My Inquiry
My Account
Texas Instruments TPS3825-33DBVRG4
- Part No.:
- TPS3825-33DBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Supervisors
- Package:
- SC-74A, SOT-753
- Datasheet:
-
TPS3825-33DBVRG4.pdf
- Description:
- IC SUPERVISOR 1 CHANNEL SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,183
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TPS3825-33DBVRG4 from Texas Instruments is a 3.3V fixed-threshold voltage supervisor IC with active-low and active-high reset outputs, manual reset input (MR), watchdog timer input (WDI), 200ms reset delay, and 15μA typical supply current in a 5-pin SOT-23 package. It monitors microcontroller supply rails and ensures reliable power-on initialization and fault recovery in embedded systems.
For engineers reviewing the TPS3825-33DBVRG4 datasheet, TPS3825-33DBVRG4 pinout, TPS3825-33DBVRG4 application, or TPS3825-33DBVRG4 equivalent, key selection criteria include its dual-reset-output capability, 2.93V threshold with ±70mV hysteresis, push-pull output drive strength, MR/WDI timing compatibility with MSP430 and similar MCUs, and qualification for industrial temperature range (−40°C to 85°C).
Technical Context
The TPS3825-33DBVRG4 integrates a precision voltage reference, comparator with hysteresis, 200ms internal reset timer, and independent watchdog timer logic that triggers on WDI falling edges. Its dual-reset architecture provides simultaneous active-low (RESET) and active-high (RESET) signals for flexible interface with processors requiring either polarity.
It operates across 1.1V–5.5V supply range but is factory-trimmed for 3.3V supervision (VIT− = 2.93V typ), with threshold stability over −40°C to 85°C. The MR pin features an internal 90kΩ pullup and accepts standard CMOS logic levels, while WDI requires periodic transitions to prevent timeout-induced reset assertion.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.1 V to 5.5 V - supports operation during brownout and enables use with diverse MCU core/logic supplies. |
| Threshold Voltage (VIT−) | 2.86 V to 3.00 V at −40°C to 85°C - precise 3.3V rail monitoring with guaranteed margin against nominal 3.3V ±5% tolerance. |
| Reset Delay Time (td) | 120 ms to 300 ms - ensures sufficient hold time for processor initialization after VDD exceeds threshold + hysteresis. |
| Watchdog Timeout (ttout) | 1.6 s (typ) - provides robust system-level fault detection window for firmware hang scenarios. |
| Supply Current (IDD) | 15 μA (typ), 25 μA (max) - ultra-low quiescent power suitable for battery-backed and always-on monitoring applications. |
| Output Drive Strength | IOH = −120 μA (min), IOL = 3 mA (max) - push-pull RESET/RESET outputs directly drive MCU reset pins without external pullups. |
| Input Hysteresis (VHYS) | 50 mV - prevents chatter during slow-rising/falling supply transitions or noisy rail conditions. |
Pinout & Package
TPS3825-33DBVRG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90 mm × 1.60 mm, optimized for high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: RESET | Active-low reset output | Push-pull output asserted low when VDD < VIT− or MR is low; drives MCU reset pin directly. |
| 2: GND | Ground reference | Primary return path for internal circuitry and output stage; must be connected to system ground plane. |
| 3: MR | Manual reset input | Active-low input; forces reset regardless of VDD state; internally pulled up to VDD via 90 kΩ resistor. |
| 4: RESET | Active-high reset output | Complementary push-pull output asserted high under same conditions as RESET; enables mixed-logic designs. |
| 5: VDD | Power supply and monitored rail | Supplies device and serves as monitored input; requires local 0.1 μF ceramic bypass capacitor per datasheet recommendation. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-polarity reset outputs | Simultaneous active-low (RESET) and active-high (RESET) signals eliminate need for external inverters in mixed-logic systems. |
| Integrated watchdog timer | 1.6s timeout triggered by missing WDI falling edge - detects firmware lockup without external timing components. |
| Factory-trimmed 3.3V threshold | 2.93V nominal VIT− with ±70mV hysteresis - matches standard 3.3V LDO output tolerances and avoids external resistor networks. |
