O cenário
Designing an automotive diagnostic interface where an MCU must drive and read the ISO 9141 K-line through an MC33290 transceiver, with battery power and ESD protection.
O que há neste desenho
Entenda as decisões por trás dele.
01
Use MC33290 as the K-line transceiver IC between MCU TX/RX and the K-line bus
02
Add an external diode from K-line to ground for ESD protection and a pull-up to fused battery voltage
03
Power the MCU from a regulated 5V rail derived from the fused 12V vehicle battery
Reuse this netlist for OBD-II K-line interfaces, vehicle diagnostics, and ISO 9141 transceiver designs needing ESD robustness.