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DM74LS253 Datasheet TRI-STATE Data Selectors/Multiplexers

Manufacturer: National Semiconductor (now Texas Instruments)

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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

Overview

54LS253 DM54LS253 DM74LS253 TRI-STATE Data Selectors Multiplexers June 1989 54LS253 DM54LS253 DM74LS253 TRI-STATE Data Selectors.

Key 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-I.

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