TCAN332G: Can TCAN332G support Hot-plug capable?

Hi Jimmy,

Hot-plug is not a common term used for CAN, so this may have different meanings. 

Most CAN transceivers including TCAN332 and TCAN3413 are nominally high high impedance to the bus when unpowered and will not present a significant load to the bus when they are not actively driving a dominant signal. This mean that if an unpowered transceiver were to be connected to an active CAN bus, it would not pose a significant risk of interrupting the communication between other nodes. In this regard, I would say that TCAN332 can support this feature. 

Another meaning of the term hot-plug could refer to is that the new node can gracefully join an bus when powered-on. This typically involves some protocol-aware element that can determine when the bus is idle so that any part-frame that is caught during power up can be ignored and only full frames are recognized. For CAN, this will typically be handled by the CAN controller in the MCU as most CAN transceivers are not protocol aware. In this case I would not say this requirement applies to the TCAN332, but it would be able to support a CAN controller that is capable of this function. 

Let me know if you have any more questions. 

Regards, 
Eric Schott

Hi Jimmy,

I'm not sure I quite understand your use case. CAN transceivers are all half duplex devices that are capable of both transmitting and receiving data on the CANH and CANL differential signal lines. These are typically connected off-board via cables to a network of other CAN transceivers. From the physical layer perspective, there is little concern when plugging in new transceiver into an active network. 

Let me know if I am misunderstanding your question or if there is anything else I can elaborate on. 

Regards, 
Eric Schott