TPS3840DL45DBVR Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
The TPS3840DL45DBVR is a nanopower, single-channel voltage supervisor IC with a fixed 4.5 V threshold, manual reset input, and programmable reset time delay, housed in a 5-pin SOT-23 package. It monitors supply rails at very low quiescent current, asserting an active-low reset output with user-configurable delay via an external capacitor. Suited for microcontroller reset circuits, industrial controllers, and high-input-voltage battery systems requiring robust power supervision.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- TPS3840DL45DBVR Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $0.3588(MOQ 100)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of TPS3840DL45DBVR?
- Nanopower quiescent current for minimal battery drain in always-on supervision
- Fixed 4.5 V undervoltage threshold with active-low reset output
- Programmable reset time delay set by a single external capacitor
- Manual reset input (MR pin) for hardware-initiated system resets
- Single-channel design in 5-pin SOT-23 (R-PDSO-G5) compact package
- Wide input voltage capability for high-voltage rail monitoring applications
- RoHS-compliant lead-free construction per JESD-609 e4
What is TPS3840DL45DBVR used for?
The TPS3840DL45DBVR is used in microcontroller and DSP reset circuits where a programmable reset delay is needed to allow internal oscillators and power rails to stabilize before the processor starts executing code. It is also deployed in industrial automation equipment monitoring 5 V or high-voltage supply rails, and in battery-backup systems where its nanopower consumption extends runtime of always-on supervisory circuits across automotive, consumer, and communications infrastructure applications.
What are the specifications of TPS3840DL45DBVR?
| Pbfree Code | Yes |
| Date Of Intro | 2019-07-16 |
| YTEOL | 15 |
| Additional Feature | BAT BUP SW:N;MNL RST:Y;OV DET:N;PW FL IP:N;PW FL IO:N;PW FL OP:N;PRG RST DLY:Y;UV DET:N;WD:N;WWD:N |
| 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 | SOP5,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Peak Reflow Temperature (Cel) | 260 |
| Supply Current-Max (Isup) | 0.0007mA |
| Supply Voltage-Max (Vsup) | 10V |
| Supply Voltage-Min (Vsup) | 1.5V |
| Supply Voltage-Nom (Vsup) | 4.5V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Threshold Voltage-Nom | +4.5V |
| 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 | Philippines |
Where can I find the TPS3840DL45DBVR datasheet?
TPS3840DL45DBVR Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for TPS3840DL45DBVR?
Compatible alternatives and drop-in replacements for TPS3840DL45DBVR:
Frequently Asked Questions
At what supply voltage does TPS3840DL45DBVR assert its reset output, and how is the reset delay configured?
The TPS3840DL45DBVR asserts its active-low reset when the monitored supply falls below the fixed 4.5 V threshold. The reset release delay is programmable by connecting a single external capacitor to the CT pin; a larger capacitor produces a longer delay, typically ranging from tens of milliseconds to several hundred milliseconds, ensuring sufficient settling time for the system before the MCU resumes operation.
How does the manual reset pin on TPS3840DL45DBVR assist during system debugging or board bring-up?
The manual reset (MR) pin allows an engineer or external logic to force a system reset at any time, independent of the monitored supply voltage. During board bring-up, pulling MR low issues an immediate reset pulse to the microcontroller, which is useful for verifying boot sequences, testing watchdog behavior, or recovering from firmware hang states without interrupting the power rail.
Why is TPS3840DL45DBVR described as nanopower, and how does that benefit battery-backed industrial systems?
The TPS3840DL45DBVR operates at nanopower quiescent current levels—typically in the sub-microampere range—meaning the supervisory circuit draws negligible current from the monitored supply. In battery-backed industrial controllers where the supervisor must remain active 24/7, this extremely low current draw extends backup battery life from months to years, reducing maintenance costs and improving system availability.
Which package does TPS3840DL45DBVR use, and how many external passive components does a typical application require?
The TPS3840DL45DBVR is housed in a 5-pin SOT-23 package with a small 2.9 mm × 1.6 mm footprint. A minimal application needs only 1 external capacitor on the CT pin to set the reset delay, plus optional bypass capacitors. This low component count simplifies PCB layout and reduces BOM cost in high-density designs like wearables, IoT modules, and compact industrial controllers.
When should a designer select TPS3840DL45DBVR over an adjustable-threshold supervisor for a 4.5 V monitored rail?
A fixed-threshold supervisor like the TPS3840DL45DBVR eliminates the 2 resistors needed to set an adjustable threshold, reducing component count and board area. For systems where the monitored rail is permanently 4.5 V and no threshold trimming is needed, using the fixed variant also removes the tolerance stack-up from external resistors—improving overall accuracy to within the IC's specified threshold tolerance of typically ±1.5% or better.
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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 |
|---|---|---|
| 100+ | $0.5640 | $56.40 |
| 250+ | $0.4306 | $107.66 |
| 500+ | $0.4120 | $206.02 |
| 1000+ | $0.3967 | $396.73 |
| 9000+ | $0.3639 | $3275.37 |
| 15000+ | $0.3588 | $5382.00 |
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