K-Line Transceiver Circuit with MC33290 and ESD Protection

シナリオ

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.

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Use MC33290 as the K-line transceiver IC between MCU TX/RX and the K-line bus

Add an external diode from K-line to ground for ESD protection and a pull-up to fused battery voltage

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.

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Automotive K-Line Transceiver with MC33290 and ESD Protection

図の背後にある意思決定を読み解く。