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Texas Instruments TMP141AIDBVR
- Part No.:
- TMP141AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Analog and Digital Output
- Package:
- SOT-23-6
- Datasheet:
-
TMP141AIDBVR.pdf
- Description:
- SENSOR DIGITAL -40C-125C SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,035
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Product details
Overview
TMP141AIDBVR from Texas Instruments is a digital temperature sensor IC using the single-wire SensorPath interface, designed for hardware health monitoring in space-constrained systems. It delivers ±2°C accuracy over −25°C to +85°C and ±3°C over −40°C to +125°C, with 10-bit resolution (0.25°C step), 110µA typical quiescent current, and operation from 2.7V to 5.5V - enabling use in motherboards, video cards, and telecom base stations.
For engineers reviewing the TMP141AIDBVR datasheet, TMP141AIDBVR pinout, TMP141AIDBVR application, or TMP141AIDBVR equivalent, key selection considerations include its SOT23-6 package, SensorPath bus compatibility (up to four devices per bus), address configuration via ADD0/ADD1 pins, and absence of external sensing components - critical for thermal monitoring in high-density PCB layouts.
Technical Context
The TMP141AIDBVR integrates an on-die diode-based temperature sensor, ΔΣ ADC, oscillator, control logic, and SensorPath serial interface - all in a monolithic CMOS process. Its internal sensing element eliminates need for external thermistors or RTDs, and thermal path relies primarily on package leads due to low self-heating (<0.25°C).
SensorPath protocol uses pulse-width encoding on a single open-drain SWD line with 1.25kΩ pull-up, supporting Start, Data 0/1, Attention Request (196µs), and Reset (≥348µs) signals. Addressing is determined by ADD0/ADD1 pin states, yielding four unique device numbers (001b–100b), with broadcast support for register writes to Device Control (Reg 5).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Interface | SensorPath single-wire (SWD), open-drain, requires 1.25kΩ pull-up - enables daisy-chaining up to four TMP141AIDBVR units on one signal line. |
| Accuracy | ±2°C max over −25°C to +85°C; ±3°C max over −40°C to +125°C - validated across full industrial temperature range without calibration. |
| Resolution | 10-bit output (0.25°C LSB), left-justified in 16-bit register - supports precise thermal trending and threshold detection in embedded monitoring. |
| Supply Range | +2.7V to +5.5V - compatible with 3.3V and 5V logic domains, including legacy industrial and telecom power rails. |
| Quiescent Current | 110µA typical during conversion; 80–120µA in standby - enables battery-backed or always-on thermal sensing in low-power systems. |
| Operating Temp | −40°C to +125°C (specified); −55°C to +127°C (absolute max) - suitable for under-hood automotive ECUs, base station RF modules, and industrial controllers. |
| Package | SOT23-6 (DBV), 2.9mm × 1.6mm × 1.15mm - ultra-compact footprint ideal for GPU VRM zones, CPU socket proximity, and dense server DIMM slots. |
Pinout & Package
SOT23-6 package with exposed pad not electrically connected; thermal resistance θJA = 200°C/W. Pin 1 marked by dot; orientation per TI DBV drawing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply input | Accepts 2.7V–5.5V; internal LDO not present - must be stabilized externally with 0.1µF bypass capacitor near pin. |
| GND | Ground reference (two pins) | Dual GND pins reduce ground impedance and improve noise immunity for analog sensor core and digital interface. |
| ADD0 | Address input bit 0 | Read at power-up and before each conversion; sets bits AS0 of device number (001b–100b) for bus arbitration. |
| ADD1 | Address input bit 1 | Read at power-up and before each conversion; sets bits AS1/AS2 of device number - enables four unique addresses on one bus. |
| SWD | Single-Wire Data bidirectional I/O | Open-drain, 3.3V-compatible signaling line; master initiates all bits; slave responds with pulse-width encoded data or attention request. |
Key Features
| Feature | Design Value |
|---|---|
