Texas Instruments 2T13K33MDBVREP

Overview

2T13K33MDBVREP from Texas Instruments is a radiation-hardened, extended-temperature window watchdog supervisor IC designed for safety-critical processor initialization and timing supervision in DSP/microcontroller systems. It features a fixed 2.93 V supply voltage monitor (VIT), 25 ms power-on reset delay, 9 µA typical supply current, open-drain RESET output, and programmable watchdog window via WDT/WDR pins. It operates across –55°C to 125°C and is used in automotive control units and space-grade telemetry systems.

For engineers reviewing the 2T13K33MDBVREP datasheet, 2T13K33MDBVREP pinout, 2T13K33MDBVREP application, or 2T13K33MDBVREP equivalent, key selection criteria include its precise 2.93 V threshold voltage, SOT-23 (DBV) 6-pin package compatibility, window-watchdog ratio configurability (e.g., 1:124.9 or 1:25.8), and qualification for extended temperature and high-reliability environments.

Technical Context

The 2T13K33MDBVREP implements a dual-boundary window-watchdog architecture where the upper timeout (0.25 s or 2.5 s typical) is set via WDT pin state or external capacitor, and the lower boundary ratio (e.g., 1:127.7 when WDR = VDD) is selected independently via WDR pin. All timing is derived from an internal oscillator with no external components required for basic operation.

It integrates a precision bandgap reference, rising-edge–sensitive WDI input, open-drain RESET output with 0.4 V max VOL at 2 mA, and a fixed 25 ms reset delay timer that activates after VDD exceeds 2.93 V. The device asserts RESET low when VDD falls below VIT or when WDI pulses violate the programmed window boundaries.

Key Specifications

Pinout & Package

SOT-23 (DBV) 6-pin package, 3.0 mm × 3.0 mm footprint, 1.45 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 2T13K33MDBVREP, TPS3813K33MDBVREP offers identical functionality at lower cost but lacks EP-grade pedigree and extended-lifecycle support, while MAX6373KA33+T provides simpler supervision without windowing-making it unsuitable for applications requiring detection of premature or erratic WDI pulses.

Availability

2T13K33MDBVREP is available at Aetrix Electronics and suitable for automotive engine control, aerospace telemetry, industrial safety PLCs, and medical imaging subsystems requiring stable component supply across extended temperature and long product lifecycles.

Supply support for 2T13K33MDBVREP 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 high-reliability ICs, with decades of heritage in automotive, industrial, and aerospace markets.

The TPS3813 family was engineered specifically for safety-critical processor supervision, emphasizing windowed watchdog integrity, extended-temperature robustness, and controlled baseline manufacturing for mission-critical electronics.

FAQ

What is the exact supply voltage threshold for 2T13K33MDBVREP?

The 2T13K33MDBVREP has a nominal supply voltage threshold (VIT) of 2.93 V, with a guaranteed range of 2.80 V to 3.10 V over the full –55°C to 125°C operating temperature range. This value is factory-trimmed and specified in the Electrical Characteristics table of the SGLS343A datasheet. The 2T13K33MDBVREP uses an internal precision voltage divider to achieve this fixed threshold without external components.

Does 2T13K33MDBVREP support window-watchdog functionality out of the box?

Yes, the 2T13K33MDBVREP implements a true window-watchdog with independently configurable upper and lower timing boundaries. By setting WDT and WDR pins to GND or VDD, users select from four preset window configurations (e.g., 0.25 s window with 7.86 ms lower bound). No external capacitor is required for these modes, and the 2T13K33MDBVREP asserts RESET if WDI pulses fall outside the active window.

What package type and dimensions does 2T13K33MDBVREP use?

The 2T13K33MDBVREP is housed in a 6-pin SOT-23 (DBV) package measuring 3.0 mm × 3.0 mm with a maximum height of 1.45 mm. Its pin pitch is 0.95 mm, and it features NiPdAu lead finish with MSL Level-1 rating. The package outline matches JEDEC MO-178 and is compatible with standard SOT-23 footprints and reflow profiles.

Can 2T13K33MDBVREP operate in extreme temperature environments?

Yes, the 2T13K33MDBVREP is characterized and qualified for continuous operation from –55°C to 125°C. It undergoes JEDEC-standard reliability testing including HAST, temperature cycling, and autoclave exposure. This makes the 2T13K33MDBVREP suitable for under-hood automotive, downhole oil/gas, and space-grade applications where ambient thermal extremes are routine.

Is the RESET output of 2T13K33MDBVREP push-pull or open-drain?

The RESET output of the 2T13K33MDBVREP is open-drain, requiring an external pull-up resistor to the desired logic rail (up to 6 V). This configuration allows multiple 2T13K33MDBVREP devices to share a common reset bus, supports level-shifting between different voltage domains, and ensures predictable behavior during power sequencing when VDD is ramping.