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Texas Instruments TMP302BQDRLRQ1
- Part No.:
- TMP302BQDRLRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TMP302BQDRLRQ1.pdf
- Description:
- THERMOSTAT ACT LOW OPEN DRN 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:7,146
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Product details
Overview
TMP302BQDRLRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive temperature switch in SOT563 package, providing pin-selectable trip points (70°C, 75°C, 80°C, or 85°C), ±0.2°C typical trip accuracy from 40°C to 125°C, 15 μA max quiescent current, and open-drain active-low output - used for overtemperature alerting in engine control units and thermal protection circuits.
For engineers reviewing the TMP302BQDRLRQ1 datasheet, TMP302BQDRLRQ1 pinout, TMP302BQDRLRQ1 application, or TMP302BQDRLRQ1 equivalent, key selection considerations include trip-point configurability via TRIPSET0/TRIPSET1 pins, selectable 5°C/10°C hysteresis via HYSTSET, operation from 1.4 V to 3.6 V supply, and qualification for –40°C to +125°C ambient automotive environments.
Technical Context
The TMP302BQDRLRQ1 implements a precision bandgap-based temperature sensor feeding a comparator with digitally configurable thresholds. Trip point is set by two digital inputs (TRIPSET0/TRIPSET1) tied to GND or VS, selecting one of four fixed thresholds within the 70–85°C range. Hysteresis is controlled independently via HYSTSET (GND = 5°C, VS = 10°C), preventing output oscillation during thermal transitions.
It operates as a self-contained, microprocessor-independent thermal monitor: no external components beyond a 0.1-μF bypass capacitor and pullup resistor are required. The open-drain OUT pin drives low when temperature reaches or exceeds the selected threshold and returns high only after temperature falls below (threshold – hysteresis), ensuring robust noise-immune signaling in automotive ECU subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 3.6 V - supports direct connection to low-voltage automotive rails including 1.8 V and 3.3 V domains without level-shifting. |
| Quiescent Current | 8 μA (typical) to 15 μA (max) - enables always-on thermal monitoring in battery-sensitive applications like telematics modules. |
| Tripping Accuracy | ±0.2°C (typical) from 40°C to 125°C - ensures precise overtemperature detection critical for engine coolant or powertrain thermal management. |
| Selectable Trip Points | 70°C, 75°C, 80°C, 85°C - configured via static logic levels on TRIPSET0/TRIPSET1 pins; no firmware or I²C required. |
| Hysteresis Options | 5°C (HYSTSET = GND) or 10°C (HYSTSET = VS) - prevents chatter near threshold in noisy thermal environments such as under-hood electronics. |
| Output Type | Open-drain, active-low - allows wired-OR configuration with multiple sensors and compatibility with standard 3.3 V or 5 V logic pullups. |
| Ambient Operating Range | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for placement in harsh automotive locations including transmission control units. |
Pinout & Package
SOT563 (DRL) package: 1.6 mm × 1.6 mm × 0.6 mm footprint with 6-pin leadless construction, optimized for space-constrained automotive PCBs and compatible with standard reflow profiles (MSL Level-2-260°C-1 year).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - TRIPSET0 | Digital input | LSB of trip-point selection; combined with TRIPSET1 to configure 70/75/80/85°C threshold per Table 1 in datasheet. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and sensor bias; must be connected to low-impedance system ground plane. |
| 3 - OUT | Digital output | Open-drain, active-low alert signal; requires external pullup (10–100 kΩ) to VS; sinks up to 10 mA. |
| 4 - HYSTSET | Digital input | Selects hysteresis window: GND = 5°C, VS = 10°C - determines how far temperature must drop before output releases. |
| 5 - VS | Power supply | Single supply input (1.4–3.6 V); powers internal sensor, comparator, and output driver; bypass with 0.1 µF capacitor. |
| 6 - TRIPSET1 | Digital input | MSB of trip-point selection; paired with TRIPSET0 to select one of four factory-trimmed thresholds in 5°C increments. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±2000 V, CDM ±1000 V - suitable for safety-critical vehicle subsystems. |
| Pin-selectable trip points | Four discrete thresholds (70/75/80/85°C) set at assembly via simple PCB trace routing - eliminates firmware dependency and calibration overhead. |
