전자부품 데이터시트 검색엔진 |
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74F148SC 데이터시트(PDF) 1 Page - Fairchild Semiconductor |
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74F148SC 데이터시트(HTML) 1 Page - Fairchild Semiconductor |
1 / 6 page © 1999 Fairchild Semiconductor Corporation DS009480 www.fairchildsemi.com April 1988 Revised July 1999 74F148 8-Line to 3-Line Priority Encoder General Description The F148 provides three bits of binary coded output repre- senting the position of the highest order active input, along with an output indicating the presence of any active input. It is easily expanded via input and output enables to provide priority encoding over many bits. Features s Encodes eight data lines in priority s Provides 3-bit binary priority code s Input enable capability s Signals when data is present on any input s Cascadable for priority encoding of n bits Ordering Code: Devices also available in Tape and Reel. Specify by appending the suffix letter “X” to the ordering code. Logic Symbols IEEE/IEC Connection Diagram Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Order Number Package Number Package Description 74F148SC M16A 16-Lead Small Outline Integrated Circuit (SOIC), JEDEC MS-012, 0.150 Narrow 74F148SJ M16D 16-Lead Small Outline Package (SOP), EIAJ TYPE II, 5.3mm Wide 74F148PC N16E 16-Lead Plastic Dual-In-Line Package (PDIP), JEDEC MS-001, 0.300 Wide Inputs Outputs EI I0 I1 I2 I3 I4 I5 I6 I7 GS A0 A1 A2 EO H X XXX XXX X H H H H H L HHH HHH HH H H HH L L X XXX XXX L L L L L H L X XXX XX L H L H L L H L X XXX X L H H L L H L H L X XXX L H H H L H H L H LX X X L H H H H L L L H H L X X L HHH HH L H L H H L X L H HHH HH L L HH H L L HH HHH HH L H HH H |
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