HEF4555B - Philips

HEF4555B Dual 1-of-4 decoder/demultiplexer

The HEF4555B is a dual 1-of-4 decoder/demultiplexer. Each has two address inputs (A0 and A1), an active LOW enable input (E) and four mutually exclusive outputs which are active HIGH (O0 to O3). When used as a decoder, E when HIGH, forces O0 to O3 LOW. When used as a demultiplexer, the appropriate output is selected by the information on A0 and A1 with E as .

Features

(D): 16-lead SO; plastic (SOT109-1) ( ): Package Designator North America PINNING E A0 and A1 O0 to O3 enable inputs (active LOW) address inputs outputs (active HIGH) FAMILY DATA, IDD LIMITS category MSI See Family Specifications January 1995 2 Philips Semiconductors Dual 1-of-4 decoder/demultiplexer Product specification HEF4555B MSI Fig.3 Logic diagram (one decoder/multiplexer). TRUTH TABLE INPUTS OUTPUTS E A0 LL LH LL LH HX A1 L L H H X O0 O1 HL LH LL LL LL O2 L L H L L Notes 1. H = HIGH state (the more positive voltage) 2. L = LOW state (the less positive voltage) 3. X = stat.