ZHCSJK5C January 2018 – October 2020 TCAN4550-Q1
Selecting the crystal or clock input depends upon system implementation. To support 2 and 5 Mbps CAN FD the clock in or crystal needs to have 0.5% frequency accuracy. The minimum value of 20 MHz is needed to support CAN FD with a rate of 2 Mbps. The recommended value for CLKIN or crystal is 40 MHz to meet CAN FD rates up to 5 Mbps data rates in order to support higher data throughout. If a crystal is used see the manufacturer’s documentation on proper biasing.
The TCAN4550-Q1 was evaluated with the NX2016SA 20MHz and 40MHz crystals