TPS3809I50DBVT Texas Instruments Integrated Circuit (SOT23 (3-Pin)) In Stock
TPS3809I50DBVT is a single-channel voltage supervisor from Texas Instruments with a fixed 4.55 V reset threshold and active-low push-pull output. It monitors system supply rails and asserts RESET within microseconds of an undervoltage event. Available in the compact SOT-23 3-pin package with worldwide stock and fast shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (3-Pin)
- Pin Count
- 3
- Lifecycle
- ACTIVE
- Datasheet
- TPS3809I50DBVT Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4500(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPS3809I50DBVT?
- Fixed 4.55 V reset threshold with tight accuracy monitors 5 V supply rails without any external resistors or adjustments
- Active-low push-pull reset output directly drives microcontroller or logic reset pins without an external pull-up resistor
- Ultra-compact SOT-23 (3-pin) package consumes minimal PCB area, ideal for space-constrained consumer and industrial designs
What is TPS3809I50DBVT used for?
The TPS3809I50DBVT is designed for microcontroller-based systems that require reliable power-on reset and brownout detection on a 5 V rail, ensuring the processor does not execute corrupted code during supply transients. Industrial control panels and handheld instruments use this supervisor to hold the MCU in reset when the supply dips below 4.55 V, preventing erratic behavior during power cycling. Its tiny SOT-23 footprint and single-supply operation also make it a cost-effective keep-alive supervisor in battery-powered IoT devices transitioning between power states.
What are the specifications of TPS3809I50DBVT?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Additional Feature | RESET THRESHOLD VOLTAGE IS 4.55V |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G3 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TO-236 |
| 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) | 5V |
| 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 | +4.55V |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| ## TPS3809I50DBVT Alternates Showing results | Image |
| Package | SOT23 (3-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, Taiwan |
Where can I find the TPS3809I50DBVT datasheet?
TPS3809I50DBVT Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS3809I50DBVT?
Compatible alternatives and drop-in replacements for TPS3809I50DBVT:
suggested
suggested
suggested
suggested
Frequently Asked Questions
What is the fixed reset threshold voltage of the TPS3809I50DBVT and how precisely does it trip?
The TPS3809I50DBVT has a factory-set reset threshold of 4.55 V with a typical accuracy of ±2%, so the RESET output asserts when VCC falls below approximately 4.46 V to 4.64 V. This tight window reliably protects 5 V microcontroller systems from executing code under an unsafe supply voltage without requiring any external threshold-setting resistors.
How does the active-low push-pull output of the TPS3809I50DBVT simplify MCU reset circuit design?
Because the RESET pin is push-pull rather than open-drain, it actively drives both logic-low during a fault and logic-high when the supply is healthy, eliminating the need for an external pull-up resistor. This reduces the BOM to a single 3-pin SOT-23 device and ensures fast rise times on the reset line, important for MCUs with reset pin timing requirements under 1 µs.
Which applications are best served by the TPS3809I50DBVT compared to an adjustable-threshold supervisor?
Systems that always run from a regulated 5 V rail and need lowest-cost, smallest-footprint supervision benefit most from the fixed-threshold TPS3809I50DBVT versus an adjustable device. Examples include PLC digital I/O modules, 5 V CAN bus nodes, and point-of-sale terminals where the supply voltage never changes and a fixed 4.55 V trip point matches the 5 V rail tolerance window without any resistor tuning.
How does the SOT-23 package size of the TPS3809I50DBVT compare with larger supervisor packages for dense PCB layouts?
The 3-pin SOT-23 (JESD-30 R-PDSO-G3) package measures only 2.9 mm x 1.6 mm, occupying roughly 4.6 mm2 of board area versus 8-pin SOIC packages that require over 30 mm2. For handheld instruments or wearable designs with less than 20 mm2 of spare area near the power supply, the SOT-23 supervisor integrates cleanly without impacting adjacent component clearances.
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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.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.9700 | $0.97 |
| 5+ | $0.8100 | $4.05 |
| 10+ | $0.7400 | $7.40 |
| 25+ | $0.4500 | $11.25 |
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