Electronics lec 10
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This document discusses basic logic gates used in electronics. It describes the AND, OR, NOT, NAND, NOR, and exclusive OR logic gates. For each gate, it provides the Boolean equation that represents the function and explains when the output is true. It also lists common integrated circuit chip families that are used to implement each gate type in both TTL and CMOS logic technologies.
Electronics lec 10
- 1. Electronics an Introduction Eng. : Mohamed ElKenany
- 2. Contoso S u i t e s 2 Electronics :-
- 3. Contoso S u i t e s 3 Electronics :- ▪ AND Universal Logic Gates ▪ The AND function is represented in Boolean Algebra by a single “dot” ( . ) so for a two input AND gate the Boolean equation is given as: Q = A . B If both A and B are true, then Q is true Q = (A.B).(C.D).(E.F) TTL Logic AND Gate ▪ 74LS08 Quad 2-input ▪ 74LS11 Triple 3-input ▪ 74LS21 Dual 4-input CMOS Logic AND Gate ▪ CD4081 Quad 2-input ▪ CD4073 Triple 3-input ▪ CD4082 Dual 4-input
- 4. Contoso S u i t e s 4 Electronics :- ▪ OR Q = (A+B)+(C+D)+(E+F) TTL Logic OR Gates ▪ 74LS32 Quad 2-input CMOS Logic OR Gates ▪ CD4071 Quad 2-input ▪ CD4075 Triple 3-input ▪ CD4072 Dual 4-input the OR function is represented by a “plus” sign (+) so for a two input OR gate the Boolean equation is given as: Q = A+B A or B is true, then Q is true
- 5. Contoso S u i t e s 5 Electronics :- ▪ NOT A is NOT true, then Q is true TTL Logic NOT Gates ▪ 74LS04 Hex Inverting NOT Gate ▪ 74LS14 Hex Inverting NOT Gate ▪ 74LS1004 Hex Inverting Drivers CMOS Logic NOT Gates ▪ CD4009 Hex Inverting NOT Gate ▪ CD4069 Hex Inverting NOT Gate The NOT function is not a decision making logic gate like the AND, or OR gates, but instead is used to invert or complement a digital signal.
- 6. Contoso S u i t e s 6 Electronics :- ▪ NAND A and B are true, then Q is NOT true TTL Logic NAND Gates ▪ 74LS00 Quad 2-input ▪ 74LS10 Triple 3-input ▪ 74LS20 Dual 4-input ▪ 74LS30 Single 8-input CMOS Logic NAND Gates ▪ CD4011 Quad 2-input ▪ CD4023 Triple 3-input ▪ CD4012 Dual 4-input
- 7. Contoso S u i t e s 7 Electronics :- ▪ NOR TTL Logic NOR Gates ▪ 74LS02 Quad 2-input ▪ 74LS27 Triple 3-input ▪ 74LS260 Dual 4-input CMOS Logic NOR Gates ▪ CD4001 Quad 2-input ▪ CD4025 Triple 3-input ▪ CD4002 Dual 4-input
- 8. Contoso S u i t e s 8 Electronics :- ▪ Logic
- 9. Contoso S u i t e s 9 Electronics :- ▪ Logic
- 10. Contoso S u i t e s 10 Electronics :- ▪ Exclusive - OR TTL Logic Ex-OR Gates ▪ 74LS86 Quad 2-input CMOS Logic Ex-OR Gates ▪ CD4030 Quad 2-input
- 11. Contoso S u i t e s 11 Electronics :- ▪ Exclusive - NOR