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Texas Instruments TPS3825-50DBVTG4
- Part No.:
- TPS3825-50DBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3825-50DBVTG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,316
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Product details
Overview
TPS3825-50DBVTG4 from Texas Instruments is a 5-pin SOT-23 voltage supervisor IC with active-low and active-high reset outputs, 4.55 V negative-going threshold (VIT−), 200 ms reset delay, watchdog timer timeout of 1.6 s, and 15 µA typical supply current. It monitors 5 V supply rails in microcontroller-based systems requiring reliable power-on reset and fault recovery.
For engineers reviewing the TPS3825-50DBVTG4 datasheet, TPS3825-50DBVTG4 pinout, TPS3825-50DBVTG4 application, or TPS3825-50DBVTG4 equivalent, key selection criteria include dual-reset logic support, manual reset input compatibility, watchdog timer timing accuracy across −40°C to 85°C, and push-pull output drive capability for direct interfacing with MSP430 or ARM Cortex-M reset inputs.
Technical Context
The TPS3825-50DBVTG4 implements a fixed-threshold supervision architecture with internal voltage divider setting VIT− = 4.55 V (nominal) and hysteresis of 50 mV. Its dual-output structure provides simultaneous active-low RESET and active-high RESET signals, enabling flexible reset signaling without external inverters.
Watchdog functionality relies on edge-triggered WDI input detection with 1.6 s timeout; reset assertion persists for 200 ms after timeout or MR activation. The device operates from 1.1 V to 5.5 V and requires no external components for basic supervision, supporting immediate integration into space-constrained embedded designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - powers device and enables monitoring of 5 V rails down to brownout conditions |
| Negative-GOing Threshold (VIT−) | 4.49 V to 4.64 V - precise 5 V rail supervision with ±1.5% tolerance over temperature |
| Reset Delay Time (td) | 120 ms to 300 ms - ensures stable microcontroller initialization before release from reset |
| Watchdog Timeout (ttout) | 0.9 s to 2.5 s - configurable system-level fault detection window for firmware hang recovery |
| Supply Current (IDD) | 15 µA typical - ultra-low quiescent consumption suitable for battery-backed applications |
| Output Type | Push-pull RESET and RESET - eliminates need for external pull-up resistors in most host interfaces |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded control and communications equipment |
Pinout & Package
TPS3825-50DBVTG4 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 reset output | Push-pull driver asserts low during power-up, brownout, watchdog timeout, or MR activation |
| 2: GND | Ground reference | Common return path for all internal circuitry and output stages |
| 3: MR | Manual reset input | Active-low signal forces reset regardless of VDD level; internal 90 kΩ pullup when unconnected |
| 4: RESET | Active-high reset output | Complementary push-pull output synchronized with RESET; enables direct interface to active-high reset domains |
| 5: VDD | Supply and sense input | Powers device and serves as monitored rail; asserts reset if voltage falls below VIT− |
Key Features
| Feature | Design Value |
|---|---|
| Dual active reset outputs | Simultaneous RESET (active-low) and RESET (active-high) eliminate external logic for mixed-interface systems |
| Integrated watchdog timer | 1.6 s timeout detects firmware hangs without external timing components or MCU intervention |
| Manual reset input (MR) | Hardware-initiated reset via external button or logic signal, independent of supply voltage condition |
| Fixed 5 V threshold | VIT− = 4.55 V (nominal) with 50 mV hysteresis ensures robust immunity to supply ripple and noise |
| Low-power operation | 15 µA typical supply current extends battery life in portable and remote sensor applications |
Applications
| Microcontroller Power-Up Sequencing | Industrial PLC Reset Management |
|---|---|
Use Scenario: Ensuring deterministic startup of ARM Cortex-M4 microcontrollers after cold power application. IC Role / Device Role / Timing Role: Voltage supervisor generating 200 ms reset pulse synchronized to 5 V rail stabilization. Use Value: Prevents code execution before internal regulators and clocks stabilize, eliminating boot failures in factory automation controllers. |
Use Scenario: Maintaining fail-safe reset state in programmable logic controllers exposed to voltage transients on 24 V DC input rails. IC Role / Device Role / Timing Role: Dual-output supervisor asserting both active-low and active-high reset signals to FPGA and analog I/O ASICs. Use Value: Guarantees coordinated reset across heterogeneous subsystems during line disturbances, meeting IEC 61000-4-4 compliance requirements. |
| Wireless Sensor Node Supervision | Notebook System Supply Monitoring |
Use Scenario: Enabling reliable wake-from-sleep operation in LoRaWAN end-nodes powered by coin-cell batteries. IC Role / Device Role / Timing Role: Low-current (15 µA) supervisor with watchdog timer detecting firmware lockups during RF transmission. Use Value: Extends operational lifetime beyond 5 years while ensuring autonomous recovery from communication stack faults. |
Use Scenario: Validating 5 V auxiliary rail integrity in ultrabook platform controllers during AC/DC adapter transitions. IC Role / Device Role / Timing Role: Fixed-threshold monitor with 4.55 V trip point verifying USB-C PD negotiated voltages before enabling USB hub logic. Use Value: Prevents data corruption during dynamic power source switching by enforcing strict rail validation prior to peripheral enumeration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3824-50DBVT | Identical pinout, same 4.55 V threshold and 200 ms delay, but lacks manual reset (MR) input | Cannot support hardware-initiated reset via pushbutton or external logic signal | Select when MR functionality is unnecessary and cost optimization is prioritized |
| TPS3823-50DBVT | Same package and threshold, but provides only active-low RESET output (no RESET) | Requires external inverter or level-shifter to interface with active-high reset domains | Select when system design uses only one reset polarity and board area is constrained |
Compared with TPS3824-50DBVT and TPS3823-50DBVT, the TPS3825-50DBVTG4 uniquely delivers both dual-reset logic and manual reset in a single 5-pin SOT-23, reducing BOM count and PCB footprint while enabling full reset flexibility without redesign.
