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Texas Instruments TPS3824-30DBVT
- Part No.:
- TPS3824-30DBVT
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3824-30DBVT.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,245
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Product details
Overview
TPS3824-30DBVT from Texas Instruments is a voltage supervisor IC with integrated watchdog timer, designed for supply rail monitoring and system reset generation in microcontroller-based applications. It features a fixed 3.0V threshold (VIT− = 2.59–2.69 V), 200ms reset delay, 1.6s watchdog timeout, active-low and active-high RESET outputs, and consumes only 15µA typical supply current. It operates across −40°C to 85°C in 5-pin SOT-23 package.
For engineers reviewing the TPS3824-30DBVT datasheet, TPS3824-30DBVT pinout, TPS3824-30DBVT application, or TPS3824-30DBVT equivalent, this page delivers verified functional specifications, validated pin roles, confirmed timing behavior (td = 200ms, ttout = 1.6s), exact threshold tolerance (±40mV), and real-world use context for embedded reset supervision.
Technical Context
The TPS3824-30DBVT implements dual-output supervision: an active-low push-pull RESET and an active-high push-pull RESET, both asserted when VDD falls below 2.59V or during manual reset/watchdog timeout. Its internal watchdog timer requires periodic WDI falling edges to prevent reset assertion, with a nominal timeout of 1.6 seconds.
Reset initiation occurs at VDD ≥ 1.1V; thereafter, the device monitors VDD against a precision internal voltage divider setting VIT−. Hysteresis (50mV) prevents chatter near threshold, and no external components are required for basic operation. The MR input forces reset independently of VDD or watchdog state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - supports operation during brown-out and enables use with low-voltage MCUs |
| Threshold Voltage (VIT−) | 2.59 V to 2.69 V - fixed 3.0V nominal sense point with ±40mV tolerance over temperature |
| Reset Delay (td) | 120 ms to 300 ms - ensures stable power-up before releasing reset to processor |
| Watchdog Timeout (ttout) | 0.9 s to 2.5 s - provides fail-safe recovery window for firmware hangs |
| Supply Current (IDD) | 15 µA typical - enables long battery life in portable and always-on systems |
| Output Type | Push-pull active-low RESET + push-pull active-high RESET - eliminates need for external pull-ups |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded environments |
Pinout & Package
TPS3824-30DBVT is housed in a 5-pin SOT-23 (DBV) package with nominal body size 2.90 mm × 1.60 mm. Pin functions are validated per TI SLVS165O Rev. MARCH 2025.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDD (Pin 5) | Power input & monitored rail | Supplies device and serves as the voltage source under supervision; asserts reset if drops below VIT− |
| GND (Pin 2) | Reference ground | Common return path for all internal circuitry and output drivers |
| RESET (Pin 1) | Active-low reset output | Push-pull driver; sinks current to hold MCU in reset until VDD stabilizes above threshold + hysteresis |
| RESET (Pin 3) | Active-high reset output | Push-pull driver; sources current to signal valid power condition to logic-level inputs requiring high-enable |
| WDI (Pin 4) | Watchdog input | Edge-sensitive input; falling edge resets watchdog timer; floating state triggers internal pulses to avoid false timeout |
Key Features
| Feature | Design Value |
|---|---|
| Dual active RESET outputs | Simultaneous push-pull active-low and active-high signals eliminate external level-shifting or pull-up resistors |
| Integrated watchdog timer | 1.6s timeout (min 0.9s, max 2.5s) detects firmware lockup without external RC network |
| Manual reset input (MR) | Pin 3 is MR on TPS3824 - allows external hardware reset independent of supply or watchdog state |
| No external components required | Fixed threshold, hysteresis, and timing set internally - reduces BOM count and layout area |
| Low quiescent current | 15µA typical IDD enables use in energy-constrained battery-powered systems |
Applications
| Microcontroller Power-Up Sequencing | Industrial PLC Reset Supervision |
|---|---|
Use Scenario: Ensuring reliable boot of an MSP430 or ARM Cortex-M MCU after cold start or brown-out event. IC Role / Device Role / Timing Role: Monitors 3.3V supply rail and holds RESET low until VDD exceeds 2.63V + 50mV hysteresis, then delays release for 200ms. Use Value: Prevents premature execution before power rails stabilize and clock sources lock - eliminates boot failures in noisy factory environments. | Use Scenario: Maintaining deterministic reset behavior in programmable logic controllers exposed to wide temperature swings and EMI. IC Role / Device Role / Timing Role: Provides dual-output reset signaling (active-low for legacy peripherals, active-high for modern FPGA configuration logic) with guaranteed −40°C to +85°C operation. Use Value: Eliminates need for separate reset buffers or voltage translators, reducing board space and qualification effort for industrial certifications. |
| Wireless Sensor Node Watchdog | Notebook System Supply Monitoring |
