CD4555BM — 1 x 2:4 decoder/demultiplexer from the 4000B family
The Texas Instruments CD4555BM is a dual 1-of-4 decoder/demultiplexer from the 4000B logic series. It contains two independent 1 x 2:4 circuits, each with active-high outputs. The part operates across a wide supply range of 3V to 18V and is specified over the full military temperature range of -55°C to 125°C, making it suitable for industrial, avionics, and downhole applications where the logic level must span a variable rail and the ambient temperature is extreme.
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).
Sourcing and lifecycle
The CD4555BM carries an Active product status with no NRND or EOL flags. It is ROHS3 compliant.