器件名称:
DM74LS253N
功能描述:
TRI-STATE Data Selectors/Multiplexers
文件大小:
158.39KB 共6页
简 介:
54LS253 DM54LS253 DM74LS253 TRI-STATE Data Selectors Multiplexers June 1989 54LS253 DM54LS253 DM74LS253 TRI-STATE Data Selectors Multiplexers General Description Each of these Schottky-clamped data selectors multiplexers contains inverters and drivers to supply fully complementary on-chip binary decoding data selection to the AND-OR gates Separate output control inputs are provided for each of the two four-line sections The TRI-STATE outputs can interface directly with data lines of bus-organized systems With all but one of the common outputs disabled (at a high impedance state) the low impedance of the single enabled output will drive the bus line to a high or low logic level Features Y Y Y Y Y Y Y Y Y TRI-STATE version of LS153 with same pinout Schottky-diode-clamped transistors Permit multiplexing from N-lines to one line Performs parallel-to-serial conversion Strobe output control High fanout totem-pole outputs Typical propagation delay Data to output 12 ns Select to output 21 ns Typical power dissipation 35 mW Alternate Military Aerospace device (54LS253) is available Contact a National Semiconductor Sales Office Distributor for specifications Connection Diagram Dual-In-Line Package Function Table Select Inputs B X L L L L H H H H A X L L H H L L H H C0 X L H X X X X X X Data Inputs C1 X X X L H X X X X C2 X X X X X L H X X C3 X X X X X X X L H Output Control G H L L L L L L L L Output Y Z L H L H L H L H Address Inputs A and B are common to both sections H e Hig……
