5 Pin Configuration and Functions

1

WDI

6

RESET

2

GND

5

WDR

3

WDT

4

VDD

Not to scale

Figure 5-1. DBV Package

6-Pin SOT-23

Top View

Table 5-1. Pin Functions

PIN

I/O

DESCRIPTION

NO.

NAME

1

WDI

I

Watchdog timer input. This input must be driven at all times and not left floating.

2

GND

I

Ground

3

WDT

I

Programmable watchdog delay input

4

VDD

I

Supply voltage and supervising input

5

WDR

I

Selectable watchdog window ratio input. This input must be tied to VDD or GND and not left floating.

6

RESET

O

Open-drain reset output

TPS3813K33-Q1, TPS3813I50-Q1

SPRS288H – MAY 2008 – REVISED OCTOBER 2021

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