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Texas Instruments TPS3824-50DBVTG4
- Part No.:
- TPS3824-50DBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3824-50DBVTG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,743
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Product details
Overview
TPS3824-50DBVTG4 from Texas Instruments is a 5-pin SOT-23 voltage supervisor IC with integrated watchdog timer, active-high and active-low reset outputs, 4.55 V negative-going threshold (VIT−), 1.6 s watchdog timeout, and 200 ms reset delay. It monitors 5 V supply rails in microcontroller-based systems to ensure reliable power-on initialization and fault recovery.
For engineers reviewing the TPS3824-50DBVTG4 datasheet, TPS3824-50DBVTG4 pinout, TPS3824-50DBVTG4 application, or TPS3824-50DBVTG4 equivalent, this page delivers verified electrical specifications, functional pin roles, real-world use cases in DSP/microcontroller supervision, and validated alternative parts for design continuity and sourcing flexibility.
Technical Context
The TPS3824-50DBVTG4 implements a fixed-threshold supervision architecture with internal voltage divider setting VIT− = 4.55 V (typ) and hysteresis of 50 mV. Its dual-reset output structure-push-pull active-low RESET and push-pull active-high RESET-enables direct interface with both legacy and modern processor reset inputs without external logic.
Watchdog functionality relies on edge-triggered WDI input detection; a falling edge clears the 1.6 s timeout counter, while absence of transitions triggers reset assertion. The device operates across −40°C to 85°C with 15 µA typical supply current and requires no external components for basic supervision.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VIT− Threshold | 4.55 V (typ), ±30 mV tolerance - precisely supervises 5 V rails with margin against brownout |
| Watchdog Timeout | 1.6 s (typ), 0.9–2.5 s range - provides robust software fault detection interval for embedded firmware |
| Reset Delay (td) | 200 ms (typ), 120–300 ms range - ensures stable power-up before releasing processor from reset |
| Supply Current (IDD) | 15 µA (typ), ≤25 µA max - enables ultra-low-power operation in battery-backed or energy-sensitive systems |
| Output Drive | Push-pull RESET and RESET - eliminates need for external pull-up resistors, supports direct MCU reset pin drive |
| Input Hysteresis | 50 mV - prevents chatter during slow or noisy VDD transitions near threshold |
| Operating Temp | −40°C to +85°C - qualified for industrial and commercial embedded environments |
Pinout & Package
TPS3824-50DBVTG4 uses a 5-pin SOT-23 (DBV) package with nominal body size 2.90 mm × 1.60 mm and standard lead pitch.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low push-pull output | Drives low to assert reset on microcontrollers requiring active-low reset input; sinks up to 3 mA |
| 2: GND | Ground reference | Return path for all internal circuitry and output drivers; must be connected to system ground plane |
| 3: MR | Manual reset input | Active-low input; pulling low forces immediate reset regardless of VDD or watchdog state |
| 4: WDI | Watchdog timer input | Falling-edge sensitive; must be toggled within 1.6 s to prevent watchdog timeout and reset assertion |
| 5: VDD | Supply and monitored rail | Powers device and serves as supervised voltage source; operates from 1.1 V to 5.5 V |
Key Features
| Feature | Design Value |
|---|---|
| Dual reset outputs | Simultaneous active-low RESET and active-high RESET enable compatibility with diverse processor families without level-shifting |
| Integrated watchdog timer | 1.6 s timeout with edge-triggered WDI input eliminates need for external timing components or firmware polling overhead |
| No external components required | Fixed internal threshold and hysteresis allow drop-in placement; bypass capacitor only needed at VDD per best practice |
| Low quiescent current | 15 µA typical consumption extends battery life in portable equipment and reduces thermal load in dense PCB layouts |
| Industrial temperature range | −40°C to +85°C operation supports deployment in factory automation, networking, and outdoor electronics |
Applications
| Microcontroller Power-Up Supervision | Wireless Modem Reset Management |
|---|---|
|
Use Scenario: Ensures MSP430 or similar MCU exits reset only after 5 V rail stabilizes above 4.55 V and remains valid for 200 ms. IC Role / Device Role / Timing Role: Voltage supervisor with programmable delay and dual-output logic drives both active-low and active-high reset pins on mixed-architecture processors. Use Value: Prevents premature MCU execution during power ramp, eliminating boot failures and memory corruption in field-deployed devices. |
Use Scenario: Monitors 5 V supply in LTE/Wi-Fi modules and asserts reset if firmware hangs or fails to service watchdog within 1.6 s. IC Role / Device Role / Timing Role: Fault-detection supervisor with edge-triggered watchdog input and manual reset override for remote recovery. Use Value: Enables autonomous recovery from software lockups without host intervention, improving modem uptime and reducing service calls. |
| Industrial PLC I/O Module Monitoring | Notebook System Power Sequencing |
|
