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Texas Instruments TMP6331DYAR
- Part No.:
- TMP6331DYAR
- Manufacturer:
- Texas Instruments
- Category:
- PTC Thermistors
- Package:
- SC-79, SOD-523
- Datasheet:
-
TMP6331DYAR.pdf
- Description:
- SENSOR PTC 100KOHM 1% SOT5X3
- Quantity:
- Payment:
- Shipping:
Inventory:4,815
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Product details
Overview
TMP6331DYAR from Texas Instruments is a silicon-based linear positive temperature coefficient (PTC) thermistor in a 0603-compatible SOT-5X3 package, with 100-kΩ nominal resistance at 25 °C (±1% tolerance over 0 °C to 70 °C), 6400 ppm/°C TCR at 25 °C, and operating range from –40 °C to +150 °C. It delivers fast thermal response (0.6 s in stirred liquid), built-in fail-safe behavior during short-circuit events, and 0.3% typical long-term drift - enabling high-accuracy, low-calibration temperature sensing in compact industrial and motor-control systems.
For engineers reviewing the TMP6331DYAR datasheet, TMP6331DYAR pinout, TMP6331DYAR application, or TMP6331DYAR equivalent, key selection considerations include its linear R–T curve eliminating external linearization circuitry, ratiometric voltage-divider compatibility, bias-current–dependent sensitivity control, and dual-package footprint support for layout flexibility across thermal monitoring, compensation, and threshold-detection use cases.
Technical Context
The TMP6331DYAR operates as a two-terminal passive resistive sensor with polarity-sensitive terminals (+ and –), requiring positive bias where the + terminal is at higher potential. Its resistance varies linearly with temperature due to proprietary silicon doping and active-area design, yielding consistent TCR across –40 °C to +150 °C (±0.2% typical TCR tolerance).
It functions exclusively in a single operational mode under recommended conditions (VSNS ≤ 5.5 V, ISNS ≤ 40 µA), with self-heating minimized by low power consumption and small thermal mass. Thermal response is characterized separately for stirred liquid (0.6 s) and still air (3.2 s), and fail-safe behavior arises inherently from PTC physics - increasing resistance under overcurrent to limit dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| R25 | 100 kΩ ±1% (0 °C to 70 °C); enables precise baseline calibration without binning |
| TCR at 25 °C | +6400 ppm/°C ±0.2%; ensures stable, predictable sensitivity for linear temperature conversion |
| Operating Temp Range | –40 °C to +150 °C (SOT-5X3/DYA package); supports under-hood and high-temp industrial environments |
| Thermal Response Time | 0.6 s (63% step in stirred liquid); allows rapid detection of transient thermal events |
| Long-Term Drift | ±0.3% typical (1000 h at 150 °C, DYA package); guarantees measurement stability over product lifetime |
| Max Bias Voltage | 5.5 V; defines safe operating ceiling for voltage-divider biasing without self-heating error |
| ESD Rating (HBM) | ±2000 V; provides robust handling in standard manufacturing and assembly environments |
Pinout & Package
The TMP6331DYAR is housed in a 2-pin SOT-5X3 (DYA) package measuring 0.80 mm × 1.20 mm, compatible with standard 0603 footprints. It features exposed pad thermal performance optimized for PCB heat sinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–) | Thermistor negative terminal | Must be held at lower voltage potential than Pin 2; reverse bias risks parametric shift or damage |
| 2 (+) | Thermistor positive terminal | Connected to higher voltage node in bias circuits; polarity defines correct PTC operation and fail-safe behavior |
Key Features
| Feature | Design Value |
|---|---|
| Linear PTC resistance curve | Eliminates need for external linearization resistors or complex lookup tables - simplifies firmware and reduces BOM cost |
| Fail-safe short-circuit response | Self-limiting resistance rise under overvoltage/overcurrent prevents thermal runaway - enhances system safety without external protection |
| Ratiometric voltage-divider compatibility | Enables VBIAS-to-ADC-reference coupling to cancel supply tolerance errors - improves absolute accuracy without precision regulators |
| Low self-heating impact | 0.3% typical long-term drift and <0.6 s thermal time constant allow placement directly on heat sources with minimal measurement lag or offset |
| 0603 footprint compatibility | Supports automated placement using standard 0603 pick-and-place tooling - reduces manufacturing complexity vs. custom packages |
Applications
| Motor Overtemperature Protection | Display Backlight Thermal Compensation |
|---|---|
Use Scenario: Monitoring stator winding temperature in BLDC motors to prevent insulation failure during sustained load. IC Role / Device Role / Timing Role: Two-terminal linear thermistor providing analog resistance output proportional to local temperature. Use Value: 150 °C max rating and fail-safe behavior ensure reliable shutdown before thermal damage occurs; linear output enables direct ADC mapping without polynomial fitting. |
Use Scenario: Adjusting LED backlight brightness in automotive infotainment displays to maintain luminance consistency across cabin temperature swings. IC Role / Device Role / Timing Role: Temperature-sensing element in closed-loop feedback path for PWM dimming control. Use Value: ±1% R25 tolerance and 6400 ppm/°C TCR deliver tight gain matching across units; 0.6 s response captures ambient changes faster than display thermal inertia. |
| HVAC Thermostat Sensing | Industrial PLC Temperature Input Module |
Use Scenario: Ambient air temperature measurement in wall-mounted smart thermostats with space-constrained PCB layouts. IC Role / Device Role / Timing Role: Primary temperature transducer interfaced via voltage divider to microcontroller ADC. Use Value: 0603-compatible SOT-5X3 package enables dense sensor placement near airflow paths; linear R–T curve reduces firmware memory overhead vs. NTC-based solutions. |
Use Scenario: High-reliability temperature input channel in modular industrial PLCs requiring long-term calibration stability. IC Role / Device Role / Timing Role: Field-deployable analog sensor element with traceable metrology-grade drift performance. Use Value: ±0.3% typical long-term drift (1000 h @ 150 °C) meets IEC 61508 SIL-2 requirements for functional safety subsystems without periodic recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar linear thermistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP6331DECR | Same electrical specs, but in 0402-compatible X1SON (DEC) package (0.60 mm × 1.00 mm); 125 °C max operating temp vs. 150 °C | Better suited for ultra-compact consumer electronics where board space is critical and ambient temps stay below 125 °C | Select TMP6331DECR when footprint size is prioritized over extended temperature capability |
| TMP6431DYAR | 47-kΩ R25 (vs. 100-kΩ), identical TCR, package, and temp range; different bias current/voltage scaling for same ADC resolution | Preferred in systems with tighter ADC input range or lower supply voltages where 47-kΩ yields optimal signal swing | Select TMP6431DYAR when existing bias network or ADC full-scale utilization favors ~47-kΩ impedance level |
Compared with TMP6331DECR, TMP6331DYAR trades 0402 footprint compactness for +25 °C operating margin and improved thermal derating headroom; compared with TMP6431DYAR, it provides higher output impedance for reduced noise susceptibility and better compatibility with legacy 100-kΩ reference designs.
