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Encoders and Decoders
ENGI 251ELEC 241
General Decoder Diagram
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Decoder for the Binary Pattern 1001
Decoder
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The 74ALS138 Decoder
3-line-to-8-line (1-of-8) Decoder
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The 74ALS138 Decoder
Four 74AS138s forming a 1-of-32 decoder
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7442A BCD-to-Decimal Decoder/Driver
7442 BCD-to-decimal decoder
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7442 Waveform Diagram
A 4-line-to-16-line Decoder/DeMux
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74154 4-line-to-16-line Decoder/DeMux
Function Table
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A 5-line-to-32-line Decoder
Seven Segment Display
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7-Segment Display
LED 7-segment Display with Driver Circuitry
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LCD Display
Driving an LCD a 7-segment Display
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Passive Matrix LCD
Encoders
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General Encoder Diagram
An Octal-to-Binary (8-line-to-3-line) Encoder
For proper operation, only one input should be active at one time
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74147 Decimal-to-BCD Priority Encoder
Decimal-to-BCD Switch Encoder