Texas Instruments TPS3850H30DRCR

Overview

TPS3850H30DRCR from Texas Instruments is a precision voltage supervisor IC with integrated programmable window watchdog timer, designed for high-reliability microcontroller and SoC power-rail monitoring. It delivers 0.8% threshold accuracy over –40°C to +125°C, supports 1.6 V–6.5 V supply range, features open-drain RESET and WDO outputs, and enables tight-tolerance fault detection in ultrasound scanners and active antenna systems.

For engineers reviewing the TPS3850H30DRCR datasheet, TPS3850H30DRCR pinout, TPS3850H30DRCR application, or TPS3850H30DRCR equivalent, key selection considerations include its ±4%/±7% programmable fault windows, factory- or capacitor-programmable reset and watchdog delays, 10 µA typical supply current, and 3-mm × 3-mm VSON-10 package compatibility with space-constrained industrial and medical electronics.

Technical Context

The TPS3850H30DRCR implements dual independent timing paths: one for RESET delay (programmed via CRST pin configuration) and one for window watchdog boundaries (set by CWD, SET0, and SET1 logic states). Its precision window comparator uses trimmed internal references to achieve 0.8% VIT+(OV) and VIT−(UV) accuracy across temperature, with 0.5% hysteresis ensuring immunity to rail noise and glitches.

Watchdog operation requires valid falling-edge transitions on WDI within dynamically configurable time windows-tWDL (lower boundary) and tWDU (upper boundary)-with ratios selectable as 1/8, 3/4, or 1/2 via SET0/SET1. The device supports watchdog disable via logic pin combinations and maintains functional isolation between RESET and WDO assertion states.

Key Specifications

Pinout & Package

TPS3850H30DRCR is housed in a 3.00-mm × 3.00-mm, 10-pin VSON package (DRC) with exposed thermal pad connected internally to GND. The package supports high-density PCB layouts and provides low thermal resistance (R_θJA = 52.3°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3851H30DRCR and MAX6373KA29+T, the TPS3850H30DRCR uniquely balances precision window supervision, field-programmable watchdog timing, and ultra-low 10-µA quiescent current in a compact 3-mm × 3-mm VSON package-making it optimal for next-generation medical, telecom, and industrial edge devices demanding both reliability and flexibility.

Availability

TPS3850H30DRCR is available at Aetrix Electronics and suitable for ultrasound scanners, storage area networks, active antenna systems, and robot servo drives requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for TPS3850H30DRCR 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 decades of experience in high-reliability industrial and automotive IC design.

The TPS3850H30DRCR belongs to TI's precision voltage supervisor product line, engineered specifically for systems requiring simultaneous overvoltage, undervoltage, and window watchdog monitoring in harsh thermal and electrical environments.

FAQ

What is the operating voltage range supported by the TPS3850H30DRCR?

The TPS3850H30DRCR supports an input voltage range of 1.6 V to 6.5 V on its VDD pin, enabling direct supervision of common logic rails including 1.2 V, 1.8 V, 3.3 V, and 5.0 V. Its SENSE pin accepts voltages from 0 V to 6.5 V, allowing monitoring of rails down to 0.9 V with ±4% or ±7% fault windows. This wide range makes the TPS3850H30DRCR suitable for mixed-voltage systems without external level-shifting circuitry.

How does the TPS3850H30DRCR implement window watchdog functionality?

The TPS3850H30DRCR implements window watchdog functionality through dedicated timing circuitry that defines two boundaries-tWDL (lower) and tWDU (upper)-within which a falling edge on the WDI pin must occur to prevent WDO assertion. These boundaries are configured via CWD, SET0, and SET1 pins and support ratios of 1/8, 3/4, or 1/2. The TPS3850H30DRCR also allows watchdog disable via logic pin combinations, providing flexibility during firmware development and low-power modes.

What are the reset delay options available for the TPS3850H30DRCR?

The TPS3850H30DRCR offers three reset delay configurations via the CRST pin: (1) unconnected (NC) for factory-programmed 170–230 ms delay, (2) 10-kΩ pullup to VDD for 8.5–11.5 ms, or (3) external capacitor (0.1–1000 nF) for 703 µs to 3.22 s. The capacitor-based option uses Equation 3 from the datasheet, and all configurations maintain 9.5% timing accuracy. This flexibility allows the TPS3850H30DRCR to adapt to diverse system boot requirements without redesign.

Does the TPS3850H30DRCR support hysteresis, and what is its value?

Yes, the TPS3850H30DRCR provides 0.5% hysteresis on both overvoltage and undervoltage thresholds, implemented via internal precision circuitry. This hysteresis prevents oscillatory behavior during slow supply ramps or noise-induced threshold crossings, improving system robustness in electrically noisy environments such as motor drives and RF transceivers. The value is fixed and does not require external components.

What package type and thermal characteristics does the TPS3850H30DRCR use?

The TPS3850H30DRCR uses a 3.00-mm × 3.00-mm, 10-pin VSON package (DRC) with an exposed thermal pad internally connected to GND. Its thermal metrics include R_θJA = 52.3°C/W and R_θJB = 26.1°C/W, supporting reliable operation up to +125°C junction temperature. The small footprint and low thermal resistance make the TPS3850H30DRCR ideal for space-constrained, thermally demanding applications like active antenna systems and portable medical devices.