Features: • 3-State Versions of the 4ALS153 and SN74AS153• Permits Multiplexing From n Lines to One Line• Performs Parallel-to-Serial Conversion• Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J)...
SN54ALS253: Features: • 3-State Versions of the 4ALS153 and SN74AS153• Permits Multiplexing From n Lines to One Line• Performs Parallel-to-Serial Conversion• Package Options Include Plas...
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Features: PinoutSpecificationsDescriptionThe SN54/74LS147 and SN54/74LS148 are Priority Encoders. ...
PinoutDescriptionThe LS155 and LS156 are Dual 1-of-4 Decoder/Demultiplexers with common Address in...

These data selectors/multiplexers of SN54ALS253 contain inverters and drivers to supply full binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two 4-line sections.
The 3-state outputs of SN54ALS253 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 drives the bus line to a high or low logic level. Each output of SN54ALS253 has its own output-enable (OE) input. The output is disabled when OE is high.
The SN54ALS253 is characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS253 and SN74AS253A are characterized for operation from 0°C to 70°C.