JAJSHO4D January 2014 – November 2019 TCA9545A
A typical application of the TCA9545A will contain anywhere from 1 to 5 separate data pull-up voltages, VDPUX , one for the master device (VDPUM) and one for each of the selectable slave channels (VDPU0 – VDPU3). In the event where the master device and all slave devices operate at the same voltage, then the pass voltage, Vpass = VDPUX. Once the maximum Vpass is known, Vcc can be selected easily using Figure 17. In an application where voltage translation is necessary, additional design requirements must be considered (See Design Requirements).
Figure 16 shows an application in which the TCA9545A can be used.