D101
Diodes
DIODES D101 AND D102 NOT ON REV. B ARTWORK
Application NoteNxp
Improving the Transient Immunity Performance of Microcontroller-Based Applications
Hardware and software design techniques to improve transient immunity against ESD and EFT in microcontroller-based applications for appliances, industrial, and automotive systems.
Overview
This application note provides a comprehensive guide to protecting embedded microcontrollers (MCUs) from electrical fast transients (EFT) and electrostatic discharge (ESD). It addresses challenges posed by modern semiconductor process technologies where sub-nanosecond rise times in transients can disrupt 8-bit and 16-bit MCUs. The document details specific vulnerabilities in power pins, edge-sensitive inputs, clock oscillators, and analog inputs. It outlines methods for compliance with IEC 61000-4-2 and IEC 61000-4-4 standards using hardware isolation, PCB layout optimization, and software filtering techniques to prevent logic glitches, data corruption, and physical device damage.
Use Cases
- Developing consumer appliances that meet regulatory EMC requirements for power line transients.
- Hardening industrial and automotive MCU systems against harsh electromagnetic environments.
- Designing PCB layouts to minimize noise coupling and protect sensitive oscillator and analog inputs.
- Implementing software-based filtering to mitigate the impact of electrical glitches on digital logic.
Topics
Transient Immunity
Microcontroller
ESD
EFT
IEC 61000-4-2
IEC 61000-4-4
Electromagnetic Compatibility
EMC
PCB Layout
Current Injection
Referenced Parts
| D101 | Diodes | DIODES D101 AND D102 NOT ON REV. B ARTWORK |