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DM74S158

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Manufacturer	Part no	Description	View
National ->Texas Instruments	DM74S158	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 output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The S157 presents true data whereas the S158 presents inverted data to minimize propagation delay time. Features ■ Buffered inputs and outputs ■ Typical propagation time DM74S157 5 ns DM74S158 4 ns ■ Typical power dissipation DM74S157 250 mW DM74S158 195 mW Applications ■ Expand any data input point ■ Multiplex dual data buses ■ Generate four functions of two variables (one variable is common) ■ Source programmable counters other parts : DM54S157 DM54S157J DM54S157W DM54S158 DM54S158J DM54S158W DM74S157 DM74S157N DM74S158N
Fairchild Semiconductor	DM74S158	Quad 1 of 2 Line Data Selector/Multiplexer General Description These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The DM74S157 presents true data whereas the DM74S158 presents inverted data to minimize propagation delay time. Features ■ Buffered inputs and outputs ■ Typical propagation time DM74S157 5 ns DM74S158 4 ns ■ Typical power dissipation DM74S157 250 mW DM74S158 195 mW Applications • Expand any data input point • Multiplex dual data buses • Generate four functions of two variables (one variable is common) • Source programmable counters other parts : DM74S157 DM74S157N DM74S158N
National ->Texas Instruments	DM74S158N	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 output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The S157 presents true data whereas the S158 presents inverted data to minimize propagation delay time. Features ■ Buffered inputs and outputs ■ Typical propagation time DM74S157 5 ns DM74S158 4 ns ■ Typical power dissipation DM74S157 250 mW DM74S158 195 mW Applications ■ Expand any data input point ■ Multiplex dual data buses ■ Generate four functions of two variables (one variable is common) ■ Source programmable counters other parts : DM54S157 DM54S157J DM54S157W DM54S158 DM54S158J DM54S158W DM74S157 DM74S157N DM74S158
Fairchild Semiconductor	DM74S158N	Quad 1 of 2 Line Data Selector/Multiplexer General Description These data selectors/multiplexers contain inverters and drivers to supply full on-chip data selection to the four output gates. A separate strobe input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The DM74S157 presents true data whereas the DM74S158 presents inverted data to minimize propagation delay time. Features ■ Buffered inputs and outputs ■ Typical propagation time DM74S157 5 ns DM74S158 4 ns ■ Typical power dissipation DM74S157 250 mW DM74S158 195 mW Applications • Expand any data input point • Multiplex dual data buses • Generate four functions of two variables (one variable is common) • Source programmable counters other parts : DM74S157 DM74S157N DM74S158

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