Use Scenario: Supervises auxiliary 5 V rail powering isolated digital I/O circuits in programmable logic controllers. IC Role / Device Role / Timing Role: Dual-output supervisor interfaces directly with FPGA configuration logic (active-high) and microcontroller watchdog (active-low). Use Value: Guarantees synchronized power sequencing and fault containment across safety-critical control paths. |
Use Scenario: Validates main 5 V system rail before enabling CPU VRM and peripheral power domains in portable computing platforms. IC Role / Device Role / Timing Role: High-accuracy threshold supervisor with 50 mV hysteresis rejects transient noise on shared power planes. Use Value: Eliminates false resets caused by load-switching transients, improving boot reliability and user experience. |
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 | Identical 4.55 V threshold and 1.6 s watchdog, but active-low only (no RESET) | Requires external inverter or MCU with active-low-only reset input | Select when board space is constrained and active-high reset is unnecessary |
| TPS3825-50DBVT | Same dual-output structure and 4.55 V threshold, but includes manual reset (MR) pin | Enables hardware-initiated reset independent of VDD or watchdog state | Choose when system-level diagnostics require operator-triggered reset capability |
Compared with TPS3823-50DBVT, TPS3824-50DBVTG4 adds active-high RESET for direct interface with newer processors; compared with TPS3825-50DBVT, it omits MR to reduce pin count while retaining identical supervision and watchdog performance.
Availability
TPS3824-50DBVTG4 is available at Aetrix Electronics and suitable for microcontroller supervision, wireless modem fault recovery, and industrial PLC power monitoring requiring stable component supply, long-term lifecycle support, and guaranteed traceability.
Supply support for TPS3824-50DBVTG4 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 for industrial, automotive, and communications markets.
The TPS382x product line was designed specifically for reliable power-on reset generation and runtime fault supervision in DSP, microcontroller, and microprocessor systems operating from fixed 2.5 V to 5 V rails.
FAQ
What is the exact reset threshold voltage for TPS3824-50DBVTG4?
The TPS3824-50DBVTG4 has a negative-going input threshold voltage (VIT−) of 4.55 V (typical), with a guaranteed range of 4.46 V to 4.64 V across −40°C to +85°C. This value is factory-trimmed and fixed, enabling precise 5 V rail supervision without external resistor networks.
Does TPS3824-50DBVTG4 require external components to function?
No, the TPS3824-50DBVTG4 operates autonomously with no external components required for core supervision. A 0.1 µF ceramic bypass capacitor at VDD is recommended per TI design guidelines to suppress high-frequency noise and stabilize the internal reference.
How does the watchdog timer in TPS3824-50DBVTG4 operate?
The TPS3824-50DBVTG4 watchdog timer times out after 1.6 s (typical) if no falling edge occurs on the WDI pin. A detected falling edge resets the timer. If WDI floats, the device generates internal pulses to prevent spurious timeouts - a 1 kΩ pull-down disables this behavior if deterministic WDI control is required.
Can TPS3824-50DBVTG4 drive both active-low and active-high reset inputs simultaneously?
Yes, TPS3824-50DBVTG4 provides concurrent push-pull RESET (active-low) and RESET (active-high) outputs. This allows direct connection to MCUs or FPGAs that accept either logic polarity - eliminating level shifters, inverters, or board redesign when migrating between processor families.
What is the maximum supply voltage the TPS3824-50DBVTG4 can monitor?
The TPS3824-50DBVTG4 monitors supply voltages up to 5.5 V (absolute maximum rating), with specified operation from 1.1 V to 5.5 V. Its 4.55 V threshold makes it optimized for 5 V systems, and its internal architecture ensures accurate supervision even with moderate VDD ripple or slow ramp rates.
TPS3824-50DBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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
TPS3824-50DBVTG4 FAQ
1.How can I place an order for TPS3824-50DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3824-50DBVTG4 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 TPS3824-50DBVTG4 reliable?
The price and inventory of TPS3824-50DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3824-50DBVTG4 is usually 5 days.
3.What payment methods are accepted for TPS3824-50DBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3824-50DBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3824-50DBVTG4?
TPS3824-50DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3824-50DBVTG4 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 TPS3824-50DBVTG4?
For technical support, including TPS3824-50DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3824-50DBVTG4 requirements.
6.How does Aetrix verify that TPS3824-50DBVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS3824-50DBVTG4 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 TPS3824-50DBVTG4 meets industry standards.
7.What is the process for return or replacement of TPS3824-50DBVTG4?
All TPS3824-50DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3824-50DBVTG4, 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 TPS3824-50DBVTG4 part is unused and in its original packaging.
Return procedure for TPS3824-50DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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