Texas Instruments TPS3824-30DBVR

Overview

TPS3824-30DBVR from Texas Instruments is a voltage supervisor IC with integrated watchdog timer, fixed 3.0V supply threshold, active-low and active-high reset outputs, 200ms power-on reset delay, and 1.6s watchdog timeout. It operates in 5-pin SOT-23 package across −40°C to 85°C and serves as system-level reset controller for microcontrollers requiring dual-output supervision and fail-safe watchdog monitoring.

For engineers reviewing the TPS3824-30DBVR datasheet, TPS3824-30DBVR pinout, TPS3824-30DBVR application, or TPS3824-30DBVR equivalent, key selection criteria include its dual-reset output logic (RESET and RESET), 3.0V ±3% threshold accuracy over temperature, 15μA typical supply current, push-pull output drive capability, and compatibility with 1.1V–5.5V supply rails in space-constrained embedded systems.

Technical Context

The TPS3824-30DBVR implements a precision bandgap-based voltage reference with internal resistor divider to set VIT− = 3.0V (min 2.59V, max 2.69V at TA = 0°C–85°C). Its reset assertion is triggered when VDD falls below VIT−, with 50mV hysteresis (VHYS) ensuring noise immunity during brownout recovery.

It integrates a 1.6s watchdog timer activated by WDI transitions; failure to toggle WDI within timeout triggers a full reset cycle with 200ms delay. The device supports manual reset via MR input and provides both push-pull RESET (active-low) and RESET (active-high) outputs-no external pull-ups required.

Key Specifications

Pinout & Package

TPS3824-30DBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, optimized for high-density PCB layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervision applications.

Compared with TPS3823-30DBVR and TPS3825-30DBVR, the TPS3824-30DBVR uniquely delivers both dual-reset logic and watchdog supervision in one 5-pin SOT-23 device-enabling simpler BOMs, reduced PCB area, and higher functional integration for next-generation embedded controllers.

Availability

TPS3824-30DBVR is available at Aetrix Electronics and suitable for industrial PLCs, wireless sensor nodes, notebook SMC subsystems, and microcontroller-based medical devices requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3824-30DBVR 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 power management technologies with over 50 years of innovation in high-reliability IC design.

The TPS382x family was engineered specifically for robust power-supply monitoring and system-level fault recovery in DSP, microcontroller, and microprocessor platforms-emphasizing low power, small footprint, and guaranteed timing behavior under real-world voltage transients.

FAQ

What is the exact supply voltage threshold for TPS3824-30DBVR?

The TPS3824-30DBVR has a nominal negative-going input threshold voltage (VIT−) of 3.0V, specified from 2.59V (min) to 2.69V (max) over −40°C to +85°C. This threshold is factory-trimmed using an internal resistor divider and does not require external calibration. The 50mV hysteresis (VHYS) ensures stable release above VIT− + VHYS, making TPS3824-30DBVR suitable for supervising nominal 3.3V rails with adequate noise margin.

Does TPS3824-30DBVR support both active-high and active-low reset outputs simultaneously?

Yes, TPS3824-30DBVR provides two independent reset outputs: RESET (pin 1, active-low) and RESET (pin 3 in DBV package per Figure 5-2, active-high), both implemented with push-pull drivers. This eliminates the need for external inverters or pull-up resistors when interfacing with MCUs that accept either logic polarity-such as those with bidirectional reset pins or mixed-voltage domain designs. Both outputs assert/deassert synchronously during power-up, brownout, or watchdog timeout events.

What is the watchdog timeout period for TPS3824-30DBVR and how is it triggered?

The TPS3824-30DBVR features a nominal watchdog timeout (ttout) of 1.6 seconds, with a guaranteed range of 0.9s to 2.5s across temperature. It is triggered by absence of a falling edge on the WDI pin (pin 4) within the timeout window. A falling edge clears the timer; sustained high or low states longer than ttout force RESET assertion for the full 200ms delay period. If WDI is left floating, the device internally toggles it to prevent spurious resets.

Can TPS3824-30DBVR operate from a 1.8V supply rail?

No, TPS3824-30DBVR cannot reliably supervise or operate from a 1.8V rail. Its VDD operating range is 1.1V to 5.5V, but its 3.0V threshold is designed for monitoring 3.3V systems. When powered from 1.8V, VDD remains below VIT−, causing continuous RESET assertion and preventing normal system operation. For 1.8V supervision, TI recommends TPS3808G18 or similar low-threshold supervisors-not TPS3824-30DBVR.

What package type and dimensions does TPS3824-30DBVR use?

TPS3824-30DBVR uses the DBV package: a 5-pin SOT-23 variant with nominal body size of 2.90mm × 1.60mm. Pin spacing is 0.95mm, and total package height is 1.15mm max. This compact outline supports high-density routing in space-constrained applications like wearables and IoT edge nodes. The DBV package is RoHS-compliant and qualified per JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1).