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Texas Instruments TMP303FDRLR
- Part No.:
- TMP303FDRLR
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TMP303FDRLR.pdf
- Description:
- THERMOSTAT 80DEG ACT HI SOT563-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,558
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Product details
Overview
TMP303FDRLR from Texas Instruments is a factory-programmed temperature switch with fixed trip points of 0°C (low) and 80°C (high), operating as a low-power, push-pull, active-high thermal monitor in SOT-563 package. It delivers ±0.2°C typical trip accuracy from –40°C to 125°C, supports 1.4 V to 3.6 V supply, and consumes only 5 μA maximum quiescent current - ideal for battery thermal protection in portable electronics.
For engineers reviewing the TMP303FDRLR datasheet, TMP303FDRLR pinout, TMP303FDRLR application, or TMP303FDRLR equivalent, key selection considerations include its factory-set 0°C/80°C window, selectable 1/2/5/10°C hysteresis via HYSTSET pins, SOH test-enabling functionality, and direct interface capability with microcontrollers without external components.
Technical Context
The TMP303FDRLR implements a fully integrated analog temperature sensor core with comparator-based trip logic and digital hysteresis control. Its trip thresholds are laser-trimmed at wafer level for the specific TMP303F variant (TL = 0°C, TH = 80°C), eliminating need for calibration or external reference.
Hysteresis is configured via two dedicated digital inputs (HYSTSET0/HYSTSET1), each tied to GND or VS to select 1°C, 2°C, 5°C, or 10°C hysteresis windows. The SOH pin provides deterministic output forcing independent of temperature sensing, enabling system-level connectivity verification during production test.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 3.6 V - enables direct operation from single-cell Li-ion, coin cell, or low-voltage rail without regulator. |
| Quiescent Current | Max 5 μA - extends battery life in always-on thermal monitoring applications beyond 10 years on CR2032. |
| Tripping Accuracy | ±0.2°C typical (–40°C to 125°C) - ensures precise thermal event detection without software compensation. |
| Hysteresis Options | 1°C / 2°C / 5°C / 10°C - prevents output chatter near trip point; selected by static logic levels on two pins. |
| Output Type | Push-pull, active-high - eliminates need for external pull-up resistor and reduces BOM count. |
| Operating Temperature | –40°C to +125°C - supports industrial, automotive cabin, and consumer device environments. |
| Power-Up Delay | 20–35 ms - defines minimum response latency after supply stabilization; critical for fast-fail safety systems. |
Pinout & Package
SOT-563 (DRL) package: 1.60 mm × 1.20 mm × 0.6 mm ultra-small footprint, 6-pin surface-mount, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| HYSTSET0 | Digital input | Configures hysteresis magnitude together with HYSTSET1; GND/VS logic selects 1/2/5/10°C window. |
| GND | Ground reference | Primary return path for supply and internal sensor bias; requires low-impedance PCB connection. |
| OUT | Digital output | Active-high push-pull signal indicating temperature breach; drives MCU GPIO directly without pull-up. |
| SOH | Digital input | Forces OUT high regardless of temperature when pulled high; internal 100 kΩ pulldown enables floating-safe default. |
| VS | Power supply | Single 1.4–3.6 V supply input; bypass capacitor (0.1 µF) required adjacent to pin for noise immunity. |
| HYSTSET1 | Digital input | Second hysteresis control bit; paired with HYSTSET0 to define full hysteresis selection matrix. |
Key Features
| Feature | Design Value |
|---|---|
| Factory-programmed trip points | TMP303F variant permanently set to TL = 0°C, TH = 80°C - eliminates field calibration and firmware dependency. |
| Ultra-low quiescent current | 5 μA max across –40°C to +125°C - enables multi-year operation on primary batteries without duty cycling. |
| Programmable hysteresis | Four discrete windows (1/2/5/10°C) selected via two logic pins - avoids oscillation in noisy thermal environments. |
| SOH test mode | Deterministic output forcing via dedicated pin - validates OUT signal path integrity during board-level test. |
| Push-pull output stage | No external pull-up required - simplifies layout, reduces component count, and improves rise/fall time consistency. |
Applications
| Battery Thermal Protection | Wireless Heat Detector |
|---|---|
Use Scenario: Monitoring lithium-ion battery pack temperature during charging/discharging in portable power tools or medical devices. IC Role / Device Role / Timing Role: Standalone thermal switch asserting fault signal when cell temperature exceeds 80°C or drops below 0°C. Use Value: Prevents thermal runaway and cold-charge damage using factory-trimmed thresholds and sub-5 μA current draw. |
Use Scenario: Battery-powered wireless fire alarm heat sensor deployed in historic buildings where wiring is impractical. IC Role / Device Role / Timing Role: Primary temperature decision element triggering RF transmission upon crossing 80°C threshold. Use Value: Enables >5-year battery life with no wake-up controller needed - TMP303FDRLR directly drives transceiver enable line. |
| Fan Speed Control | Consumer Electronics Thermal Management |
Use Scenario: Controlling cooling fan activation in compact set-top boxes or streaming sticks based on SoC junction temperature. IC Role / Device Role / Timing Role: Threshold detector interfacing with fan driver IC or discrete MOSFET gate via active-high OUT. Use Value: Eliminates need for ADC, software polling, or external comparator - reduces firmware complexity and BOM cost. |
Use Scenario: Overtemperature shutdown in Bluetooth earbuds or smartwatches during fast charging or compute-intensive use. IC Role / Device Role / Timing Role: Safety-critical thermal cutoff that disables charging circuitry when internal temperature reaches 80°C. Use Value: Meets IEC 62368-1 thermal hazard requirements with ±0.2°C accuracy and fail-safe hysteresis behavior. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6505UTP+T | Fixed 85°C trip, open-drain output, 12 μA quiescent current, SOT-23-5 package | Lacks dual-threshold (TL/TH) and programmable hysteresis; requires external pull-up | Select when single-point overtemperature detection suffices and higher supply current is acceptable. |
| LM75BIMM/NOPB | I²C digital temperature sensor with programmable thresholds, 250 μA active current, SOIC-8 | Requires MCU interface and firmware; not a drop-in replacement for simple switch function | Choose when adjustable trip points, remote readback, or multi-device bus topology are required. |
Compared with MAX6505UTP+T and LM75BIMM/NOPB, the TMP303FDRLR uniquely combines factory-set dual thresholds (0°C/80°C), ultra-low 5 μA supply, and hardware-configurable hysteresis - delivering plug-and-play thermal protection without software or additional passives.
