My Inquiry
My Account
Texas Instruments TMP708AIDBVT
- Part No.:
- TMP708AIDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TMP708AIDBVT.pdf
- Description:
- THERMOSTAT PROG ACT LOW SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,594
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TMP708AIDBVT from Texas Instruments is a resistor-programmable temperature switch in SOT-23 package, functioning as an overtemperature protection device with open-drain active-low output, ±0.5°C typical threshold accuracy (60°C–100°C), 2.7 V to 5.5 V supply range, and pin-selectable 10°C/30°C hysteresis - used for thermal monitoring in microprocessor-based systems.
For engineers reviewing the TMP708AIDBVT datasheet, TMP708AIDBVT pinout, TMP708AIDBVT application, or TMP708AIDBVT equivalent, key selection factors include external RSET-based trip-point programming, low 40 μA quiescent current, HYST pin logic configuration, and compatibility with standard 5-pin SOT-23 PCB footprints.
Technical Context
The TMP708AIDBVT integrates dual temperature-dependent voltage references (one positive tempco, one negative tempco) and a comparator to determine trip point; the SET pin accepts a 1% external resistor (RSET) that sets the threshold from 0°C to 125°C via analog voltage division.
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 capable of sinking up to 12 mA at 0.3 V, compatible with standard microprocessor reset or interrupt inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 5.5 V - supports direct connection to common logic rails without LDO regulation. |
| Threshold Accuracy | ±0.5°C typical, ±3°C max (60°C–100°C) - enables precise thermal trip points for CPU/GPU thermal throttling. |
| Quiescent Current | 40 μA typical - minimizes system standby 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 - allows wired-OR configuration and flexible pull-up to any logic rail (e.g., 3.3 V or 5 V). |
| Operating Temp | –40°C to +125°C - rated for industrial and automotive under-hood environments. |
| Package | SOT-23 (DBV), 5-pin, 2.90 mm × 1.60 mm - surface-mount compatible with automated assembly and space-constrained PCBs. |
Pinout & Package
SOT-23 (DBV) 5-pin plastic package, 2.90 mm × 1.60 mm body size, 1.45 mm maximum height, JEDEC MO-178 compliant; designed for reflow soldering with MSL Level-2-260°C-1 year rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - SET | Analog input | Connects external 1% resistor to GND to set temperature trip point (0°C–125°C); determines reference voltage ratio. |
| 2 - GND | Analog ground | Device substrate reference; must be low-impedance connection to system ground plane for thermal and noise stability. |
| 3 - OT | Digital output | Open-drain, active-low output; sinks up to 12 mA; requires external pull-up for logic-level interface with microprocessors. |
| 4 - HYST | Digital input | Selects hysteresis: VCC = 10°C, GND = 30°C; floating state causes malfunction - must be hard-wired. |
| 5 - VCC | Analog power | 2.7 V–5.5 V supply input; requires 0.1 μF ceramic bypass capacitor placed adjacent to pin for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Resistor-programmable threshold | Single 1% external RSET sets trip point across full 0°C–125°C range - eliminates need for trimming or calibration ICs. |
| Low-power operation | 40 μA typical supply current - enables continuous monitoring in energy-sensitive applications like portable SSDs or fanless edge devices. |
| Dual hysteresis selection | PIN-controlled 10°C/30°C hysteresis - avoids external RC networks while ensuring stable switching behavior near threshold. |
| Microprocessor-compatible output | Open-drain OT pin with 12 mA sink capability - directly interfaces with reset/interrupt inputs on ARM Cortex, x86, or RISC-V SoCs. |
| Robust thermal design | Junction-to-ambient thermal resistance of 217.9°C/W - die temperature tracks package temperature closely when mounted with thermal vias. |
Applications
| Laptop CPU Thermal Protection | Industrial PLC Overtemperature Monitoring |
|---|---|
|
Use Scenario: Monitors CPU die temperature in thin-client laptops to trigger thermal throttling or forced shutdown before silicon damage occurs. IC Role / Device Role / Timing Role: Standalone temperature switch providing hardware-level overtemperature signal to platform controller hub (PCH) or EC firmware. Use Value: Enables deterministic, low-latency response (<10 ms propagation delay) independent of OS or software stack - critical for safety-critical thermal management. |
Use Scenario: Detects overheating in motor drive modules inside programmable logic controllers deployed in factory automation cabinets. IC Role / Device Role / Timing Role: Hardware fault detector interfacing with PLC's digital input module to halt motion control sequences upon exceeding safe operating temperature. Use Value: Provides fail-safe, non-volatile thermal cutoff without relying on firmware polling - meets IEC 61508 functional safety requirements for SIL-2 subsystems. |
| Medical Imaging Power Supply Monitoring | Automotive Infotainment SoC Thermal Guard |
|
Use Scenario: Supervises heat buildup in high-efficiency DC-DC converters powering MRI gradient amplifiers during long-duration scans. IC Role / Device Role / Timing Role: Analog front-end thermal sensor feeding into redundant watchdog circuitry that disables HV power stages if temperature exceeds 105°C. Use Value: Delivers ±0.5°C typical accuracy at 100°C - ensures compliance with AAMI EC53 medical device thermal safety margins. |
Use Scenario: Protects quad-core application processors in automotive head units from thermal runaway during summer ambient conditions (>85°C cabin). IC Role / Device Role / Timing Role: Dedicated thermal guard IC connected to SoC's thermal diode output, asserting OT signal to PMIC to reduce core voltage/frequency. Use Value: Supports 125°C max operating temperature and 30°C hysteresis mode - prevents repeated cycling during slow thermal decay in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM75BIMM/NOPB | I²C digital output, fixed 75°C threshold, no external RSET, higher 250 μA supply current | Requires MCU firmware support; unsuitable for standalone reset generation | Choose when system already uses I²C bus and needs multi-sensor daisy-chaining. |
| MAX6505UTP+T | Fixed 125°C threshold, no hysteresis selection, 1.7 V–5.5 V supply, 12 μA quiescent current | Lacks programmability and configurable hysteresis - limited to single-point overtemperature cutoff | Choose only for cost-sensitive designs where fixed trip point suffices and ultra-low power is mandatory. |
Compared with LM75BIMM/NOPB and MAX6505UTP+T, the TMP708AIDBVT uniquely combines resistor-based trip-point flexibility, pin-selectable hysteresis, and microamp-level quiescent current - making it optimal for embedded systems requiring hardware-level thermal control without processor dependency.
