TPS3805H33DCKR Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The TPS3805H33DCKR is a dual-channel voltage supervisor IC monitoring supply rails from 0 V to 6.3 V with an adjustable threshold and active-low reset output. It operates in a compact 5-pin SC-70 package and targets 3.3 V systems requiring reliable power-on reset and undervoltage detection. Suitable for microcontroller reset circuits, battery-powered devices, and multi-rail power sequencing in space-constrained designs.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TPS3805H33DCKR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.5978(MOQ 195)
- 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 TPS3805H33DCKR?
- Dual-channel voltage supervision covering 0 V to 6.3 V input range
- Adjustable undervoltage threshold for flexible system design
- Active-low reset output for direct connection to MCU reset pins
- Ultra-compact 5-pin SC-70 (SOT-23) package minimizes board footprint
- RoHS-compliant lead-free construction per JESD-609 e4
- Optimized for 3.3 V rail monitoring in embedded systems
What is TPS3805H33DCKR used for?
The TPS3805H33DCKR is used in microcontroller and microprocessor reset circuits to ensure clean power-on reset and brownout detection on 3.3 V supply rails. It is also deployed in battery-powered portable devices where reliable undervoltage detection prevents data corruption during low-battery conditions, and in multi-rail industrial designs requiring compact, dual-channel power supervision without discrete reset components.
What are the specifications of TPS3805H33DCKR?
| Pbfree Code | Yes |
| YTEOL | 15 |
| Adjustable Threshold | YES |
| Analog IC - Other Type | VOLTAGE DETECTOR |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Number of Channels | 2 |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSSOP5/6,.08 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, THIN PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 0.006mA |
| Supply Voltage-Max (Vsup) | 6V |
| Supply Voltage-Min (Vsup) | 1.3V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold/Silver (Ni/Pd/Au/Ag) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +3.05V |
| 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 |
Where can I find the TPS3805H33DCKR datasheet?
TPS3805H33DCKR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS3805H33DCKR?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many supply rails can TPS3805H33DCKR monitor simultaneously, and what voltage range does it cover?
The TPS3805H33DCKR monitors 2 independent voltage channels and accepts input voltages from 0 V to 6.3 V, covering common 1.8 V, 2.5 V, 3.3 V, and 5 V supply rails. Its adjustable threshold lets designers set the exact trip point for each rail without external resistor dividers in some configurations, simplifying board layout.
Which package does TPS3805H33DCKR come in, and how does its size benefit compact PCB layouts?
The TPS3805H33DCKR is housed in a 5-pin SC-70 package, one of the smallest SOT-23-style outlines available, measuring approximately 2.0 mm × 1.25 mm. This tiny footprint allows placement adjacent to the MCU reset pin with minimal routing, important in wearable, IoT, and handheld devices where every square millimeter of PCB space is critical.
Can TPS3805H33DCKR replace a discrete RC reset circuit in a 3.3 V microcontroller design?
Yes. The TPS3805H33DCKR generates a precise active-low reset pulse whenever the monitored supply falls below the set threshold, which is typically around 3.3 V for this variant. Unlike a simple RC circuit, it provides a guaranteed reset timeout period and monitors voltage actively, eliminating the timing inaccuracies and temperature drift that affect passive RC reset networks.
What type of output does TPS3805H33DCKR use, and how should it be connected to a host MCU?
The TPS3805H33DCKR provides an active-low open-drain or push-pull reset output (RESET pin) that connects directly to the RESET or NRST pin of a microcontroller. A pull-up resistor of typically 10 kΩ to 100 kΩ is recommended when using an open-drain output configuration. The output remains asserted low for the programmed timeout period after the supply recovers above the 3.3 V threshold.
For a battery-operated IoT sensor, why might TPS3805H33DCKR be preferable to a software watchdog reset alone?
A software watchdog cannot detect supply voltage collapses below 3.3 V that freeze the CPU before it can kick the watchdog. TPS3805H33DCKR monitors the hardware supply rail continuously, asserting reset as soon as the voltage drops below threshold—even if firmware has crashed—ensuring the system restarts reliably after a brownout without any software intervention.
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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
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| 195+ | $1.0512 | $204.98 |
| 250+ | $0.6978 | $174.44 |
| 500+ | $0.6699 | $334.94 |
| 1000+ | $0.6579 | $657.90 |
| 6000+ | $0.6048 | $3628.56 |
| 9000+ | $0.5978 | $5380.29 |
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