| Configurable hysteresis | 5°C or 10°C window selected by single logic-level input - prevents false triggering during slow thermal transients in HVAC or battery packs. |
| Ultra-low quiescent current | 15 μA maximum across full temperature range - enables continuous monitoring in always-on domains without compromising battery life. |
| Self-contained operation | No external components beyond 0.1 µF bypass cap and pullup resistor - reduces BOM count, layout area, and validation effort vs. ADC + MCU solutions. |
Applications
| Engine Control Unit (ECU) | Infotainment System Thermal Protection |
|---|---|
Use Scenario: Monitoring coolant or intake air temperature to trigger fan activation or power derating before critical overheating occurs. IC Role / Device Role / Timing Role: Standalone overtemperature switch providing immediate hardware-level shutdown signal independent of main ECU processor. Use Value: Prevents thermal damage to power semiconductors and microcontrollers using deterministic, low-latency response (<35 ms valid after power-up) and ±0.2°C accuracy at 125°C. |
Use Scenario: Detecting excessive heat buildup inside head unit enclosures due to prolonged display backlight use or processor load. IC Role / Device Role / Timing Role: Hardware thermal cutoff that forces system reset or display dimming before plastic housing deforms or touch panel fails. Use Value: Enables fail-safe thermal management without software intervention; 70–85°C trip range aligns with common polymer deformation thresholds and avoids nuisance trips during transient loads. |
| Central Body Control Module (CBCM) | Automotive Black Box (Event Data Recorder) |
Use Scenario: Monitoring ambient temperature near door module electronics to prevent condensation-induced corrosion or relay contact welding. IC Role / Device Role / Timing Role: Ambient temperature supervisor that disables non-critical functions (e.g., power windows) when enclosure temperature exceeds safe operating limits. Use Value: Extends service life of electromechanical components using low-power (15 μA) continuous monitoring and AEC-Q100 qualified reliability. |
Use Scenario: Protecting flash memory and real-time clock circuitry in crash-recording systems exposed to under-dash temperatures exceeding 100°C during summer parking. IC Role / Device Role / Timing Role: High-accuracy thermal watchdog that asserts hardware reset if temperature exceeds 85°C - preserving data integrity during thermal stress events. Use Value: Ensures black box remains operational through extreme ambient cycles using ±0.2°C trip accuracy and guaranteed functionality up to 125°C junction temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMMX/NOPB | I²C interface, 9-bit resolution, ±2°C accuracy, 3.0–5.5 V supply - lacks pin-selectable trip points and automotive qualification. | Requires MCU interaction; suited for lab equipment or industrial controllers where programmability outweighs simplicity. | Choose LM75BIMMX/NOPB only if digital configuration and multi-sensor bus sharing are required; not drop-in for TMP302BQDRLRQ1's hardware-triggered use cases. |
| MAX6505UTT+T | Fixed 85°C trip, ±3°C accuracy, SOT23-5 package, 12 μA quiescent current - no hysteresis selection or trip-point flexibility. | Designed for cost-sensitive consumer applications; lacks AEC-Q100 qualification and wide temperature range. | Consider MAX6505UTT+T only for non-automotive designs needing minimal footprint and fixed-threshold simplicity; cannot replace TMP302BQDRLRQ1 in Grade 1 systems. |
Compared with LM75BIMMX/NOPB and MAX6505UTT+T, the TMP302BQDRLRQ1 uniquely delivers automotive-grade reliability, pin-configurable trip points within the 70–85°C range, and selectable hysteresis - enabling hardware-only thermal protection without MCU involvement or firmware updates.
Availability
TMP302BQDRLRQ1 is available at Aetrix Electronics and suitable for engine control units, infotainment thermal protection, and central body control modules requiring stable component supply across extended automotive production lifecycles.
Supply support for TMP302BQDRLRQ1 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 automotive, industrial, and power management ICs.
The TMP302-Q1 product line was designed specifically for automotive thermal monitoring applications requiring AEC-Q100 qualification, ultra-low power consumption, and hardware-based trip-point configurability - eliminating reliance on software-controlled temperature sensing.
FAQ
What is the exact trip-point range supported by TMP302BQDRLRQ1?
