SNVSCF7
December 2022
TPS3435
PRODUCTION DATA
1
Features
2
Applications
3
Description
4
Revision History
5
Device Comparison
6
Pin Configuration and Functions
7
Specifications
7.1
Absolute Maximum Ratings
7.2
ESD Ratings
7.3
Recommended Operating Conditions
7.4
Thermal Information
7.5
Electrical Characteristics
7.6
Timing Requirements
7.7
Switching Characteristics
7.8
Timing Diagrams
7.9
Typical Characteristics
8
Detailed Description
8.1
Overview
8.2
Functional Block Diagrams
8.3
Feature Description
8.3.1
Timeout Watchdog Timer
8.3.1.1
tWD Timer
8.3.1.2
Watchdog Enable Disable Operation
8.3.1.3
tSD Watchdog Start Up Delay
8.3.1.4
SET Pin Behavior
8.3.2
Manual RESET
8.3.3
WDO Output
8.4
Device Functional Modes
9
Application and Implementation
9.1
Application Information
9.1.1
Output Assert Delay
9.1.1.1
Factory-Programmed Output Assert Delay Timing
9.1.1.2
Adjustable Capacitor Timing
9.1.2
Watchdog Timer Functionality
9.1.2.1
Factory-Programmed Timing Options
9.1.2.2
Adjustable Capacitor Timing
9.2
Typical Applications
9.2.1
Design 1: Monitoring a Standard Microcontroller for Timeouts
9.2.1.1
Design Requirements
9.2.1.2
Detailed Design Procedure
9.2.1.2.1
Setting the Watchdog Timeout Period
9.2.1.2.2
Setting Output Assert Delay
9.2.1.2.3
Setting the Startup Delay
9.2.1.2.4
Calculating the WDO Pullup Resistor
9.2.1.3
Application Curves
10
Power Supply Recommendations
11
Layout
11.1
Layout Guidelines
11.2
Layout Example
12
Device and Documentation Support
12.1
Receiving Notification of Documentation Updates
12.2
Support Resources
12.3
Trademarks
12.4
Electrostatic Discharge Caution
12.5
Glossary
13
Mechanical, Packaging, and Orderable Information
Package Options
Mechanical Data (Package|Pins)
DDF|8
MPDS569D
Thermal pad, mechanical data (Package|Pins)
Orderable Information
snvscf7_oa
1
Features
Factory programmed or user-programmable watchdog timeout
±10% Accurate timer (maximum)
Factory programmed: 1 msec to 100 sec
Factory programmed or user-programmable reset delay
±10% Accurate timer (maximum)
Factory programmed option: 2 msec to 10 sec
Input voltage range: V
DD
= 1.04 V to 6.0 V
Ultra low supply current: I
DD
= 250 nA (typical)
Open-drain, push-pull; active-low outputs
Various programmability options:
Watchdog enable-disable
Watchdog startup delay: no delay to 10 sec
On the fly timer extension: 1X to 256X
Latched output option
MR
functionality support