TPS3851G33SDRBT Texas Instruments Integrated Circuit (Other) In Stock
TPS3851G33SDRBT is a high-accuracy 3.3 V voltage supervisor with integrated watchdog timer from Texas Instruments in an 8-pin SON package. It monitors supply rails with tight threshold accuracy and resets the system on undervoltage events. Operates from -40°C to 125°C; available from stock worldwide.
- Manufacturer
- Texas Instruments
- Package
- Other
- Pin Count
- 13
- Lifecycle
- ACTIVE
- Datasheet
- TPS3851G33SDRBT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.0800(MOQ 10)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V threshold with high threshold accuracy ensuring reliable undervoltage detection for sensitive microcontroller supply rails
- Integrated watchdog timer in a single 8-pin SON package eliminates external watchdog components and reduces BOM cost
- Wide operating temperature range from -40°C to +125°C makes it suitable for industrial and automotive supervisory designs
Applications
TPS3851G33SDRBT is designed for microcontroller and processor reset supervision in industrial control modules, automotive body electronics, and medical devices where a fixed 3.3 V supply must be continuously monitored for undervoltage faults. The integrated watchdog timer ensures the processor restarts automatically if firmware hangs, adding system reliability without requiring extra discrete watchdog ICs. Its compact 8-pin SON footprint fits tight PCB layouts in handheld instruments and IoT gateway boards requiring robust power sequencing.
Specifications
| Pbfree Code | Yes |
| Date Of Intro | 2016-11-22 |
| YTEOL | 15 |
| Additional Feature | THRESHOLD VOLTAGE IS 3.3V |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | S-PDSO-N8 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | SQUARE |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Current-Max (Isup) | 0.019mA |
| Supply Voltage-Max (Vsup) | 6.5V |
| Supply Voltage-Min (Vsup) | 1.6V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +3.168V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Other |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.90 |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What is the monitored threshold voltage and accuracy of TPS3851G33SDRBT?
TPS3851G33SDRBT monitors a fixed 3.3 V threshold with a tight accuracy of ±1.5%, meaning the reset asserts reliably when the supply drops below approximately 3.25 V. This precision prevents false resets on stable rails while catching genuine undervoltage events before the processor enters an undefined state.
How does the integrated watchdog in TPS3851G33SDRBT improve system reliability compared to a standalone supervisor?
By combining a voltage supervisor and a watchdog timer in a single 8-pin SON package, TPS3851G33SDRBT eliminates the need for a separate watchdog IC, saving board space of roughly 2 mm × 2 mm and reducing BOM cost. The watchdog generates a reset pulse if the processor fails to toggle the WDI pin within the programmed timeout window, typically 1.6 s or 6.3 s depending on configuration.
For a motor-drive controller PCB operating in a harsh environment, does TPS3851G33SDRBT meet the temperature requirement?
Yes, TPS3851G33SDRBT is rated for an operating temperature range of -40°C to +125°C, covering the full industrial and extended automotive ambient temperature envelope. This ensures the 3.3 V supervisor continues to function correctly in a motor controller enclosure subject to engine-bay heat soak or outdoor freeze cycles.
How many supply channels does TPS3851G33SDRBT monitor and what output does it provide on fault?
TPS3851G33SDRBT monitors 1 supply channel fixed at 3.3 V and asserts an active-low RESET output when the supply voltage falls below the threshold. The reset pulse remains asserted for a minimum reset timeout period—typically 200 ms—to ensure the microcontroller initialises correctly before the system resumes operation.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 10+ | $1.7000 | $17.00 |
| 25+ | $1.5512 | $38.78 |
| 100+ | $1.3872 | $138.72 |
| 250+ | $1.1900 | $297.50 |
| 500+ | $1.1400 | $570.00 |
| 2500+ | $1.0800 | $2700.00 |
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