Use Scenario: Recovering from firmware hang in BLE or LoRaWAN end-node without host intervention. IC Role / Device Role / Timing Role: Watches WDI line for falling edges; triggers 200ms reset pulse if no transition occurs within 1.6s. Use Value: Enables autonomous recovery from stuck states while consuming only 15µA - extends multi-year battery life. | Use Scenario: Validating 3.0V auxiliary rail integrity during notebook sleep/wake transitions and thermal throttling events. IC Role / Device Role / Timing Role: Detects undervoltage on 3.0V LDO output and asserts both RESET and RESET to coordinate PMIC and EC reset sequencing. Use Value: Prevents corrupted memory writes or inconsistent state during partial power collapse - improves system reliability under dynamic load conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3823-30DBVT | Same 3.0V threshold and 200ms delay, but single active-low RESET output only - no active-high output | Suitable where only one reset polarity is needed; lacks dual-output flexibility of TPS3824-30DBVT | Select when board design uses only active-low reset logic and cost reduction is prioritized over output versatility |
| TPS3825-30DBVT | Identical threshold and timing, includes MR input and dual RESET outputs, but adds manual reset capability not present in TPS3824-30DBVT | Required where hardware-initiated reset (e.g., front-panel button) must coexist with watchdog supervision | Choose when system requires both watchdog and user-triggered reset - TPS3825-30DBVT provides MR on Pin 4 instead of WDI |
Compared with TPS3823-30DBVT, the TPS3824-30DBVT adds active-high RESET for direct interface with high-enable logic, while TPS3825-30DBVT replaces WDI with MR - making TPS3824-30DBVT optimal for watchdog-critical systems needing dual-polarity reset signaling without manual reset.
Availability
TPS3824-30DBVT is available at Aetrix Electronics and suitable for microcontroller boot sequencing, industrial PLC reset management, wireless sensor node watchdog recovery, and notebook auxiliary rail monitoring requiring stable component supply and full production traceability.
Supply support for TPS3824-30DBVT 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 leader delivering analog and embedded processing solutions, with over 90 years of innovation in power management, signal chain, and control technologies.
The TPS382x family was engineered specifically for robust, low-power supply supervision in DSP and microcontroller systems - emphasizing precision threshold accuracy, integrated watchdog functionality, and minimal external component count.
FAQ
What is the exact reset threshold voltage for TPS3824-30DBVT?
The TPS3824-30DBVT has a negative-going input threshold voltage (VIT−) of 2.59 V (min), 2.63 V (typ), and 2.69 V (max) across −40°C to +85°C. This corresponds to a nominal 3.0V supervision point with ±40mV tolerance, verified per TI SLVS165O electrical characteristics table.
Does TPS3824-30DBVT support both active-low and active-high reset outputs?
Yes, TPS3824-30DBVT provides two independent reset outputs: Pin 1 is active-low RESET (push-pull), and Pin 3 is active-high RESET (push-pull). This dual-output architecture eliminates external inverters or pull-up resistors when interfacing with mixed-signal systems requiring both polarities.
What is the watchdog timeout duration for TPS3824-30DBVT?
The watchdog timeout (ttout) for TPS3824-30DBVT is 0.9 s (min), 1.6 s (typ), and 2.5 s (max) at TA = 25°C. This interval is factory-trimmed and applies across the full operating temperature range, enabling reliable detection of firmware stalls without external timing components.
Is manual reset (MR) available on TPS3824-30DBVT?
No, TPS3824-30DBVT does not include a manual reset (MR) input. Pin 3 is assigned to the active-high RESET output. For MR functionality, consider TPS3825-30DBVT (MR on Pin 4) or TPS3823-30DBVT (MR on Pin 3, single RESET output).
What package type and pin count does TPS3824-30DBVT use?
TPS3824-30DBVT uses a 5-pin SOT-23 (DBV) package with nominal dimensions 2.90 mm × 1.60 mm. Pinout is validated per TI's Figure 5-2 (top view): Pin 1 = RESET (active-low), Pin 2 = GND, Pin 3 = RESET (active-high), Pin 4 = WDI, Pin 5 = VDD.
TPS3824-30DBVT 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:
- 2.63V
- 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
TPS3824-30DBVT FAQ
1.How can I place an order for TPS3824-30DBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3824-30DBVT 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 TPS3824-30DBVT reliable?
The price and inventory of TPS3824-30DBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3824-30DBVT is usually 5 days.
3.What payment methods are accepted for TPS3824-30DBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3824-30DBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3824-30DBVT?
TPS3824-30DBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3824-30DBVT 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 TPS3824-30DBVT?
For technical support, including TPS3824-30DBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3824-30DBVT requirements.
6.How does Aetrix verify that TPS3824-30DBVT is sourced from the original manufacturer or authorized distributors?
All TPS3824-30DBVT 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 TPS3824-30DBVT meets industry standards.
7.What is the process for return or replacement of TPS3824-30DBVT?
All TPS3824-30DBVT units undergo pre-shipment inspection (PSI). If there is an issue with TPS3824-30DBVT, 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 TPS3824-30DBVT part is unused and in its original packaging.
Return procedure for TPS3824-30DBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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