SLLA628
September 2023
THVD1424
1
Abstract
Trademarks
1
Use Case Domain of RS-485
1.1
RS-485 Compliant Transmitter
1.2
RS-485 Compliant Receiver
1.3
RS-485 Transceiver Use Case Variability
2
Traditional RS-485 Design Process
2.1
Design Process Overview
2.2
Requirement Definition
2.2.1
Bus Voltage and Logic Voltage (VCC and VIO):
2.2.2
Number of Communication Nodes Supported plus Static vs. Dynamic Systems
2.2.3
Max Bus Length, Network Topology, Emission Concerns, and Data Rate Required
2.2.4
Duplex
2.2.5
Protection Needs
2.2.6
Additional Features of RS-485 Bus
2.3
IC Selection, Application Design, and Validation/Qualification
3
One Multi-System Design: Flexible RS-485 with the THVD1424
3.1
Flexible Multi-System Design
3.2
Simplification of RS-485 Design Process Using THVD1424
3.2.1
Bus Voltage and Logic Voltage Supplies (VCC and VIO)
3.2.2
Number of Communication Nodes Supported plus Dynamic or Static Systems
3.2.3
Max Bus Length, Network Topology, Data Rate, and Emissions Concerns
3.2.4
Duplex
3.2.5
Protection Needs
3.2.6
Additional Features
4
Summary
5
References
Application Note
Flexible RS-485: A Simplified Multi-System Design for RS-485 Using the THVD1424