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DM74ALS157M bảng dữ liệu(PDF) 1 Page - Fairchild Semiconductor |
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DM74ALS157M bảng dữ liệu(HTML) 1 Page - Fairchild Semiconductor |
1 / 6 page © 2000 Fairchild Semiconductor Corporation DS006205 www.fairchildsemi.com April 1984 Revised February 2000 DM74ALS157 • DM74ALS158 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 out- put 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 ALS157 presents true data whereas the ALS158 presents inverted data to minimize propagation delay time. Features s Switching specifications at 50 pF s Switching specifications guaranteed over full tempera- ture and VCC range s Advanced oxide-isolated, ion-implanted Schottky TTL process s Functionally and pin for pin compatible with Schottky and low power Schottky TTL counterpart s Improved AC performance over Schottky and 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 common) s Source programmable counters Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Connection Diagram Function Table H = HIGH Level L = LOW Level X = Don't Care Order Number Package Number Package Description DM74ALS157M M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow DM74ALS157SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide DM74ALS157N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide DM74ALS158N N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Inputs Output Y Strobe Select A B DM74ALS157 DM74ALS158 HX X X L H LL L X L H LL H X H L LH X L L H LH X H H L |
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