TPS3813K33DBVTIn StockTexas Instruments
Texas Instruments TPS3813K33DBVT is a 3.3V processor supervisor IC with windowed watchdog timer, 1-channel voltage monitoring, and manual reset in compact SOT-23-6 package. Ideal for embedded systems requiring reliable power supervision.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (6-Pin)
- Pin Count
- 6
- Lifecycle
- ACTIVE
- Datasheet
- TPS3813K33DBVT Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 3.3V Fixed Threshold Voltage Supervisor with ±2% accuracy for precise power monitoring
- Windowed Watchdog Timer (WWD) prevents system lockup in microcontroller-based designs
- Single-Channel Voltage Monitoring with active-low RESET output for clean power sequencing
- Ultra-compact SOT-23-6 package enables space-constrained embedded and industrial designs
- Wide operating voltage range supports diverse power supply architectures
Applications
The TPS3813K33DBVT is widely used in microcontroller and DSP-based embedded systems to ensure reliable startup and runtime supervision of 3.3V power rails. Its windowed watchdog timer makes it ideal for automotive control units, industrial PLCs, and medical devices where software hang detection is critical. The compact SOT-23-6 footprint suits portable consumer electronics, IoT edge nodes, and battery-powered equipment requiring tight board space management.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | BAT BUP SW:N;MNL RST:N;OV DET:N;PW FL IP:N;PW FL IO:N;PW FL OP:N;PRG RST DLY:N;UV DET:N;WD:N;WWD:Y |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G6 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP6,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.025mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 2V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +2.93V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | SOT23 (6-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
| Country of Origin | Mainland China, Philippines, Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for TPS3813K33DBVT:
Frequently Asked Questions
What is the supply voltage and reset threshold of the TPS3813K33DBVT?
The TPS3813K33DBVT monitors a 3.3V supply rail with a fixed threshold voltage of approximately 3.08V (±2% accuracy). When VDD drops below this threshold, the active-low RESET output is asserted to hold the system in reset until the supply recovers and the timeout period elapses.
What type of watchdog timer does the TPS3813K33DBVT include?
The TPS3813K33DBVT features a windowed watchdog timer (WWD), which requires the WDI input to be toggled within a specific time window — not too early and not too late. This prevents software from servicing the watchdog in tight loops and is more robust than a simple timeout watchdog for detecting firmware lockups in embedded applications.
What package does the TPS3813K33DBVT use and what are the pin count details?
The TPS3813K33DBVT comes in a 6-pin SOT-23 (SOT-23-6) surface-mount package. This small footprint, typically 2.9mm × 1.6mm, makes it suitable for space-constrained PCB designs in portable electronics, wearables, and compact industrial modules.
In which applications is the TPS3813K33DBVT typically used?
The TPS3813K33DBVT is commonly deployed in microcontroller-based systems, automotive ECUs, industrial control equipment, medical devices, and IoT nodes that run on a 3.3V supply. Its combination of voltage supervision and windowed watchdog functionality provides dual protection against both power rail faults and software failures.
What are suitable alternatives or substitutes for the TPS3813K33DBVT?
Compatible alternatives include other TPS3813 series variants for different voltage thresholds (e.g., TPS3813K25 for 2.5V, TPS3813K50 for 5V), as well as competing supervisor ICs like the Maxim MAX6326 or Microchip MCP101 series. Always verify the reset threshold voltage, watchdog type, and package pinout before substituting.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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