| No external sensing components required | On-chip diode sensor eliminates BOM cost, layout area, and calibration overhead for board-level temperature monitoring. |
| Four-device SensorPath addressing | ADD0/ADD1 pins configure one of four discrete addresses (001b–100b), allowing concurrent readout without bus contention. |
| Attention Request interrupt capability | Hardware-generated SWD low pulse (196µs) signals conversion completion or bus error - enables event-driven polling instead of periodic reads. |
| Configurable conversion rate | Register 20h + Device Control bit 2 select 64ms–1532ms intervals - balances thermal response time against power budget in real-time systems. |
| Self-contained reset and status reporting | Power-on reset asserts automatically; BER and ORUN flags in Status Register (Reg 4) enable robust error recovery without host firmware complexity. |
Applications
| Motherboard Thermal Monitoring | Video Card Hot-Spot Detection |
|---|---|
Use Scenario: Real-time die temperature tracking adjacent to CPU socket and VRM phases on ATX server motherboards. IC Role / Device Role / Timing Role: Primary temperature sensor feeding hardware health monitor (HHM) subsystem via SensorPath bus; reports every 190ms (default). Use Value: Enables dynamic fan speed control and thermal throttling before silicon exceeds 105°C - preventing system shutdown while maintaining performance. |
Use Scenario: Localized temperature measurement on GPU power delivery circuitry and memory modules in PCIe graphics cards. IC Role / Device Role / Timing Role: Dedicated thermal sensor placed within 5mm of GPU VRM MOSFETs; communicates via shared SWD bus with system management controller. Use Value: Detects localized hot spots exceeding 115°C with ±2°C accuracy - triggers immediate GPU clock down before thermal damage occurs. |
| Telecom Base Station Power Amplifier | Enterprise Router Line Card |
Use Scenario: Monitoring PA transistor junction temperature in outdoor macrocell base stations operating from −40°C to +65°C ambient. IC Role / Device Role / Timing Role: Sensor integrated into PA module PCB; operates at extended −40°C to +125°C range with 110µA quiescent draw. Use Value: Supports closed-loop PA bias adjustment based on real-time die temp - maintains EVM compliance and extends RF component lifetime. |
Use Scenario: Thermal supervision of packet processing ASICs and PHY transceivers on modular router line cards with 12+ voltage rails. IC Role / Device Role / Timing Role: One of four TMP141AIDBVR units on shared SensorPath bus; assigned unique address via ADD0/ADD1 strap resistors. Use Value: Reduces thermal sensor count and routing complexity by 75% vs. I²C solutions - simplifies high-speed backplane layout and lowers assembly cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital temperature sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | I²C interface, 9-bit resolution (0.5°C), ±2°C accuracy over −25°C to +100°C, SOIC-8 package. | Requires two dedicated I²C lines (SCL/SDA); no native attention interrupt; incompatible bus topology. | Choose when existing I²C infrastructure exists and single-wire bus loading or pin count is not constrained. |
| MAX31820MUA+ | 1-Wire interface (Dallas Semiconductor), 12-bit resolution (0.0625°C), ±0.5°C accuracy, µDFN-6 package. | Uses Dallas 1-Wire protocol (not SensorPath); requires parasitic power mode support; different timing and command set. | Prefer for legacy 1-Wire ecosystems or where higher resolution and tighter accuracy justify protocol migration effort. |
Compared with LM75BIMM/NOPB and MAX31820MUA+, the TMP141AIDBVR offers unique SensorPath integration for multi-sensor bus sharing, deterministic attention signaling, and optimized low-pin-count deployment in space-limited thermal monitoring nodes - without requiring protocol translation or additional level-shifting.
Availability
TMP141AIDBVR is available at Aetrix Electronics and suitable for motherboard thermal management, video card hot-spot detection, and telecom base station power amplifier monitoring requiring stable component supply and long-term industrial lifecycle support.
