TLOW-providing hysteresis to prevent chatter. In interrupt mode (TM = 1), ALERT remains asserted until any register is read, enabling edge-triggered host notification. Both modes support programmable fault count (1–16 conversions) and polarity (active-high/low via POL bit), giving designers flexibility for autonomous thermal protection or polled monitoring architectures using the same TMP75CID hardware.
Can the TMP75CID be used on a 1.8-V I²C bus alongside 3.3-V devices?
Yes, the TMP75CID supports 1.4–3.6 V operation and features I²C-compatible open-drain outputs with VIH/VIL thresholds referenced to VS-not VCC of the bus master. When powered at 1.8 V, its SDA/SCL inputs recognize 0.7×VS (1.26 V) as high, and its outputs drive low to <0.2×VS (0.36 V). With appropriate bus pull-ups (e.g., to 3.3 V) and current-limiting resistors if needed, the TMP75CID interoperates reliably in mixed-voltage I²C systems without level shifters-confirmed in TI's SBOS707B characterization data.
What is the conversion time and update rate of the TMP75CID in continuous mode?
In continuous-conversion mode, the TMP75CID performs a full 12-bit temperature measurement in 27 ms (typical), followed by a 53-ms delay, yielding an effective update rate of 12 Hz (80 ms period). This timing is fixed and independent of supply voltage or temperature. The device draws 45 μA during conversion and drops to 1 μA during delay, resulting in an average quiescent current of 15 μA-optimized for both responsiveness and power efficiency in always-on thermal monitoring applications using the TMP75CID.
TMP75CID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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):
- ±1°C (±3°C)
- Test Condition:
- 0°C ~ 70°C (-55°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SOIC
TMP75CID FAQ
1.How can I place an order for TMP75CID through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP75CID 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 TMP75CID reliable?
The price and inventory of TMP75CID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP75CID is usually 5 days.
3.What payment methods are accepted for TMP75CID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP75CID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP75CID?
TMP75CID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP75CID 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 TMP75CID?
For technical support, including TMP75CID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP75CID requirements.
6.How does Aetrix verify that TMP75CID is sourced from the original manufacturer or authorized distributors?
All TMP75CID 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 TMP75CID meets industry standards.
7.What is the process for return or replacement of TMP75CID?
All TMP75CID units undergo pre-shipment inspection (PSI). If there is an issue with TMP75CID, 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 TMP75CID part is unused and in its original packaging.
Return procedure for TMP75CID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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