I²C bus mux — two downstream channels
The PCA9542APW/DG118 is a 2-channel I²C multiplexer from NXP Semiconductors in a 14-pin TSSOP package. It lets a single upstream I²C master bus connect to two independent downstream buses, each with its own address space and pull-up resistors — useful when two devices share the same I²C address or when bus capacitance exceeds the 400 pF limit for standard-mode operation.
Package and handling note
Supplied in Bulk (tube or tray), not tape-and-reel — factor this into pick-and-place setup if your line is configured for reel-fed components. The 14-TSSOP footprint is standard; the 0.65 mm pitch demands a controlled solder-paste stencil and a reflow profile matching JEDEC MSL-1 (moisture sensitivity not explicitly stated, but TSSOP packages typically ship dry-packed).