SLLSFP9 February 2024 TCAN1465-Q1 , TCAN1469-Q1
ADVANCE INFORMATION
The TCAN146x family is a group of CAN SIC transceivers that are designed to meet the signal improvement capable requirements of the ISO 11898-2:2024 CAN standard to suppress bus ringing in large or complex CAN networks. Signal Improvement Capable (SIC) was started as a CIA standard and is included in the main section of the standard called set C and outlines SIC operation to be consistent with the design methodology used in existing CAN FD networks – including continued use of 60-ohms as a nominal differential load (two 120-ohm termination resistor in parallel) as well as the wake up pattern (WUP) consisting of a dominant-recessive-dominant pattern. This implementation of the CAN standard is designed to provide CAN networks with ringing suppression while having minimal impact on other design considerations of the network such as termination type, value, placement and operation such as use of the standard WUP.
ISO 11898-2:2024 CAN standard includes new CAN physical layer call CAN XL with SIC mode capability in Annex A. Annex A introduces a more stringent SIC transceiver that can work with standard CAN and CAN XL and is known as SIC mode. Annex A defines specifications primarily addressing the use of CAN XL. CAN XL also uses CAN SIC in the implementation, but defines tighter specifications to the SIC portion of the driver than standalone CAN SIC transceivers. This includes specifying driver behavior across a 50-ohm nominal load to accommodate the 100-ohm characteristic impedance and termination values used in CAN XL system. The TCAN146x can be used in systems utilizing CAN SIC node, this device also specifies behavior across the set C extended load range.
Annex A defines a revision to the standard CAN bus wake up pattern,WUP, to include a second filter period appearing as dominant-recessive-dominant-recessive-dominant. The TCAN146x implements this new WUP but works in set C applications