8 Detailed Description

8.1 Overview

The TPS3435 is a high-accuracy timeout watchdog timer device. The device family supports multiple features

related to watchdog operation in a compact 6 pin WSON and 8 pin SOT23 package. The devices are available

in 5 different pinout configurations. Each pinout offers access to different features to meet the various application

requirements.

8.2 Functional Block Diagrams

Capacitance

Detection

Watchdog Timer

Logic

WDO

Logic

Oscillator

VDD

CRST

CWD

WDI

SET0

GND

WDO

MR

Figure 8-1. Pinout Option A

Capacitance

Detection

Watchdog Timer

Logic

WDO

Logic

Oscillator

VDD

CRST

CWD

WDI

SET1

GND

SET0

WDO

Figure 8-2. Pinout Option B

Watchdog Timer

Logic

WDO

Logic

Oscillator

VDD

WD-EN

SET1

WDI

SET0

GND

WDO

MR

Figure 8-3. Pinout Option C

TPS3435

SNVSCF7 – DECEMBER 2022

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