DM74LS157 Datasheet | Fairchild Semiconductor

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 DM74LS157 presents true data whereas the DM74LS158 presents inverted data to minimize propagation delay time. Applications - Expand any data input point - Multiplex dual data buses - Generate four functions of two variables (one variable is mon) - Source programmable counters Features s Buffered inputs and outputs s Typical Propagation Time DM74LS157 DM74LS158 DM74LS157 DM74LS158 9 ns 7 ns 49 m W 24 m W s Typical Power Dissipation Ordering Code: Order Number DM74LS157M DM74LS157SJ DM74LS157N DM74LS158M DM74LS158N Package Number M16A M16D N16E M16A N16E Package Description 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagrams DM74LS157 DM74LS158 © 2000 Fairchild Semiconductor Corporation DS006396 .fairchildsemi. - DM74LS158 Function Table Inputs Strobe H L L L L H = HIGH Level L = LOW Level X = Don’t Care Output Y A X L H X X B X X X L H DM74LS157 DM74LS158 L L H L H H H L H L Select X L L H H Logic Diagrams DM74LS157 DM74LS158 .fairchildsemi. - DM74LS158 Absolute Maximum Ratings(Note 1) Supply Voltage Input Voltage Operating Free Air Temperature Range Storage Temperature Range 7V 7V 0°C to +70°C - 65°C to +150°C Note 1: The “Absolute Maximum Ratings” are those values beyond which the safety of the device cannot be guaranteed. The device should not be...