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Texas Instruments TPS3824-50DBVT
- Part No.:
- TPS3824-50DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3824-50DBVT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,159
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Product details
Overview
TPS3824-50DBVT from Texas Instruments is a voltage supervisor IC with integrated watchdog timer, designed for 5V supply rail monitoring in microcontroller-based systems. It provides active-low and active-high reset outputs, 4.55V threshold voltage (VIT−), 1.6s watchdog timeout, 200ms reset delay, and draws only 15μA typical supply current. It operates across −40°C to 85°C in portable and industrial embedded control applications.
For engineers reviewing the TPS3824-50DBVT datasheet, TPS3824-50DBVT pinout, TPS3824-50DBVT application, or TPS3824-50DBVT equivalent, key selection criteria include its dual-reset-output capability, fixed 5V supervision threshold, watchdog timer compatibility with microcontroller WDI signaling, and SOT-23-5 package constraints for space-constrained PCB layouts.
Technical Context
The TPS3824-50DBVT implements a precision bandgap-based voltage reference and comparator to monitor VDD against a factory-trimmed 4.55V threshold (±30mV hysteresis). Its internal watchdog timer triggers reset if the WDI input fails to toggle within 1.6s, and its dual-output architecture delivers both push-pull RESET (active-low) and RESET (active-high) signals simultaneously.
Reset assertion occurs when VDD falls below VIT− or when MR is pulled low; recovery requires VDD to exceed VIT− + VHYS, followed by a fixed 200ms delay before output deassertion. The device requires no external components and supports manual reset forcing independent of supply voltage state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Threshold | 4.55V (VIT−, nominal); ensures reliable 5V rail supervision with ±9mV variation over temperature |
| Reset Delay Time | 200ms (fixed); guarantees sufficient system initialization time after power-up or brownout recovery |
| Watchdog Timeout | 1.6s (typical); provides fail-safe recovery window for firmware hangs in microcontroller applications |
| Supply Current | 15μA (typical); enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| Operating Temperature | −40°C to 85°C; validated for industrial and commercial embedded environments without derating |
| Output Drive | Push-pull RESET and RESET; eliminates need for external pull-up resistors in most logic interface scenarios |
| Hysteresis | 50mV; prevents output oscillation during slow or noisy VDD transitions near threshold |
Pinout & Package
TPS3824-50DBVT is housed in a 5-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for high-density PCB layouts and reflow-compatible assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 5) | Power supply input and monitored rail | Supplies device operation and serves as the primary voltage source under supervision (1.1V–5.5V range) |
| GND (Pin 2) | Ground reference | Provides return path for all internal circuitry and establishes 0V reference for threshold comparison |
| RESET (Pin 1) | Active-low reset output | Push-pull output asserted low during fault conditions; directly drives microcontroller /RESET pins without external pull-up |
| RESET (Pin 3) | Active-high reset output | Complementary push-pull output asserted high during fault; enables direct interface with logic requiring active-high reset signaling |
| WDI (Pin 4) | Watchdog timer input | Accepts falling-edge-triggered pulses; failure to toggle within 1.6s forces reset; internally pulsed if left floating |
Key Features
| Feature | Design Value |
|---|---|
| Dual active reset outputs | Simultaneous push-pull RESET (active-low) and RESET (active-high) eliminate level-shifting or logic inversion in mixed-signal systems |
| Fixed 5V supervision threshold | Factory-trimmed 4.55V (VIT−) with 50mV hysteresis ensures precise, zero-calibration 5V rail monitoring |
| Integrated watchdog timer | 1.6s timeout period detects firmware lockups without requiring external timing components or MCU resource allocation |
| Manual reset input support | MR pin absent in TPS3824 - simplifies design by removing unused control line and associated PCB routing |
| Ultra-low quiescent current | 15μA typical IDD enables use in always-on subsystems and extends battery life in portable equipment |
Applications
| Microcontroller Power-Up Sequencing | Industrial PLC I/O Module Supervision |
|---|---|
Use Scenario: Ensuring deterministic boot sequence for ARM Cortex-M or MSP430 microcontrollers after cold start or brownout. IC Role / Device Role / Timing Role: Voltage supervisor asserting both active-low and active-high reset signals for multi-rail SoC initialization and peripheral enable coordination. Use Value: 200ms fixed delay guarantees full core and memory stabilization before release; dual outputs simplify interface to legacy and modern reset architectures. | Use Scenario: Monitoring 5V auxiliary supply in programmable logic controller backplane modules exposed to electrical noise and thermal cycling. IC Role / Device Role / Timing Role: Fault-detection node providing watchdog-triggered reset and voltage-threshold violation signaling to main controller via isolated digital inputs. Use Value: 50mV hysteresis prevents chatter on noisy 5V rails; −40°C to 85°C rating ensures reliability across industrial ambient ranges without derating. |
| Battery-Powered Wireless Sensor Node | Desktop/Notebook System Management |
Use Scenario: Maintaining system integrity in LoRaWAN or BLE edge sensors powered by coin-cell or Li-ion batteries with variable discharge profiles. IC Role / Device Role / Timing Role: Low-power supervisor enabling wake-up reset coordination and watchdog supervision of sleep/wake firmware states. Use Value: 15μA supply current minimizes standby drain; 1.6s watchdog timeout aligns with typical sensor polling intervals without excessive overhead. | Use Scenario: Providing secondary reset supervision for chipset voltage rails (e.g., PCH 5V_STBY) in desktop motherboards and thin-client platforms. IC Role / Device Role / Timing Role: Redundant supervisor augmenting platform controller hub reset logic with independent 5V rail validation and watchdog coverage. Use Value: Dual RESET/RESET outputs interface natively with both legacy southbridge reset inputs and modern EC-controlled reset distribution networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-50DBVT | Single active-low RESET output; identical 4.55V threshold, 200ms delay, and 1.6s watchdog | Lacks active-high RESET output; requires external inverter or logic for active-high reset interface | Select when only one reset polarity is needed and board space or BOM count optimization is critical |
| TPS3825-50DBVT | Includes MR (manual reset) input; otherwise matches TPS3824-50DBVT in threshold, delay, watchdog, and dual outputs | Supports external hardware reset initiation (e.g., front-panel button), adding system-level control not available in TPS3824-50DBVT | Select when field-serviceable manual reset capability is required alongside dual-output supervision |
Compared with TPS3823-50DBVT and TPS3825-50DBVT, the TPS3824-50DBVT uniquely delivers dual-polarity reset outputs without manual reset functionality-making it optimal for designs needing simplified reset signaling to heterogeneous logic families while excluding MR complexity.
