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74AS258 - 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers

Download the 74AS258 datasheet PDF. This datasheet also covers the 74AS257 variant, as both devices belong to the same 3-state quad 1 of 2 line data selector/multiplexers family and are provided as variant models within a single manufacturer datasheet.

General Description

These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four 3STATE outputs that can interface directly with data lines of bus-organized systems.

A 4-bit word selected from one of two sources is routed to the four outputs.

Key Features

  • s Switching specifications at 50 pF s Switching specifications guaranteed over full temperature and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL proc.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (74AS257-FairchildSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
74AS21 DM74AS21 ETC
74AS243 DM74AS243 ETC
74AS00 Quadruple 2-Input Positive-NAND Gates Texas Instruments
74AS04 Hex Inverters Texas Instruments
74AS08 Quadruple 2-Input Positive-AND Gates Texas Instruments

Other Datasheets by Fairchild (now onsemi)

Part Number Description
74AS257 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers
74AS244 DM74AS244
74AS08 Quad 2-Input AND Gate
74ABT125 Quad Buffer
74ABT126 Quad Buffer

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
DM74AS257 • DM74AS258 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers September 1986 Revised March 2000 DM74AS257 • DM74AS258 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers General Description These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four 3STATE outputs that can interface directly with data lines of bus-organized systems. A 4-bit word selected from one of two sources is routed to the four outputs. The DM74AS257 presents true data whereas the DM74AS258 presents inverted data to minimize propagation delay time. This 3-STATE output feature means that n-bit (paralleled) data selectors with up to 300 sources can be implemented for data buses.