| Low-power supervision | 15μA typical IDD - enables continuous monitoring in energy-sensitive applications like portable instrumentation and IoT edge nodes. |
| Industrial temperature rating | −40°C to 85°C operating range - qualified for deployment in industrial control panels, programmable logic controllers, and telecom infrastructure. |
Applications
| Microcontroller Power Sequencing | Industrial Programmable Logic Controller (PLC) |
|---|---|
|
Use Scenario: Ensures clean startup and safe shutdown of ARM Cortex-M or MSP430-based controllers during power-up, brownout, or software fault. IC Role / Device Role / Timing Role: Monitors 3.3V core supply and asserts synchronized RESET/RESET signals with 200ms delay to meet processor tRST requirements. Use Value: Prevents undefined MCU state by guaranteeing minimum reset pulse width and eliminating race conditions between supply stabilization and clock enable. |
Use Scenario: Provides fail-safe reset generation in DIN-rail mounted PLC modules exposed to wide ambient temperature swings and EMI-rich factory environments. IC Role / Device Role / Timing Role: Supervises 3.3V I/O and communication interface rails; MR pin accepts emergency stop signal; WDI monitors main CPU heartbeat. Use Value: Enables deterministic recovery from transient faults without operator intervention, meeting SIL-2 functional safety support requirements. |
| Battery-Powered Wireless Sensor Node | Notebook System Power Management |
|
Use Scenario: Maintains reliable operation in LoRaWAN or BLE sensor endpoints powered by coin cells or energy harvesters with unstable output. IC Role / Device Role / Timing Role: Monitors buck-boost regulator output; uses MR to initiate graceful sleep/wake transition; WDI validates firmware execution loop. Use Value: Extends battery life via 15μA quiescent current while ensuring full recovery from deep-sleep wake-up glitches or supply sag. |
Use Scenario: Coordinates reset sequencing across multiple voltage domains (CPU core, SoC I/O, display backlight) in thin-and-light notebooks. IC Role / Device Role / Timing Role: Acts as secondary supervisor for 3.3V platform controller hub (PCH) rail; RESET/RESET outputs interface with EC and BIOS reset logic. Use Value: Eliminates boot failures caused by marginal 3.3V rail droop during GPU/CPU turbo boost, improving OEM yield and field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage supervision applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS3824-33DBVR | Identical pinout, threshold (2.93V), and 200ms delay; shares dual-reset and WDI functionality. | No MR pin - lacks manual reset capability required for emergency system halt or debug mode entry. | Select TPS3824-33DBVR only if manual reset is unnecessary and board layout must retain identical footprint. |
| TPS3823-33DBVR | Same 5-pin SOT-23 package and 2.93V threshold, but offers only active-low RESET output (no RESET). | Requires external inverter or logic gate to generate active-high reset signal, increasing BOM count and board area. | Choose TPS3823-33DBVR when cost sensitivity outweighs design simplicity and dual-output flexibility. |
Compared with TPS3825-33DBVRG4, TPS3824-33DBVR removes MR functionality while preserving dual-reset capability, whereas TPS3823-33DBVR retains MR but eliminates the active-high output-making TPS3825-33DBVRG4 the only option delivering both features in one device.
Availability
TPS3825-33DBVRG4 is available at Aetrix Electronics and suitable for microcontroller power sequencing, industrial PLC supervision, and battery-powered wireless sensor node applications requiring stable component supply and long-term manufacturability.
Supply support for TPS3825-33DBVRG4 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 specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in power management and system supervision ICs.
The TPS382x family was designed specifically for robust, low-power supply monitoring in DSP and microprocessor-based systems, emphasizing precision threshold accuracy, integrated watchdog functionality, and minimal external component count.
FAQ
What is the exact reset threshold voltage of the TPS3825-33DBVRG4?
