Other Parts Discussed in Thread: ISO1042
We are using the TCAN1051HDQ1 in an isolated CAN circuit. The isolation is performed with a pair of opto-couplers which isolate the RxD and TxD signals. The RxD signal of the transceiver turns the LED of the optocoupler On by sinking 7mA. This is within the absolute maximum rating of the pin (at 8mA) but we are unsure if this is within your recommended range as defined in section 6.4 of your datasheet. It is not clear to us what is defined as positive/negative current in relation to the pin. Please can you confirm whether 7mA is acceptable and if not is there any way to get around this problem i.e. an alternate part from TI? We are fairly limited on how much we can change the circuit as this is an upgrade to an existing product but we are open to any suggestions you may have.