The TMP302BQDRLRQ1 supports four discrete, factory-trimmed trip points: 70°C, 75°C, 80°C, and 85°C. These are selected exclusively via static logic levels applied to the TRIPSET0 and TRIPSET1 pins - no programming or communication interface is involved. The device does not support intermediate or user-defined thresholds outside this set, and its trip accuracy is specified as ±0.2°C typical across the full operating range of –40°C to +125°C ambient temperature.
How does hysteresis work on TMP302BQDRLRQ1, and what are the configuration options?
Hysteresis on the TMP302BQDRLRQ1 is implemented via the HYSTSET pin: connecting it to GND selects 5°C hysteresis, while connecting it to VS selects 10°C. When the temperature crosses the trip point, the open-drain OUT pin goes low and remains low until temperature drops below (trip point – hysteresis). For example, with a 80°C trip and HYSTSET = VS, OUT returns high only when temperature falls to 70°C. This prevents output oscillation during slow thermal transitions and is fully hardware-configurable without firmware.
Is TMP302BQDRLRQ1 compatible with 1.8 V microcontroller I/O logic levels?
Yes - the TMP302BQDRLRQ1 operates from 1.4 V to 3.6 V and defines VIH as ≥0.7 × VS and VIL as ≤0.3 × VS. At VS = 1.8 V, VIH ≥1.26 V and VIL ≤0.54 V, making it fully compatible with standard 1.8 V CMOS logic. Its TRIPSET0, TRIPSET1, and HYSTSET inputs accept these levels directly, and the open-drain OUT can be pulled up to 1.8 V, 3.3 V, or 5 V depending on system requirements - enabling seamless integration into mixed-voltage automotive subsystems.
What packaging and assembly information is available for TMP302BQDRLRQ1?
TMP302BQDRLRQ1 is supplied in SOT563 (DRL) package: 1.6 mm × 1.6 mm × 0.6 mm, 6-pin leadless construction with JEDEC MO-293 UAAD compliance. It ships in 4000-unit tape-and-reel format (180 mm reel diameter, 8.4 mm width), rated MSL Level-2-260°C-1 year. The part marking is "SHR", and the package features symmetric pin 1 quadrant (Q3) with 0.69 mm A0 and 1.78 mm B0 dimensions - fully compatible with standard SMT pick-and-place and reflow processes used in automotive electronics manufacturing.
Does TMP302BQDRLRQ1 require external components to operate?
No - the TMP302BQDRLRQ1 functions as a complete, self-contained temperature switch with no external passive components required for basic operation. A 0.1 µF ceramic bypass capacitor between VS and GND is strongly recommended for noise immunity, and a pullup resistor (10–100 kΩ) from OUT to VS is needed to establish the high state. Neither component is integrated internally, but both are standard, low-cost, and placement-minimal - distinguishing TMP302BQDRLRQ1 from solutions requiring ADCs, op-amps, or microcontrollers.
TMP302BQDRLRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 70°C, 75°C, 80°C, 85°C
- Accuracy:
- ±2°C
- Current - Output (Max):
- 10mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Trip Point
- Voltage - Supply:
- 1.4 V ~ 3.6 V
- Current - Supply:
- 8µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Supplier Device Package:
- SOT-5X3
TMP302BQDRLRQ1 FAQ
1.How can I place an order for TMP302BQDRLRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP302BQDRLRQ1 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 TMP302BQDRLRQ1 reliable?
The price and inventory of TMP302BQDRLRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP302BQDRLRQ1 is usually 5 days.
3.What payment methods are accepted for TMP302BQDRLRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP302BQDRLRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP302BQDRLRQ1?
TMP302BQDRLRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP302BQDRLRQ1 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 TMP302BQDRLRQ1?
For technical support, including TMP302BQDRLRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP302BQDRLRQ1 requirements.
6.How does Aetrix verify that TMP302BQDRLRQ1 is sourced from the original manufacturer or authorized distributors?
All TMP302BQDRLRQ1 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 TMP302BQDRLRQ1 meets industry standards.
7.What is the process for return or replacement of TMP302BQDRLRQ1?
All TMP302BQDRLRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with TMP302BQDRLRQ1, 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 TMP302BQDRLRQ1 part is unused and in its original packaging.
Return procedure for TMP302BQDRLRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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