Availability
TMP6331DYAR is available at Aetrix Electronics and suitable for motor control, display backlight compensation, and HVAC thermostat applications requiring stable component supply, long-term calibration retention, and high-temperature reliability.
Supply support for TMP6331DYAR 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, embedded processing, and digital signal processing technologies, with leadership in precision sensing and industrial interface solutions.
The TMP63 series was designed specifically to replace NTC thermistors in high-reliability industrial and automotive systems, delivering linearity, fail-safe behavior, and simplified signal conditioning without sacrificing accuracy or temperature range.
FAQ
What is the maximum operating temperature for the TMP6331DYAR?
The TMP6331DYAR has a maximum operating temperature of +150 °C when used in the SOT-5X3 (DYA) package. This rating is validated per TI's Recommended Operating Conditions and supported by thermal characterization data including junction-to-ambient resistance (RθJA = 742.9 °C/W) and long-term drift testing at 150 °C for 1000 hours. Operation beyond this limit may accelerate aging or cause irreversible parametric shift.
Does the TMP6331DYAR require external linearization circuitry?
No, the TMP6331DYAR does not require external linearization circuitry. Its silicon-based PTC structure provides a highly linear resistance-vs.-temperature curve across –40 °C to +150 °C, with typical TCR tolerance of ±0.2%. This linearity enables direct use in voltage-divider or current-source bias configurations, and eliminates the need for parallel compensation resistors or multi-point calibration typically required with NTC thermistors.
How is polarity defined on the TMP6331DYAR, and why does it matter?
The TMP6331DYAR has polarized terminals: Pin 1 is (–) and Pin 2 is (+). Correct polarity - with the + terminal at higher voltage potential than the – terminal - is mandatory for proper PTC behavior and built-in fail-safe operation. Reverse bias can cause parametric instability, increased drift, or permanent degradation. The device's fail-safe function relies on controlled resistance rise under overcurrent, which only occurs with correct terminal orientation.
Can the TMP6331DYAR be used with a microcontroller's internal ADC without external components?
Yes, the TMP6331DYAR can interface directly with a microcontroller's internal ADC using a simple voltage-divider configuration (e.g., 100-kΩ bias resistor) or precision current source. For best accuracy, tie the bias voltage (VBIAS) to the ADC's reference voltage to enable ratiometric cancellation of supply tolerance. TI's Thermistor Design Tool generates application-specific R–T tables and C-code for temperature conversion - no external op-amps or dedicated signal-conditioning ICs are needed for basic implementation.
What is the thermal response time of the TMP6331DYAR, and how is it measured?
The TMP6331DYAR has a thermal response time of 0.6 seconds to reach 63% of final resistance value when transitioning from 25 °C to 125 °C in stirred liquid, per JEDEC JESD51-13 test methodology. In still air, the response slows to 3.2 seconds (25 °C to 70 °C). These values reflect the device's low thermal mass and efficient heat transfer through the SOT-5X3 package's exposed pad - critical for detecting rapid thermal transients in motor windings or power semiconductors.
TMP6331DYAR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Resistance @ 25°C:
- 100 kOhms
- Resistance Tolerance:
- ±1%
- Operating Temperature:
- -40°C ~ 150°C
- Power - Max:
- -
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-5X3
TMP6331DYAR FAQ
1.How can I place an order for TMP6331DYAR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP6331DYAR 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 TMP6331DYAR reliable?
The price and inventory of TMP6331DYAR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP6331DYAR is usually 5 days.
3.What payment methods are accepted for TMP6331DYAR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP6331DYAR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP6331DYAR?
TMP6331DYAR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP6331DYAR 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 TMP6331DYAR?
For technical support, including TMP6331DYAR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP6331DYAR requirements.
6.How does Aetrix verify that TMP6331DYAR is sourced from the original manufacturer or authorized distributors?
All TMP6331DYAR 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 TMP6331DYAR meets industry standards.
7.What is the process for return or replacement of TMP6331DYAR?
All TMP6331DYAR units undergo pre-shipment inspection (PSI). If there is an issue with TMP6331DYAR, 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 TMP6331DYAR part is unused and in its original packaging.
Return procedure for TMP6331DYAR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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