Availability
TPS3824-50DBVT is available at Aetrix Electronics and suitable for microcontroller power sequencing, industrial PLC supervision, battery-powered wireless sensors, and desktop system management requiring stable component supply and long-term production continuity.
Supply support for TPS3824-50DBVT includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies with over 50 years of innovation in industrial, automotive, and consumer electronics.
The TPS382x product line was developed to deliver compact, low-power, feature-rich voltage supervisors for processor-based systems-emphasizing precision threshold accuracy, integrated watchdog functionality, and flexible reset output configurations for robust system initialization.
FAQ
What is the exact supply voltage threshold for TPS3824-50DBVT?
The TPS3824-50DBVT has a nominal negative-going input threshold voltage (VIT−) of 4.55V, with a guaranteed range of 4.49V to 4.64V over −40°C to 85°C. This fixed threshold is factory-trimmed and requires no external components, making it ideal for precise 5V rail supervision in the TPS3824-50DBVT application.
Does TPS3824-50DBVT support both active-high and active-low reset outputs?
Yes, the TPS3824-50DBVT provides two independent reset outputs: RESET (Pin 1) is active-low push-pull, and RESET (Pin 3) is active-high push-pull. This dual-output capability allows direct interfacing with diverse microcontroller reset inputs and eliminates the need for external inverters or pull-up resistors in the TPS3824-50DBVT design.
What is the watchdog timeout period for TPS3824-50DBVT?
The TPS3824-50DBVT features a watchdog timeout (ttout) of 1.6 seconds (typical), with a guaranteed range of 0.9s to 2.5s over temperature. This timeout is triggered if the WDI pin (Pin 4) remains static beyond the interval, ensuring reliable detection of firmware hangs in systems using the TPS3824-50DBVT as a safety monitor.
Is manual reset (MR) available on TPS3824-50DBVT?
No, the TPS3824-50DBVT does not include a manual reset (MR) input. Unlike TPS3823-50DBVT or TPS3825-50DBVT, this variant omits the MR pin-simplifying layout and reducing external component count where hardware-initiated reset is unnecessary in the TPS3824-50DBVT implementation.
What package type and dimensions does TPS3824-50DBVT use?
The TPS3824-50DBVT is packaged in a 5-pin SOT-23 (DBV) case with nominal body dimensions of 2.90mm × 1.60mm. This surface-mount package supports standard reflow soldering, enables high-density PCB placement, and is fully compatible with automated assembly processes used in volume production of the TPS3824-50DBVT.
TPS3824-50DBVT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Programmable:
- Not Verified
- Type:
- Simple Reset/Power-On Reset
- Number of Voltages Monitored:
- 1
- Voltage - Threshold:
- 4.55V
- Output:
- Push-Pull, Totem Pole
- Reset:
- Active High/Active Low
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3824-50DBVT FAQ
1.How can I place an order for TPS3824-50DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3824-50DBVT on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TPS3824-50DBVT reliable?
The price and inventory of TPS3824-50DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3824-50DBVT is usually 5 days.
3.What payment methods are accepted for TPS3824-50DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3824-50DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3824-50DBVT?
TPS3824-50DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3824-50DBVT order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TPS3824-50DBVT?
For technical support, including TPS3824-50DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3824-50DBVT requirements.
6.How does Aetrix verify that TPS3824-50DBVT is sourced from the original manufacturer or authorized distributors?
All TPS3824-50DBVT products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TPS3824-50DBVT meets industry standards.
7.What is the process for return or replacement of TPS3824-50DBVT?
All TPS3824-50DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3824-50DBVT, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TPS3824-50DBVT part is unused and in its original packaging.
Return procedure for TPS3824-50DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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