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DM74AS258 - 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers

Download the DM74AS258 datasheet PDF. This datasheet also covers the DM74AS257 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 (DM74AS257_FairchildSemiconductor.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
DM74AS240 (DM74AS240 - DM74AS244) Bus Driver / Receiver National Semiconductor
DM74AS241 (DM74AS240 - DM74AS244) Bus Driver / Receiver National Semiconductor
DM74AS242 (DM74AS240 - DM74AS244) Bus Driver / Receiver National Semiconductor
DM74AS243 (DM74AS240 - DM74AS244) Bus Driver / Receiver National Semiconductor
DM74AS244 (DM74AS240 - DM74AS244) Bus Driver / Receiver National Semiconductor

Other Datasheets by Fairchild (now onsemi)

Part Number Description
DM74AS257 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers
DM74AS21 Dual 4-Input AND Gate
DM74AS240 3-STATE Bus Driver/Receiver
DM74AS244 3-STATE Bus Driver/Receiver
DM74AS245 Octal Bus Transceiver with 3-STATE Outputs

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.