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74LCX138M Folha de dados(PDF) 2 Page - Fairchild Semiconductor |
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74LCX138M Folha de dados(HTML) 2 Page - Fairchild Semiconductor |
2 / 12 page www.fairchildsemi.com 2 Connection Diagrams Pin Assignments for SOIC, SOP, and TSSOP Pad Assignments for DQFN (Top Through View) Pin Descriptions Functional Description The LCX138 high-speed 1-of-8 decoder/demultiplexer accepts three binary weighted inputs (A0, A1, A2) and, when enabled, provides eight mutually exclusive active- LOW outputs (O0–O7). The LCX138 features three Enable inputs, two active-LOW (E1, E2) and one active-HIGH (E3). All outputs will be HIGH unless E1 and E2 are LOW and E3 is HIGH. The LCX138 can be used as an 8-output demulti- plexer by using one of the active LOW Enable inputs as the data input and the other Enable inputs as strobes. The Enable inputs which are not used must be permanently tied to their appropriate active-HIGH or active-LOW state. Truth Table H = HIGH Voltage Level L = LOW Voltage Level X = Immaterial Pin Names Description A0–A2 Address Inputs E1–E2 Enable Inputs E3 Enable Input O0–O7 Outputs Inputs Outputs E1 E2 E3 A0 A1 A2 O0 O1 O2 O3 O4 O5 O6 O7 H X X X X X HHH HHH HH X H X X X X HHH HHH HH X X L X X X HHH HHH HH LL H LLL L H H H H H H H L L H H L L H L H HHH HH L L H L H L HH L HHH HH L L HH H L H H H L H HH H L L H L L H HHH H L H H H L L H H L H HHH HH L H H L L H L HH HHH HHH L H L L H HHH HHH HHH H L |
Nº de peça semelhante - 74LCX138M |
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Descrição semelhante - 74LCX138M |
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