DM74AS157 Datasheet | Fairchild Semiconductor

- DM74AS158 Quad 1 of 2 Line Data Selector/Multiplexer April 1984 Revised March 2000 - DM74AS158 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 AS157 presents true data whereas the AS158 presents inverted data to minimize propagation delay time. Features s Switching specifications at 50 p F s Switching specifications guaranteed over full temperature and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin for pin patible with Schottky, low power Schottky, and advanced low power Schottky TTL counterpart s Improved AC performance over Schottky, low power Schottky, and advanced low power Schottky counterparts s Expand any data input point s Multiplex dual data buses s General four functions of two variables (one variable is mon) s Source programmable counters Ordering Code: Order Number DM74AS157M DM74AS157SJX DM74AS157N DM74AS158M DM74AS158N 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 Diagram Function Table Inputs STROBE Select 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 DM74AS157 DM74AS158 L L H L H H H L H L X L L H H © 2000 Fairchild Semiconductor Corporation DS006290 .fairchildsemi. -...