Texas Instruments TPS3823-33DBVRG4

Overview

TPS3823-33DBVRG4 from Texas Instruments is a fixed-threshold voltage supervisor IC with integrated watchdog timer, active-low push-pull reset output, manual reset input (MR), and 3.3V supply monitoring capability. It provides power-on reset with 200ms delay, monitors VDD down to 1.1V startup, asserts RESET when VDD falls below 2.93V (typ), and features 15μA typical supply current in a 5-pin SOT-23 package for microcontroller-based embedded systems.

For engineers reviewing the TPS3823-33DBVRG4 datasheet, TPS3823-33DBVRG4 pinout, TPS3823-33DBVRG4 application, or TPS3823-33DBVRG4 equivalent, this page delivers verified functional identity, confirmed 5-pin SOT-23 package mapping, validated watchdog timeout of 1.6s, exact threshold hysteresis of 50mV, and real-world use cases in industrial controllers and battery-powered DSP systems.

Technical Context

The TPS3823-33DBVRG4 implements a precision bandgap reference and comparator-based supervision architecture with internal 2.93V negative-going threshold (VIT−) and 50mV hysteresis (VHYS). Its watchdog timer requires periodic WDI falling edges to prevent timeout; absence triggers a 200ms reset pulse. The MR input forces immediate reset regardless of VDD level or watchdog state.

Reset assertion occurs at VDD ≥ 1.1V during power-up, then remains active until VDD exceeds VIT− + VHYS (2.98V), after which the 200ms delay timer starts. Supply voltage range is 1.1V–5.5V, operating temperature is −40°C to 85°C, and no external components are required for basic supervision functionality.

Key Specifications

Pinout & Package

TPS3823-33DBVRG4 is housed in a 5-pin SOT-23 (DBV) package measuring 2.90mm × 1.60mm, with gull-wing leads optimized for high-density PCB layouts and automated assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3823A-33DBVR, the TPS3823-33DBVRG4 offers identical supervision functionality at lower cost for commercial-temperature applications; compared with TPS3808G33DBVR, it trades ultra-low current for integrated watchdog and fixed 200ms timing-critical for fail-safe embedded control.

Availability

TPS3823-33DBVRG4 is available at Aetrix Electronics and suitable for industrial programmable controllers, battery-powered wireless sensors, embedded DSP modules, and desktop computer power management systems requiring stable component supply across production lifecycles.

Supply support for TPS3823-33DBVRG4 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 delivering analog and embedded processing solutions, with over 90 years of innovation in power management, signal chain, and microcontroller technologies.

The TPS382x family was designed specifically for reliable power-on reset and runtime supervision of DSPs, microcontrollers, and microprocessors in industrial, computing, and communications equipment-emphasizing integration, low power, and robust noise immunity.

FAQ

What is the exact supply voltage threshold for TPS3823-33DBVRG4?

The TPS3823-33DBVRG4 has a nominal negative-going input threshold voltage (VIT−) of 2.93V, with guaranteed minimum 2.86V and maximum 3.00V across −40°C to 85°C. This threshold is factory-trimmed and fixed-no external resistors are needed to set the 3.3V supervision point. The device asserts RESET when VDD falls below this value and releases it only after VDD rises above VIT− + VHYS (2.98V).

Does TPS3823-33DBVRG4 include a watchdog timer, and what is its timeout period?

Yes, the TPS3823-33DBVRG4 includes an integrated watchdog timer with a nominal timeout period (t_tout) of 1.6 seconds. The timer resets on each falling edge at the WDI pin; failure to provide such an edge within 1.6s triggers a 200ms active-low RESET pulse. This feature is confirmed in TI's SLVS165O datasheet Section 6.8 and distinguishes TPS3823-33DBVRG4 from non-watchdog variants like TPS3825.

What is the function of the MR pin on TPS3823-33DBVRG4, and how should it be used?

The MR (Manual Reset) pin on TPS3823-33DBVRG4 is an active-low input that forces RESET assertion regardless of VDD level or watchdog state. Pulling MR low immediately activates RESET; release allows the internal 200ms timer to restart once VDD is valid. When unused, MR may be left floating-the device includes a 90kΩ internal pullup to VDD-eliminating need for external components.

Is TPS3823-33DBVRG4 pin-compatible with other TPS382x family members?

TPS3823-33DBVRG4 shares the same 5-pin SOT-23 (DBV) package and pinout as TPS3820, TPS3823A, TPS3824, TPS3825, and TPS3828 per Figure 5-1 in the datasheet. However, functional differences exist: TPS3824/TPS3825 offer active-high RESET, TPS3828 uses open-drain output, and TPS3820 has 25ms delay. Pin compatibility does not imply functional interchangeability without design review.

What is the supply current consumption of TPS3823-33DBVRG4 under normal operation?

The TPS3823-33DBVRG4 draws 15μA typical supply current (I_DD) when MR, WDI, and outputs are unconnected and VDD is stable within specification. This value is measured across −40°C to 85°C and includes all internal circuitry-bandgap reference, comparator, watchdog oscillator, and output driver-making it suitable for multi-year battery operation in low-duty-cycle sensing applications.