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 three-state outputs can interface with and drive 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:
Three-State Version of SN74S153
Schottky-Diode-Clamped Transistors
Permits Multiplexing from N Lines to 1 Line
Performs Parallel-to Serial Conversion
Fully Compatible with Most TTL Circuits
Low Power Dissipation: LS253 ? 35 mW Typical

Datasheet Available:Texas Instruments SN74LS253N

16 pin DIP. Manufactured by Texas Instruments.
A20328