54AC253

www.DataSheet4U.com 54AC253 54ACT253 Dual 4-Input Multiplexer with TRI-STATE Outputs August 1998 54AC253 54ACT253 Dual 4-Input Multiplexer with TRI-STATE ® Outputs General Description The ’AC/’ACT253 is a dual 4-input multiplexer with TRI-STATE outputs. It can select two bits of data from four sources using common select inputs. The outputs may be individually switched to a high impedance state with a HIGH on the respective Output Enable (OE) inputs, allowing the outputs to interface directly with bus oriented systems. n n n n n Multifunction capability Noninverting TRI-STATE outputs Outputs source/sink 24 mA ’ACT253 has TTL-compatible inputs Standard Military Drawing (SMD) — ’AC253: 5962-87693 — ’ACT253: 5962-87761 Features n ICC and IOZ reduced by 50% Logic Diagrams IEEE/IEC DS100285-1 DS100285-2 Pin Names I0a–I3a I0b–I3b S0, S1 OEa OEb Za, Zb Description Side A Data Inputs Side B Data Inputs Common Select Inputs Side A Output Enable Input Side B Output Enable Input TRI-STATE Outputs TRI-STATE ® is a registered trademark of National Semiconductor Corporation. FACT ® is a registered trademark of Fairchild Semiconductor Corporation. © 1998 National Semiconductor Corporation DS100285 www.national.com Connection Diagrams Pin Assignment for DIP and Flatpak Pin Assignment for LCC DS100285-3 DS100285-4 Functional Description The ’AC/’ACT253 contains two identical 4-input multiplexers with TRI-STATE outputs. They select two bits from four sources selected by com...