Supply support for TMP141AIDBVR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets since 1930.
The TMP141AIDBVR belongs to TI's SensorPath temperature sensor family, engineered specifically for hardware health monitoring in high-density computing and telecom infrastructure where minimal footprint, deterministic bus behavior, and low quiescent power are mandatory.
FAQ
What is the maximum number of TMP141AIDBVR sensors that can share one SensorPath bus?
The TMP141AIDBVR supports up to four devices on a single SensorPath bus, each assigned a unique address via ADD0/ADD1 pin strapping (001b–100b). The bus uses open-drain SWD signaling with 1.25kΩ pull-up, and the master identifies devices by reading their Device Number register (Reg 0). Attempting to connect more than four TMP141AIDBVR units will cause address collision and communication failure.
Does the TMP141AIDBVR require external components for basic temperature measurement?
No, the TMP141AIDBVR requires no external sensing elements - its temperature sensing is performed by an on-die diode. For reliable operation, only two external components are mandatory: a 0.1µF ceramic bypass capacitor between V+ and GND, and a 1.25kΩ ±30% pull-up resistor on the SWD line. No calibration, thermistor, or reference voltage source is needed.
How does the TMP141AIDBVR indicate completion of a temperature conversion?
The TMP141AIDBVR sets the Status Function 1 (SF1) flag in Register 4 when conversion completes. If Attention Enable (AT_E) is set in Register Ah, it asserts an Attention Request on the SWD bus (196µs low pulse) - enabling interrupt-driven readout instead of polling. The SF1 flag clears automatically upon reading the Temperature Readout register (Reg 9) or after Device Reset.
What is the default conversion time for the TMP141AIDBVR, and how is it configured?
The TMP141AIDBVR defaults to 190ms conversion time, set by Conversion Rate register (Reg 20h = 2h) and Low-Power Mode disabled (bit 2 of Reg 5 = 0). Conversion time is adjusted by writing values 00b–11b to Reg 20h bits [1:0] and toggling Reg 5 bit 2 - yielding six possible intervals from 64ms to 1532ms, as defined in Table 4 of the SBAS347A datasheet.
Can the TMP141AIDBVR operate from a 5V supply, and what is its absolute maximum rating?
Yes, the TMP141AIDBVR operates across +2.7V to +5.5V, making it fully compatible with 5V systems. Its absolute maximum supply voltage is +7V, but operation above +5.5V voids specifications and risks permanent damage. At 5V, quiescent current remains within 80–120µA (standby) and 110–170µA (converting), with no degradation in accuracy or resolution.
TMP141AIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Sensor Type:
- Digital, Local
- Sensing Temperature - Local:
- -40°C ~ 125°C
- Sensing Temperature - Remote:
- -
- Output Type:
- SensorPath™
- Voltage - Supply:
- 2.7V ~ 5.5V
- Resolution:
- 9 b
- Features:
- Shutdown Mode
- Accuracy - Highest (Lowest):
- ±2°C (±3°C)
- Test Condition:
- -25°C ~ 85°C (-40°C ~ 125°C)
- Operating Temperature:
- -55°C ~ 127°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
TMP141AIDBVR FAQ
1.How can I place an order for TMP141AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP141AIDBVR 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 TMP141AIDBVR reliable?
The price and inventory of TMP141AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP141AIDBVR is usually 5 days.
3.What payment methods are accepted for TMP141AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP141AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP141AIDBVR?
TMP141AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP141AIDBVR 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 TMP141AIDBVR?
For technical support, including TMP141AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP141AIDBVR requirements.
6.How does Aetrix verify that TMP141AIDBVR is sourced from the original manufacturer or authorized distributors?
All TMP141AIDBVR 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 TMP141AIDBVR meets industry standards.
7.What is the process for return or replacement of TMP141AIDBVR?
All TMP141AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TMP141AIDBVR, 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 TMP141AIDBVR part is unused and in its original packaging.
Return procedure for TMP141AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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