STMicroelectronics provides a recommended PCB layout in the application note AN4846, which includes guidelines for component placement, routing, and thermal management to ensure optimal performance and minimize electromagnetic interference (EMI).
The L99H01XP is a highly configurable device that supports various vehicle protocols such as SAE J1850, ISO 9141-2, and ISO 15765-4. Configuration is done through the SPI interface, and STMicroelectronics provides a software development kit (SDK) and documentation to help with protocol configuration and customization.
The maximum cable length supported by the L99H01XP depends on the specific vehicle protocol and the cable characteristics. As a general guideline, STMicroelectronics recommends keeping the cable length below 10 meters for SAE J1850 and ISO 9141-2 protocols, and below 40 meters for ISO 15765-4 protocol. However, it's essential to perform signal integrity analysis and testing to ensure reliable communication over the desired cable length.
The L99H01XP has built-in bus fault detection capabilities, including voltage, current, and protocol-specific fault detection. In case of a fault, the device can be configured to enter a fault mode, and the host microcontroller can be notified through the SPI interface. Recovery from a fault mode typically involves resetting the device and re-initializing the communication protocol. STMicroelectronics provides guidelines and example code for fault handling and recovery in the device's documentation and SDK.
The L99H01XP is a high-power device that requires proper thermal management to ensure reliable operation. STMicroelectronics recommends using a heat sink or thermal pad to dissipate heat, and provides thermal resistance and power dissipation data in the datasheet. Additionally, the device has a built-in thermal shutdown feature that can be configured to prevent overheating and damage.
L99H01XP datasheet
by STMicroelectronics
