SCPS267B March 2017 – February 2020 TCA9803
The TCA980x family supports multiple TCA980x used in series. It is acceptable to connect A sides together, or have A sides connect to B sides, but B-sides may never be connected together.
It is critical to note that there are no external sources of current allowed on the B-side ports, since this can affect device operation as shown in the IEXT-I section.
NOTE: B-sides of TCA980x devices may never be connected to each other, because the IEXT-I specification limit is violated. See the IEXT-I for more information.
NOTE: The B-side may not be connected to another translator if it uses a static-voltage offset. The RILC spec is violated since the static voltage offset adjusts the output resistance to ground to be outside of the RILC spec requirement, causing the TCA980x to be unable to recognize a low.
Decoupling capacitors are not shown to keep the illustration simple. Decoupling capacitors (1 µF and 0.1 µF) must be placed close to each power supply pin.