Availability
TPS3825-50DBVTG4 is available at Aetrix Electronics and suitable for industrial PLCs, wireless sensor nodes, notebook platform controllers, and microcontroller-based edge devices requiring stable component supply and long-term lifecycle assurance.
Supply support for TPS3825-50DBVTG4 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 company specializing in analog and embedded processing technologies, with leadership in power management, signal chain, and real-time control solutions.
The TPS382x family was designed specifically for robust power-on reset and watchdog supervision in DSP, microcontroller, and microprocessor systems-emphasizing low quiescent current, fixed-threshold accuracy, and minimal external component count.
FAQ
What is the exact reset threshold voltage for TPS3825-50DBVTG4?
The TPS3825-50DBVTG4 has a nominal negative-going input threshold voltage (VIT−) of 4.55 V, with guaranteed minimum and maximum values of 4.49 V and 4.64 V respectively across −40°C to +85°C. This fixed threshold is set by an internal resistor divider and requires no external calibration.
Does TPS3825-50DBVTG4 support both active-low and active-high reset outputs simultaneously?
Yes, TPS3825-50DBVTG4 provides two independent reset outputs: pin 1 (RESET) is active-low, and pin 4 (RESET) is active-high. Both outputs are push-pull and assert/deassert synchronously during power-up, brownout, watchdog timeout, or manual reset events.
What is the watchdog timeout duration for TPS3825-50DBVTG4?
The watchdog timeout (ttout) for TPS3825-50DBVTG4 is 1.6 s nominal, with a guaranteed range of 0.9 s to 2.5 s over temperature. The timer resets on each falling edge at the WDI pin and triggers reset if no transition occurs within this interval.
Can TPS3825-50DBVTG4 operate from a 3.3 V supply rail?
No - TPS3825-50DBVTG4 is specifically configured for 5 V rail supervision with VIT− = 4.55 V. For 3.3 V applications, use TPS3825-33DBVTG4 (VIT− = 2.93 V). Operating TPS3825-50DBVTG4 from 3.3 V would prevent reset assertion during undervoltage conditions.
Is the manual reset (MR) input of TPS3825-50DBVTG4 internally pulled up?
Yes, TPS3825-50DBVTG4 includes an internal 90 kΩ pullup resistor on the MR pin. When left unconnected or tied to VDD, MR remains inactive; pulling MR low (≤ 0.3 × VDD) forces immediate reset assertion for the full 200 ms delay period.
TPS3825-50DBVTG4 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
- Reset Timeout:
- 120ms Minimum
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
TPS3825-50DBVTG4 FAQ
1.How can I place an order for TPS3825-50DBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3825-50DBVTG4 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 TPS3825-50DBVTG4 reliable?
The price and inventory of TPS3825-50DBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3825-50DBVTG4 is usually 5 days.
3.What payment methods are accepted for TPS3825-50DBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3825-50DBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3825-50DBVTG4?
TPS3825-50DBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3825-50DBVTG4 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 TPS3825-50DBVTG4?
For technical support, including TPS3825-50DBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3825-50DBVTG4 requirements.
6.How does Aetrix verify that TPS3825-50DBVTG4 is sourced from the original manufacturer or authorized distributors?
All TPS3825-50DBVTG4 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 TPS3825-50DBVTG4 meets industry standards.
7.What is the process for return or replacement of TPS3825-50DBVTG4?
All TPS3825-50DBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3825-50DBVTG4, 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 TPS3825-50DBVTG4 part is unused and in its original packaging.
Return procedure for TPS3825-50DBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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