Texas Instruments TPS3850H30DRCT

Overview

TPS3850H30DRCT from Texas Instruments is a precision voltage supervisor IC with integrated programmable window watchdog timer, designed for high-reliability power-rail monitoring in microcontroller and SoC systems. 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 operates with only 10 µA typical supply current. It is used in ultrasound scanners and active antenna systems where tight voltage tolerance and fault-detection timing integrity are critical.

For engineers reviewing the TPS3850H30DRCT datasheet, TPS3850H30DRCT pinout, TPS3850H30DRCT application, or TPS3850H30DRCT equivalent, this page provides verified technical context, factory-programmed and capacitor-programmable timing parameters, confirmed 10-pin VSON package mapping, and two validated alternative parts for overvoltage/undervoltage supervision with window watchdog functionality.

Technical Context

The TPS3850H30DRCT implements a dual-threshold window comparator on the SENSE pin with ±0.8% accuracy across temperature for both VIT+(OV) and VIT−(UV), plus 0.5% hysteresis-enabling reliable detection of rail excursions within tight system tolerances. Its state-machine-based watchdog uses dedicated WDI input and WDO output to distinguish early vs. late faults via configurable tWDL and tWDU boundaries.

Reset delay (tRST) and watchdog window timing are set either by factory-programmed defaults (e.g., 200 ms nominal tRST with 9.5% accuracy) or externally via CRST/CWD capacitors (0.1–1000 nF), with SET0/SET1 logic pins selecting among four watchdog ratios (1/8, 3/4, 1/2, disabled) and enabling watchdog disable during development.

Key Specifications

Pinout & Package

TPS3850H30DRCT is housed in a 3.00 mm × 3.00 mm, 10-pin VSON (DRC) package with exposed thermal pad connected internally to GND. The package supports high-density PCB layouts and efficient thermal dissipation via soldered thermal pad to ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS3850H30DRCT, TPS3851H30DRCT offers enhanced flexibility for low-voltage rails but same footprint, while MAX6373KA29+T sacrifices programmability and watchdog intelligence for lower unit cost and simpler layout.

Availability

TPS3850H30DRCT is available at Aetrix Electronics and suitable for ultrasound scanner design, active antenna system mMIMO deployment, robot servo drive validation, and HVAC controller production requiring stable component supply across extended temperature and long-lifecycle programs.

Supply support for TPS3850H30DRCT 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 company specializing in analog and embedded processing technologies, with leadership in precision analog ICs and industrial-grade power management solutions.

The TPS3850 family is designed for high-integrity power-rail supervision in safety-critical and thermally demanding applications, combining precision voltage monitoring with intelligent window watchdog functionality for microcontroller and SoC systems.

FAQ

What is the operating voltage range of the TPS3850H30DRCT?

The TPS3850H30DRCT operates from 1.6 V to 6.5 V on its VDD pin, supporting direct connection to common logic rails including 1.8 V, 3.3 V, and 5 V supplies. This range allows it to supervise both core and I/O domains of modern MCUs and SoCs without external level shifting or regulation.

How accurate are the voltage thresholds on the TPS3850H30DRCT over temperature?

The TPS3850H30DRCT achieves ±0.8% accuracy for both overvoltage (VIT+(OV)) and undervoltage (VIT−(UV)) thresholds across the full operating junction temperature range of –40°C to +125°C, as verified in production testing across 41,111 units per TI SBVS301B datasheet Figure 6-8 and Figure 6-9.

Can the watchdog timer on the TPS3850H30DRCT be disabled?

Yes, the watchdog timer on the TPS3850H30DRCT can be disabled using specific logic states on the SET0 and SET1 pins-specifically, SET0 = high and SET1 = low-as documented in Section 6.6 of the datasheet. This feature avoids spurious timeouts during firmware development or bootloader execution.

What package type does the TPS3850H30DRCT use?

The TPS3850H30DRCT uses a 3.00-mm × 3.00-mm, 10-pin VSON package (DRC variant) with an exposed thermal pad internally connected to GND. This package is optimized for space-constrained industrial and medical PCBs and supports automated optical inspection and reflow soldering.

Does the TPS3850H30DRCT support capacitor-programmable reset delay?

Yes, the TPS3850H30DRCT supports capacitor-programmable reset delay via the CRST pin: connecting a 0.1-nF to 1000-nF capacitor between CRST and GND sets tRST from 703 µs to 3.22 seconds, as defined by Equation 3 in the TI SBVS301B datasheet Section 8.1.1.