Availability
TMP708AIDBVT is available at Aetrix Electronics and suitable for laptop thermal management, industrial PLC safety interlocks, and medical power supply supervision requiring stable component supply across extended production lifecycles.
Supply support for TMP708AIDBVT 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 TMP708AIDBVT belongs to TI's precision analog temperature sensing portfolio, engineered specifically for hardware-based thermal protection in space-constrained, low-power electronic systems where firmware-independent reliability is essential.
FAQ
What is the recommended RSET value for a 75°C trip point on the TMP708AIDBVT?
The TMP708AIDBVT uses the quadratic equation RSET (kΩ) = 0.0012T² – 0.9308T + 96.147, where T = 75°C. Solving yields ~29.7 kΩ; a 1% standard value of 29.4 kΩ is recommended. The datasheet Figure 2 confirms this aligns with measured trip accuracy within ±0.5°C typical tolerance. Always verify final trip point with thermal chamber testing due to board-level thermal gradients.
Can the TMP708AIDBVT operate reliably at 125°C junction temperature?
Yes - the TMP708AIDBVT is fully specified from –40°C to +125°C ambient, with absolute maximum junction temperature rated at 150°C. Its 217.9°C/W θJA and 40 μA quiescent current ensure minimal self-heating; at 125°C ambient and 5.5 V supply, die temperature remains within safe limits even with moderate PCB copper area.
Is the TMP708AIDBVT pin-compatible with other SOT-23 temperature switches like the TMP275?
No - the TMP708AIDBVT has unique pin mapping (SET/GND/OT/HYST/VCC) incompatible with I²C-based devices such as the TMP275 (SDA/SCL/ALERT/VCC/GND). Substitution would require PCB layout revision and firmware changes; only direct TI-recommended alternatives like TMP708AIDBVR share identical pinout and functionality.
How does hysteresis selection affect the untrip temperature of the TMP708AIDBVT?
When configured for 10°C hysteresis (HYST = VCC), the TMP708AIDBVT untrips at trip temperature minus 10°C; for 30°C hysteresis (HYST = GND), untrip occurs at trip temperature minus 30°C. For example, with a 85°C trip and 30°C hysteresis, OT returns high only after temperature falls to 55°C - preventing chatter during slow cooldown in enclosed enclosures.
Does the TMP708AIDBVT require a bypass capacitor on the VCC pin?
Yes - a 0.1 μF ceramic capacitor must be placed as close as possible to the VCC pin. This suppresses supply noise that could cause false trips; the datasheet explicitly states noise on VCC results in trip-point error. Use X7R dielectric with low ESR, and avoid shared vias with other ICs to maintain local decoupling integrity.
TMP708AIDBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
TMP708AIDBVT FAQ
1.How can I place an order for TMP708AIDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP708AIDBVT 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 TMP708AIDBVT reliable?
The price and inventory of TMP708AIDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP708AIDBVT is usually 5 days.
3.What payment methods are accepted for TMP708AIDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP708AIDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP708AIDBVT?
TMP708AIDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP708AIDBVT 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 TMP708AIDBVT?
For technical support, including TMP708AIDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP708AIDBVT requirements.
6.How does Aetrix verify that TMP708AIDBVT is sourced from the original manufacturer or authorized distributors?
All TMP708AIDBVT 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 TMP708AIDBVT meets industry standards.
7.What is the process for return or replacement of TMP708AIDBVT?
All TMP708AIDBVT units undergo pre-shipment inspection (PSI). If there is an issue with TMP708AIDBVT, 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 TMP708AIDBVT part is unused and in its original packaging.
Return procedure for TMP708AIDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TMP708AIDBVT Tags
-
N34TS04MT3ETG
onsemi
-
MCP9501PT-095E/OT
Microchip Technology
-
TMP390AQDRLRQ1
Texas Instruments
-
TC6501P125VCTTR
Microchip Technology
-
LM26CIM5-RPA/NOPB
Texas Instruments
-
MCP9509HT-E/OT
Microchip Technology
-
MCP9509CT-E/OT
Microchip Technology
-
MCP9510HT-E/CH
Microchip Technology
-
TC622VOA
Microchip Technology
-
TC620CEOA
Microchip Technology
-
TC622VAT
Microchip Technology
-
MAX6509HAUK+T
Analog Devices Inc./Maxim Integrated
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
