CD4555BM — 1 x 2:4 decoder/demultiplexer from the 4000B family
It contains two independent 1 x 2:4 circuits, each with active-high outputs.
CMOS construction and dual-supply source
The CD4555BM is a CMOS device (, 4000B series). The voltage supply source is listed as dual supply, which refers to the device's internal architecture — it can decode an active-HIGH or active-LOW enable and address inputs referenced to VDD and VSS, not that it requires two separate power rails. Standard connection is a single supply between VDD (3V to 18V) and VSS (ground).
It is ROHS3 compliant.