The NXP PCA8550PW,118 is a single-supply multiplexer with a 1 x 4:4 circuit configuration, meaning it routes four inputs to four outputs through one control path. Packaged in a 16-TSSOP (4.40mm width) for surface-mount assembly, this part is typically specified for signal routing in office equipment, appliances, or indoor PCB-based control boards where the temperature stays within the commercial range.
Supply voltage and output drive — BOM-fit details
The 3V to 3.6V single-supply range is tight: it tracks a regulated 3.3V rail, not a wide-input bus. If your board already runs 3.3V logic, this part drops in without a secondary regulator. The output high and low current capability is rated at 2mA each — enough to drive a few CMOS gate inputs or a low-power LED indicator, but not a relay coil or a long backplane trace. For loads beyond a few milliamps, plan a buffer stage.
The 16-TSSOP package (4.40mm body width) is a common fine-pitch footprint — 0.65mm lead pitch typical for this family. It is surface-mount only, so hand-prototyping needs a small-tip iron or hot-air rework.
No NRND or last-time-buy notices are on file for this order code. No pin-compatible second source or direct replacement is documented in the available records, so dual-sourcing would require evaluating functionally equivalent multiplexers from other vendors with the same 1 x 4:4 topology and 3.3V supply.