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Texas Instruments TMP708AIDBVR
- Part No.:
- TMP708AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TMP708AIDBVR.pdf
- Description:
- THERMOSTAT PROG ACT LOW SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:9,564
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Product details
Overview
TMP708AIDBVR from Texas Instruments is a resistor-programmable temperature switch in SOT-23 (DBV) package, featuring ±0.5°C typical threshold accuracy, 40 μA typical quiescent current, and pin-selectable 10°C/30°C hysteresis - used for overtemperature protection in microprocessor-based systems.
For engineers reviewing the TMP708AIDBVR datasheet, TMP708AIDBVR pinout, TMP708AIDBVR application, or TMP708AIDBVR equivalent, key selection criteria include external RSET-based trip-point programming (0°C to 125°C), open-drain active-low output compatibility with 2.7 V–5.5 V supply rails, and hysteresis configuration via HYST pin logic level.
Technical Context
The TMP708AIDBVR integrates dual temperature-dependent voltage references (one positive tempco, one negative tempco) and a comparator to determine trip point when their voltages intersect. The SET pin accepts an external 1% resistor to set threshold across 0°C–125°C range.
Hysteresis is controlled digitally via the HYST pin: logic high (VCC) selects 10°C hysteresis; logic low (GND) selects 30°C. The OT pin delivers open-drain, active-low output with 5 mA sink capability at 0.3 V, enabling direct interface with microprocessor reset or interrupt inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Threshold Accuracy | ±0.5°C typical, ±3°C max (60°C–100°C): enables precise thermal trip without calibration. |
| Supply Voltage Range | 2.7 V to 5.5 V: supports direct connection to common logic rails including 3.3 V and 5 V systems. |
| Quiescent Current | 40 μA typical: minimizes power impact in battery-backed or always-on monitoring circuits. |
| Hysteresis Options | 10°C (HYST = VCC) or 30°C (HYST = GND): prevents output oscillation near trip point without external components. |
| Output Type | Open-drain, active-low OT pin: allows wired-OR configuration and flexible pull-up voltage selection. |
| Operating Temperature | –40°C to +125°C: suitable for industrial, automotive, and server environments with wide ambient swings. |
| Package | SOT-23 (DBV), 5-pin, 2.90 mm × 1.60 mm: compact footprint compatible with high-density PCB layouts. |
Pinout & Package
SOT-23 (DBV) package: 5-pin, surface-mount, 2.90 mm × 1.60 mm body size, 1.45 mm max height, moisture sensitivity level 2 (260°C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 – SET | Analog input | Connects external 1% resistor to GND to program trip temperature (0°C–125°C); sets positive tempco reference voltage. |
| 2 – GND | Analog ground | Reference node for internal circuitry and RSET; must be low-impedance connection to system ground plane. |
| 3 – OT | Digital output | Open-drain, active-low output; sinks up to 5 mA at 0.3 V; requires external pull-up to VCC or logic rail. |
| 4 – HYST | Digital input | Selects hysteresis: tie to VCC for 10°C, tie to GND for 30°C; floating or intermediate voltages cause malfunction. |
| 5 – VCC | Analog power | 2.7 V–5.5 V supply input; requires 0.1 µF bypass capacitor placed adjacent to pin per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Resistor-programmable threshold | Single 1% external resistor (RSET) sets trip point from 0°C to 125°C - eliminates need for trimming or digital configuration. |
| Pin-selectable hysteresis | Hardware-selectable 10°C or 30°C hysteresis via HYST pin logic level - no firmware or external timing components required. |
| Low-power operation | 40 μA typical supply current enables use in energy-sensitive applications such as portable equipment and always-on thermal monitors. |
| Robust output interface | Open-drain OT output supports mixed-voltage systems and simplifies integration with microprocessor reset/interrupt inputs. |
| Wide operating range | –40°C to +125°C junction temperature range ensures reliable performance in harsh industrial and automotive under-hood environments. |
Applications
| Server CPU Thermal Monitoring | Laptop Battery Pack Protection |
|---|---|
|
Use Scenario: Real-time die temperature monitoring of multi-core processors during sustained compute loads. IC Role / Device Role / Timing Role: Temperature switch providing hardware-level overtemperature shutdown signal to platform controller hub (PCH) or baseboard management controller (BMC). Use Value: Prevents thermal runaway by asserting active-low OT signal at precisely programmed threshold (e.g., 95°C), with 10°C hysteresis ensuring stable recovery before re-enabling operation. |
Use Scenario: Monitoring cell stack temperature during fast charging or high-discharge cycles in Li-ion battery packs. IC Role / Device Role / Timing Role: Standalone thermal cutoff device interfacing directly with battery protection IC or charger controller via open-drain OT output. Use Value: Enables rapid response (<100 ms typical) to abnormal heating events using only RSET and pull-up resistor - no MCU intervention required. |
| Industrial PLC I/O Module | Automotive Infotainment SoC Thermal Throttling |
|
Use Scenario: Ambient temperature supervision inside sealed control cabinets housing programmable logic controllers. IC Role / Device Role / Timing Role: Local thermal watchdog triggering system-level fault flag or fan speed control logic upon exceeding safe enclosure temperature. Use Value: Operates reliably across –40°C to +125°C ambient range with ±0.5°C typical accuracy - reduces need for software compensation or recalibration. |
Use Scenario: Die temperature sensing for application processor thermal management in head-unit systems. IC Role / Device Role / Timing Role: Hardware trip generator feeding OT signal into SoC's thermal interrupt input to initiate dynamic frequency scaling or display blanking. Use Value: Provides deterministic, low-latency response independent of OS scheduler latency - critical for safety-critical thermal mitigation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP275AIDBVR | Digitally programmable (I²C), ±0.5°C accuracy, 10-bit resolution, 1.7 V–5.5 V supply - requires MCU interface and firmware support. | Used where adjustable thresholds or logging capability is needed; not suitable for standalone hardware trip applications. | Select TMP275AIDBVR only if digital configurability and temperature readback are required; TMP708AIDBVR remains optimal for fixed, resistor-set hardware protection. |
| TMP1075NQDGKRQ1 | Automotive-grade (AEC-Q100), ±0.5°C accuracy, 1.8 V–5.5 V, I²C interface - qualified for under-hood use but lacks resistor-programmable simplicity. | Targeted at automotive infotainment or ADAS modules requiring qualification and digital bus integration. | Choose TMP1075NQDGKRQ1 for AEC-Q100-compliant designs needing I²C telemetry; TMP708AIDBVR offers lower BOM count and zero-firmware thermal cutoff. |
Compared with TMP275AIDBVR and TMP1075NQDGKRQ1, the TMP708AIDBVR delivers faster, deterministic overtemperature response without MCU dependency or communication overhead - ideal for safety-critical hardware reset paths where simplicity and reliability outweigh configurability.