The TPS3825-33DBVRG4 has a negative-going input threshold voltage (VIT−) of 2.86 V (min), 2.93 V (typ), and 3.00 V (max) across −40°C to 85°C. This factory-trimmed 3.3V supervision point ensures compatibility with standard 3.3V LDO outputs and eliminates need for external resistor dividers. The 50 mV hysteresis prevents oscillation during slow supply transitions.
Does the TPS3825-33DBVRG4 support both active-low and active-high reset outputs simultaneously?
Yes, the TPS3825-33DBVRG4 provides two independent reset outputs: pin 1 (RESET) is active-low and pin 4 (RESET) is active-high. Both assert synchronously when VDD falls below VIT− or MR is pulled low. This dual-output architecture allows direct interfacing with processors requiring either reset polarity without external logic inversion.
How does the watchdog timer function on the TPS3825-33DBVRG4?
The TPS3825-33DBVRG4 watchdog timer (WDI on pin 3) requires a falling edge at least once every 1.6 seconds (typ) to prevent reset assertion. If no transition occurs within the timeout window, RESET/RESET activate for 200ms. WDI can be left floating - the device generates internal pulses to inhibit false timeout - or driven actively by MCU GPIO.
What is the purpose of the MR pin on the TPS3825-33DBVRG4?
The MR (manual reset) pin on the TPS3825-33DBVRG4 is an active-low input (pin 3) that forces RESET/RESET assertion regardless of VDD level or watchdog state. It features an internal 90 kΩ pullup resistor, so it may be left unconnected or tied to VDD when unused. MR enables hardware-triggered resets for emergency stop, debug mode entry, or system recovery sequences.
Is the TPS3825-33DBVRG4 compatible with the TPS3823-33DBVR footprint?
Yes, the TPS3825-33DBVRG4 shares the identical 5-pin SOT-23 (DBV) package and pinout with the TPS3823-33DBVR, including VDD (pin 5), GND (pin 2), MR (pin 3), RESET (pin 1), and RESET (pin 4). However, TPS3823-33DBVR lacks the active-high RESET output - pin 4 is no-connect - so PCBs designed for TPS3825-33DBVRG4 fully support TPS3823-33DBVR as a functional subset.
TPS3825-33DBVRG4 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:
- 2.93V
- 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
TPS3825-33DBVRG4 FAQ
1.How can I place an order for TPS3825-33DBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for TPS3825-33DBVRG4 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 TPS3825-33DBVRG4 reliable?
The price and inventory of TPS3825-33DBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPS3825-33DBVRG4 is usually 5 days.
3.What payment methods are accepted for TPS3825-33DBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPS3825-33DBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPS3825-33DBVRG4?
TPS3825-33DBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPS3825-33DBVRG4 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 TPS3825-33DBVRG4?
For technical support, including TPS3825-33DBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPS3825-33DBVRG4 requirements.
6.How does Aetrix verify that TPS3825-33DBVRG4 is sourced from the original manufacturer or authorized distributors?
All TPS3825-33DBVRG4 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 TPS3825-33DBVRG4 meets industry standards.
7.What is the process for return or replacement of TPS3825-33DBVRG4?
All TPS3825-33DBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with TPS3825-33DBVRG4, 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 TPS3825-33DBVRG4 part is unused and in its original packaging.
Return procedure for TPS3825-33DBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPS3825-33DBVRG4 Tags
-
MIC826SYMT-TR
Microchip Technology
-
APX803S-31SA-7
Diodes Incorporated
-
APX803L20-29SA-7
Diodes Incorporated
-
TPS3828-33DBVR
Texas Instruments
-
V6340RSP3B+
EM Microelectronic
-
EM6325CXSP5B-2.9+
EM Microelectronic
-
MCP120T-300I/TT
Microchip Technology
-
MCP130T-315I/TT
Microchip Technology
-
MCP120T-475I/TT
Microchip Technology
-
MCP111T-300E/TT
Microchip Technology
-
MCP120T-315I/TT
Microchip Technology
-
MCP809T-315I/TT
Microchip Technology
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
