TPS3823-33DBVR Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The TPS3823-33DBVR is a voltage supervisor with integrated watchdog timer and manual reset by Texas Instruments, monitoring a 3.3 V rail in a tiny 5-pin SOT-23 package. It asserts a reset signal when supply voltage drops below threshold. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TPS3823-33DBVR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.4200(MOQ 1)
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Fixed 3.3 V threshold monitoring with precise reset assertion keeps microcontrollers in a safe state during power-supply droops
- Integrated watchdog timer with programmable timeout detects software lockups and triggers a system reset without external components
- Manual reset input pin enables hardware-initiated resets from a push-button or host processor in debug and production test scenarios
- Ultra-compact 5-pin SOT-23 package occupies under 5 mm² of PCB area, ideal for space-constrained embedded and wearable designs
Applications
The TPS3823-33DBVR is used to supervise 3.3 V microcontroller and DSP power rails in industrial controllers, automotive telematics, and consumer electronics where reliable power-on reset is critical. The built-in watchdog timer adds a second layer of fault protection, automatically restarting firmware that has stalled without requiring an external timer IC. Its tiny SOT-23 footprint and single-supply operation make it a drop-in solution for battery-powered IoT devices and handheld instruments.
Specifications
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustable Threshold | NO |
| Analog IC - Other Type | VOLTAGE SUPERVISOR/RESET IC |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Number of Channels | 1 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5/6,.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) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.1V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| 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 (5-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, Malaysia, Philippines |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What voltage threshold does the TPS3823-33DBVR monitor, and how quickly does it assert reset after a supply drop?
The TPS3823-33DBVR is factory-trimmed to assert an active-low reset when the monitored 3.3 V supply falls below approximately 3.08 V (93% of nominal). The reset output is held asserted for a minimum 200 ms delay after the supply recovers above threshold, giving decoupling capacitors and regulators time to stabilize before the microcontroller exits reset.
How does the integrated watchdog in the TPS3823-33DBVR compare to implementing a software watchdog timer in a bare-metal MCU application?
A software-only watchdog depends on the CPU itself being functional and cannot detect a hard lockup caused by stack corruption or a stuck interrupt at the hardware level. The TPS3823-33DBVR's external hardware watchdog with a dedicated timeout period (selectable in the 100 ms to 1.6 s range depending on the variant) provides independent fault detection, asserting a 200 ms reset pulse that reboots the MCU even when the on-chip watchdog peripheral has been disabled by runaway code.
For a compact 3.3 V embedded design, how many external passive components does the TPS3823-33DBVR require?
In the most basic configuration—supply supervision with watchdog and manual reset—the TPS3823-33DBVR requires only a 100 nF bypass capacitor on its VDD pin and a pull-up resistor of approximately 10 kΩ on the open-drain RESET output. That totals just 2 external passives, compared with 5 to 8 components in a discrete comparator-based reset circuit, saving board area and simplifying schematic review.
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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.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.9430 | $0.94 |
| 100+ | $0.5550 | $55.50 |
| 250+ | $0.4800 | $120.00 |
| 500+ | $0.4200 | $210.00 |
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