Specifications
| Type | Description |
|---|---|
| Part Number | TMP431 |
| Manufacturer | Texas Instruments |
| Product Type | Remote temperature sensor monitor |
| Category | Sensors |
| Package / Case | VSSOP-8 (DGK), 3.00 mm x 3.00 mm nominal body |
| Remote Temperature Accuracy | ±1 °C |
| Local Temperature Accuracy | ±1 °C |
| Remote Channels | 1 remote channel |
| Local Channels | 1 local channel |
| Interface Type | Two-wire SMBus serial interface |
| Remote Temperature Measurement Range | up to 150 °C |
| Supply Voltage Recommended | 2.7 V min, 3.3 V nominal, 5.5 V max |
| Operating Free-Air Temperature | -40 °C min, 125 °C max |
| Absolute Maximum Supply Voltage | 7 V max |
| Absolute Maximum TMP431 Input Voltage | -0.5 V to V+ + 0.5 V |
| Absolute Maximum TMP431 Input Voltage | -0.5 V to 7 V |
| Absolute Maximum Input Current | 10 mA max |
| Absolute Maximum Operating Temperature | -55 °C min, 127 °C max |
| Junction Temperature | 150 °C max |
| Storage Temperature | -60 °C min, 130 °C max |
| ESD HBM Rating | ±4000 V |
| ESD CDM Rating | ±1000 V |
| ESD Machine Model Rating | ±200 V |
| Local Temperature Error | ±1.25 °C typ, ±2.5 °C max |
| Local Temperature Error | ±0.25 °C typ, ±1 °C max |
| Remote Temperature Error | ±0.25 °C typ, ±1 °C max |
| Remote Temperature Error | ±0.5 °C typ, ±1.5 °C max |
| Remote Temperature Error | ±3 °C typ, ±5 °C max |
| Supply Sensitivity | ±0.2 °C/V typ, ±0.5 °C/V max |
| Local Channel Conversion Time | 12 ms min, 15 ms typ, 17 ms max |
| Remote Channel Conversion Time | 97 ms min, 126 ms typ, 137 ms max |
| Remote Channel Conversion Time | 36 ms min, 47 ms typ, 52 ms max |
| Remote Channel Conversion Time | 72 ms min, 93 ms typ, 100 ms max |
| Remote Channel Conversion Time | 33 ms min, 44 ms typ, 47 ms max |
| Local Temperature Resolution | 12 bits |
| Remote Temperature Resolution | 12 bits |
| Remote Sensor Source Current High | 120 µA |
| Remote Sensor Source Current Medium-High | 60 µA |
| Remote Sensor Source Current Medium-Low | 12 µA |
| Remote Sensor Source Current Low | 6 µA |
| Remote Transistor Ideality Factor | 1.000 or 1.008 |
| Beta Correction Range | 0.1 min, 27 max |
| SMBus Logic Input High Voltage | 2.1 V min |
| SMBus Logic Input Low Voltage | 0.8 V max |
| SMBus Input Hysteresis | 500 mV |
| SMBus Output Low Sink Current | 6 mA |
| Thermal Resistance Junction-to-Ambient | 168.2 °C/W |
| Thermal Resistance Junction-to-Case Top | 59.7 °C/W |
| Thermal Resistance Junction-to-Board | 90.1 °C/W |
| Junction-to-Top Characterization Parameter | 7.7 °C/W |
| Junction-to-Board Characterization Parameter | 88.4 °C/W |
| Alert Output Type | Active-low open-drain |
| Thermal Flag Output Type | Active-low open-drain |
| Datasheet Status | request_only |
Product Overview
The TMP431 is a Texas Instruments remote temperature sensor monitor for Sensor applications requiring one local temperature channel and one remote diode-sensor channel. The remote measurement range extends up to 150 °C, and both local and remote channels are listed with ±1 °C accuracy in the feature summary. Electrical tables specify 12-bit resolution for each channel.
The device communicates through a two-wire SMBus serial interface supporting SMBus write byte, read byte, send byte, and receive byte commands. SMBus input thresholds are specified as 2.1 V minimum for logic high and 0.8 V maximum for logic low, with 500 mV input hysteresis and 6 mA output-low sink current.
TMP431 is supplied in the DGK VSSOP-8 package with a 3.00 mm x 3.00 mm nominal body. Recommended operation covers 2.7 V to 5.5 V supply and -40 °C to 125 °C free-air temperature. The device also provides active-low open-drain ALERT/THERM2 and THERM outputs that require pullup resistors to V+.
Key Features
- One remote diode temperature channel
- One local temperature sensor channel
- ±1 °C local and remote feature-summary accuracy
- Remote temperature measurement range up to 150 °C
- Two-wire SMBus serial interface with byte commands
- 2.7 V to 5.5 V recommended supply range
- 12-bit local and remote temperature resolution
- Active-low open-drain ALERT/THERM2 output
- Active-low open-drain THERM output
- VSSOP-8 DGK 3.00 mm square nominal body
Typical Applications
- Remote diode temperature monitoring
- Local board temperature monitoring
- SMBus thermal telemetry
- Alert-based thermal control
- Thermal flag output monitoring
- Systems using VSSOP-8 sensors
Procurement Notes
When requesting a quote for TMP431, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
What type of sensor is the TMP431?
The TMP431 is a Texas Instruments remote temperature sensor monitor. It is categorized as a Sensor and provides one remote diode channel plus one local temperature channel in a VSSOP-8 DGK package.
What interface does the TMP431 use?
The TMP431 uses a two-wire SMBus serial interface. The extracted facts state support for SMBus write byte, read byte, send byte, and receive byte commands.
What supply range is recommended for TMP431 operation?
Recommended operating conditions specify a 2.7 V minimum supply, 3.3 V nominal supply, and 5.5 V maximum supply. Supply sensitivity is specified for local and remote measurements across 2.7 V to 5.5 V.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: July 28, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.