SCPS267B March 2017 – February 2020 TCA9803
The following need to be ensured when designing with the TCA980x family:
There are no supply sequencing requirements, VCCA may ramp before, after, or at the same time as VCCB.
There are no supply dependency requirements. VCCA may be greater than, less than, or equal to VCCB. Each supply has its own requirement of voltage range, but there is no required relationship between VCCA and VCCB values.
It is recommended that decoupling capacitors be used on the power supplies (0.1 µF and 1 µF) and that they be placed as close as possible to the VCCA and VCCB pins.