1. Lecture No. 18 Combinational Functional Devices

2. Recap Decoder Decoder –3-to-8 Decoder –Cascading of Decoders 4-to-16 decoder –Implementing SOP & POS functions BCD to 7 Segment Decoder BCD to 7 Segment Decoder MSI BCD to 7 Segment Decoder MSI BCD to 7 Segment Decoder BCD to Decimal Decoder BCD to Decimal Decoder

3. Recap Encoder Encoder –Binary Encoder –Priority Encoder –Cascading Encoders –Decimal to BCD Encoder (keypad) Multiplexer Multiplexer –4-to-1 Multiplexer –Dual 4-to-1 Multiplexer

4. Multiplexer 2-Input 4-bit Mux (tab 1 fig 1) 2-Input 4-bit Mux (tab 1 fig 1) Expanding Mux Expanding Mux –8-input Mux 74X153 (tab 2 fig 2) –16-input Mux 74X153 (tab 3 fig 3) –2-input 8-bit Mux (fig 4)

5. MUX Applications Data Routing Data Routing –2-Digit Decimal Display circuit (fig 5) –Common Cathode/Anode Displays (fig 6) –2-Digit Mux based Display circuit (fig 7) Parallel to Serial (fig 8) Parallel to Serial (fig 8) Function Generators (fig 9) Function Generators (fig 9) Operation Sequencing (fig 10) Operation Sequencing (fig 10)