PCA9548A www.ti.com SCPS143G – JUNE 2009 – REVISED MARCH 2021 SCPS143G – JUNE 2009 – REVISED MARCH 2021 PCA9548A Low Voltage 8-Channel I C Switch with Reset2 eight downstream pairs, or channels. Any individual
above, a 3 level eliminating the address conflicts between the EEPROM’s can be performed with a PCA9548A (8 nodes of which you need 7). Therefore you would have only five of the switches active at a time: - 1stlevel: one PCA9546A connected to the master device - 2nd level:three PCA9548A or two PCA9548A plus one PCA9546A connected to each downstream of the 1 st level PCA9548A rd nd - 3 level: one PCA9548A active and no address conflicts to each downstream channel of the 2 level devices. 28. Question: I am using a PCA9544A. If there is a short on one of the output buses
condition, the bus master must output the address of the slave it is accessing. The address of the PCA9548A is shown in Figure 5. To conserve power, no internal pull-up resistors are incorporated on the hardware selectable address pins and they must be pulled HIGH or LOW.
1 1 1 0 A2 A1 A0 R/W
fixed
hardware
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