The TPT29545 is a 1:4 bidirectional translating I2C switch. The SCL/SDA upstream pair fans out to four downstream channels. Any single SCn/SDn channel or combination of channels can be selected, determined by the programmable control register. Four interrupt inputs (INT0 to INT3) are designed as one for each of the downstream pairs. One interrupt (INT) output acts as an AND of the four interrupt inputs.