Availability
TMP303FDRLR is available at Aetrix Electronics and suitable for battery thermal protection, wireless heat detectors, fan control circuits, and consumer electronics thermal management requiring stable component supply and long-lifecycle support.
Supply support for TMP303FDRLR 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 designing analog and embedded processing solutions, with leadership in precision analog, power management, and signal chain technologies.
The TMP303FDRLR belongs to TI's precision temperature switch product line, engineered specifically for ultra-low-power, factory-calibrated thermal monitoring in space-constrained, battery-operated systems.
FAQ
What is the exact trip temperature range programmed into the TMP303FDRLR?
The TMP303FDRLR is the TMP303F variant, factory-programmed with a low trip point (TL) of 0°C and a high trip point (TH) of 80°C. These values are laser-trimmed during manufacturing and cannot be altered in the field. The device asserts its active-high output when temperature rises above 80°C or falls below 0°C, depending on hysteresis configuration and prior state.
Does the TMP303FDRLR require an external pull-up resistor on the OUT pin?
No, the TMP303FDRLR features a true push-pull output stage on the OUT pin, eliminating the need for an external pull-up resistor. This design reduces component count, simplifies PCB layout, and ensures consistent rise/fall times across voltage and temperature ranges - a key advantage over open-drain alternatives like the MAX6505UTP+T.
How is hysteresis configured on the TMP303FDRLR, and what values are supported?
Hysteresis on the TMP303FDRLR is set using two digital input pins: HYSTSET0 and HYSTSET1. Each pin is tied to either GND or VS to select one of four discrete hysteresis windows: 1°C (both GND), 2°C (HYSTSET0=VS, HYSTSET1=GND), 5°C (HYSTSET0=GND, HYSTSET1=VS), or 10°C (both VS). No dynamic control or analog adjustment is possible.
Can the TMP303FDRLR operate from a 1.5 V alkaline battery?
Yes, the TMP303FDRLR supports supply voltages from 1.4 V to 3.6 V, making it fully compatible with 1.5 V alkaline cells across their discharge curve. Its 5 μA maximum quiescent current ensures minimal voltage droop, and its specified trip accuracy remains valid down to 1.4 V - unlike many competing switches that degrade or disable below 1.8 V.
What is the purpose of the SOH pin on the TMP303FDRLR, and how should it be used?
The SOH (Set Output High) pin on the TMP303FDRLR forces the OUT pin to logic high regardless of measured temperature when pulled high. Internally pulled down with a 100 kΩ resistor, it remains inactive when grounded or floating. This feature enables production test verification of the output signal path without thermal cycling - a critical capability for high-volume automated board testing of the TMP303FDRLR.
TMP303FDRLR 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:
- 80°C
- Accuracy:
- ±1°C
- Current - Output (Max):
- 8mA
- Output Type:
- Push-Pull
- Output:
- Active High
- Output Function:
- OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Hysteresis
- Voltage - Supply:
- 1.4 V ~ 3.6 V
- Current - Supply:
- 4µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-5X3
TMP303FDRLR FAQ
1.How can I place an order for TMP303FDRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP303FDRLR 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 TMP303FDRLR reliable?
The price and inventory of TMP303FDRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP303FDRLR is usually 5 days.
3.What payment methods are accepted for TMP303FDRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP303FDRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP303FDRLR?
TMP303FDRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP303FDRLR 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 TMP303FDRLR?
For technical support, including TMP303FDRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP303FDRLR requirements.
6.How does Aetrix verify that TMP303FDRLR is sourced from the original manufacturer or authorized distributors?
All TMP303FDRLR 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 TMP303FDRLR meets industry standards.
7.What is the process for return or replacement of TMP303FDRLR?
All TMP303FDRLR units undergo pre-shipment inspection (PSI). If there is an issue with TMP303FDRLR, 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 TMP303FDRLR part is unused and in its original packaging.
Return procedure for TMP303FDRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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