IO ICs - CT237B CommonI/OICs RolandFernandez CompE Outline...

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CT 237B Common I/O IC’s Roland Fernandez Comp E
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Outline Decoder Buffer Transciever Latches
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Decoder decoder  can take the form of a multiple-input,  multiple-output  logic  circuit  that  converts  coded  inputs  into  coded  outputs,  where  the  input  and  output codes are different. decoder  is a device which does the reverse of  an  encoder,  undoing  the  encoding  so  that  the  original information can be retrieved. 
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74LS139A (DUAL 2-LINE TO 4-LINE  DECODER)
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74LS139A (DUAL 2-LINE TO 4-LINE  DECODER) 74 LS1 39 2 3 1 4 5 6 7 A B G Y0 Y1 Y2 Y3 Function Table: INPUTS OUTPUTS Enable Select G’ B A Y0 Y1 Y2 Y3 1 X X 1 1 1 1 0 0 0 0 1 1 1 0 0 1 1 0 1 1 0 1 0 1 1 0 1 0 1 1 1 1 1 0
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74LS139A (DUAL 2-LINE TO 4-LINE  DECODER)
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74LS138 (3-LINE TO 8-LINE  DECODER)
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DECODER) 74 LS1 38 1 2 3 1 5 1 4 1 3 1 2 1 1 1 0 9 7 6 4 5 A B C Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 G1 G2A G2B Function Table : INPUTS OUTPUTS Enable Select G1 G’2 C B A Y0 Y1 Y2 Y3 Y4 Y5 Y6 Y7 X 1 X X X 1 1 1 1 1 1 1 1 1 X X X X 1 1 1 1 1 1 1 1 1 0 0 0 0 0 1 1 1 1 1 1 1 1 0 0 0 1 1 0 1 1 1 1 1 1 1 0 0 1 0 1 1 0 1 1 1 1 1 1 0 0 1 1 1 1 1 0 1 1 1 1 1 0 1 0 0 1 1 1 1 0 1 1 1 1 0 1 0 1 1 1
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IO ICs - CT237B CommonI/OICs RolandFernandez CompE Outline...

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