Availability
TMP708AIDBVR is available at Aetrix Electronics and suitable for server thermal management, laptop battery protection, and industrial PLC monitoring requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for TMP708AIDBVR 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, specializing in analog, embedded processing, and connectivity technologies with over 50 years of innovation in precision analog ICs.
The TMP708AIDBVR belongs to TI's precision temperature sensor family designed specifically for hardware-based thermal protection - emphasizing resistor-programmability, low power, and robust open-drain output for direct integration into safety-critical subsystems.
FAQ
What is the recommended external resistor tolerance for accurate trip-point setting on the TMP708AIDBVR?
The TMP708AIDBVR datasheet specifies use of a 1% tolerance resistor between SET and GND to achieve the stated ±0.5°C typical threshold accuracy. Using a 5% resistor introduces additional error that may exceed the ±3°C maximum specification over 60°C–100°C, especially at extreme trip points. For production designs targeting tight thermal margins, 0.5% or 0.1% resistors further improve repeatability but are not required for nominal operation.
Can the TMP708AIDBVR operate reliably at VCC = 2.7 V while maintaining full accuracy specifications?
Yes, the TMP708AIDBVR is fully specified from 2.7 V to 5.5 V, including all electrical characteristics: ±0.5°C typical threshold accuracy, 40 μA typical quiescent current, and proper hysteresis behavior remain valid at minimum supply. The device also guarantees reset operation down to VCC = 0.8 V, ensuring fail-safe behavior during brownout conditions - a key feature confirmed in the datasheet's "Reset Operation Specified at VCC = 0.8 V" bullet.
How does hysteresis selection affect the actual trip and release temperatures of the TMP708AIDBVR?
Hysteresis defines the temperature difference between trip (assertion) and release (deassertion) points. With HYST = VCC, the TMP708AIDBVR trips at the programmed threshold (e.g., 85°C) and releases at 75°C (10°C below). With HYST = GND, it trips at 85°C and releases at 55°C (30°C below). This gap prevents output chatter near threshold and is implemented internally via bias adjustment of the positive tempco reference - no external components are needed.
Is the TMP708AIDBVR pin-compatible with other devices in the TMP708 family, such as TMP708AIDBVT?
Yes, all TMP708 variants including TMP708AIDBVR and TMP708AIDBVT share identical SOT-23 (DBV) 5-pin package, pinout, and functional behavior. The suffix differences indicate tape-and-reel packaging (DBVR = 3000-piece reel) versus cut-tape (DBVT), not electrical or mechanical variation. Layouts designed for TMP708AIDBVR can accept any DBV-packaged TMP708 without modification.
What is the maximum recommended pull-up resistor value for the OT pin of the TMP708AIDBVR?
The TMP708AIDBVR OT pin supports pull-up resistors up to 470 kΩ while maintaining guaranteed 5 mA sink capability at 0.3 V. However, higher values increase rise time and noise susceptibility. For most applications, 10 kΩ to 100 kΩ is recommended: 10 kΩ ensures fast edge transitions for microprocessor reset inputs, while 100 kΩ balances power savings and noise immunity. Values above 220 kΩ should be validated for timing margin in high-speed or noisy environments.
TMP708AIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- Programmable
- Accuracy:
- ±3°C
- Current - Output (Max):
- 20mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Trip Point
- Voltage - Supply:
- 2.7 V ~ 5.5 V
- Current - Supply:
- 40µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-5
TMP708AIDBVR FAQ
1.How can I place an order for TMP708AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP708AIDBVR 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 TMP708AIDBVR reliable?
The price and inventory of TMP708AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP708AIDBVR is usually 5 days.
3.What payment methods are accepted for TMP708AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP708AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP708AIDBVR?
TMP708AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP708AIDBVR 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 TMP708AIDBVR?
For technical support, including TMP708AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP708AIDBVR requirements.
6.How does Aetrix verify that TMP708AIDBVR is sourced from the original manufacturer or authorized distributors?
All TMP708AIDBVR 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 TMP708AIDBVR meets industry standards.
7.What is the process for return or replacement of TMP708AIDBVR?
All TMP708AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TMP708AIDBVR, 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 TMP708AIDBVR part is unused and in its original packaging.
Return procedure for TMP708AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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