TPS3435CGLEFDDFR datasheet(6/39 Pages) TI2

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Table 5-1. Pin Functions

NAME

PIN NUMBER

I/O

DESCRIPTION

PINOUT A PINOUT B PINOUT C PINOUT D

CRST

—

Programmable reset timeout pin. Connect a capacitor between this pin and GND to

program the reset timeout period. See Section 7.3.4 for more details.

CWD

—

Programmable watchdog timeout input. Watchdog timeout is set by connecting a

capacitor between this pin and ground. See Section 7.3.2.1 for more details.

GND

—

Ground pin

—

Manual reset pin. A logic low on this pin asserts the RESET. See Section 7.3.3 for

more details.

RESET

Reset output. Connect RESET to VDD using a pull up resistance when using open

drain output. RESET is asserted when the voltage at the VDD pin goes below the

undervoltage threshold (VIT-) or MR pin is driven LOW. For pinout options which do

not support independent WDO pin, RESET is also asserted for watchdog error. See

Section 7.3.4 for more details.

SET0

Logic input. SET0, SET1, and WD-EN pins select the watchdog timer scaling and

enable-disable the watchdog; see Section 7.3.2.4 for more details.

SET1

—

Logic input. SET0, SET1, and WD-EN pins select the watchdog timer scaling and

enable-disable the watchdog; see Section 7.3.2.4 for more details.

VDD

Supply voltage pin. For noisy systems, connecting a 0.1µF bypass capacitor is

recommended.

WD-EN

—

Logic input. Logic high input enables the watchdog monitoring feature. See Section

7.3.2.2 for more details.

WDI

Watchdog input. A falling transition (edge) must occur at this pin before the timeout

expires in order for RESET / WDO to not assert. See Section 7.3.2 for more details.

WDO

—

Watchdog output. Connect WDO to VDD using pull up resistance when using open

drain output. WDO asserts when a watchdog error occurs. WDO only asserts when

RESET is high. When a watchdog error occurs, WDO asserts for the set RESET

timeout delay (tD). When RESET is asserted, WDO is deasserted and watchdog

functionality is disabled. See Section 7.3.4 for more details.

TPS35-Q1

SLVSGE8B – NOVEMBER 2022 – REVISED AUGUST 2024

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