1. UNIT – V
CMOS LOGIC: CMOS logic levels, MOS transistors, Basic CMOS Inverter, NAND and NOR gates, CMOS AND-OR-INVERT and OR-AND-INVERT gates, Implementation of any function using CMOS logic. COMBINATIONAL CIRCUITS USING TTL 74XX ICS Study of logic gates using 74XX ICs, Four-bit parallel adder(IC 7483),Comparator(IC 7485), Decoder(IC 74138, IC 74154), BCD-to-7-segment decoder(IC 7447), Encoder(IC 74147), Multiplexer(IC74151), Demultiplexer (IC 74154). SEQUNTIAL CIRCUITS USING TTL 74XX ICS Flip Flops (IC 7474, IC 7473), Shift Registers, Universal Shift Register(IC 74194), 4- bit asynchronous binary counter(IC 7493).

2. CMOS LOGIC CMOS logic levels MOS transistors Basic CMOS Inverter
NAND and NOR gates
CMOS AND-OR-INVERT
OR-AND-INVERT gates
Implementation of any function using CMOS logic

3. INTEGRATED CIRCUIT TECHNOLOGIES FOR DIGITAL ICs
BIPOLAR TECHNOLOGY- SSI AND MSI
TTL (WIDELY USED)
ECL
UNIPOLAR TECHNOLOGY(MOSFET) - LSI, VLSI AND ULSI
CMOS
NMOS

4. TTL AND CMOS SERIES TTL SERIES CMOS SERIES(5V and 3.3V)
74 – Standard TTL (no letter)
74S- Schottky TTL
74AS – Advanc Schottky TTL
74LS – Low power Schottky TTL
74ALS-Advanced Low power Schottky TTL
74F-Fast TTL
HC – HIGH SPEED CMOS
AHC- ADVANCED HIGH SPPED CMOS
LV – LOW VOLATGE CMOS
HCT – HIGH SPEED CMOS AND TTL COMPATIBLE

5. MOS OVER TTL INEXPENSIVE AND EASY TO FABRICATE OCCUPIES LESS SPACE
CONSUMES LITTLE POWER
RESISTORS CAN BE CONSTRUCTED WITH MOSFETS
ACCOMODATES MORE NO. OF ELEMENTS THAN TTL IN SAME SPACE
SUITABLE FOR COMPLEX ICs

6. MOS TRANSISTORS DEPLETION MOSFET ENHANCEMENT MOSFET PMOS- NMOS-
ON(GATE VOLTAGE = LOGIC 0)
OFF(GATE VOLTAGE = LOGIC 1)
AND OPERATION IN A PARALLEL CONNECTIVITY
OR OPERATION IN A SERIES CONNECTIVITY
NMOS-
ON(GATE VOLTAGE = LOGIC 1)
OFF(GATE VOLTAGE = LOGIC 0)
AND OPERATION IN A SERIES CONNECTIVITY
OR OPERATION IN A PARALLEL CONNECTIVITY
BASICALLY USED AS A SWITCH

7. MOS TRANSISTORS
NMOS
PMOS
CMOS

8. NMOS OVER PMOS PACKAGE DENSITY IS MORE ABOUT THREE TIMES FASTER
MOSTLY MEMORIES, PROCESSORS AND PERIPHERAL DEVICES ARE AVALIABLE IN NMOS
PMOS AND NMOS ARE ECONOMICAL THAN CMOS

9. SYMBOL AND SWITCHING OF MOSFETs

10. NMOS AS RESISTOR, NAND AND NOR

11. NMOS CHARACTERISTICS INPUT IMPEDENCE HIGH INPUT CAPACITANCE IS HIGH
INPUT CURRENT IS LOW
FANOUT IS LARGE(TYPICALLY 30)
LOW OPERATING SPEED
PROPAGATION DELAY TIME IS LARGE(50nS)
POWER DISSIPATION IS SMALL COMPARED TO TTL (TYPICALLY 0.1mW/GATE)

12. PMOS TRANSISTORS AS NOR GATE

13. BASIC CMOS INVERTER

14. BASIC OPERATION OF CMOS INVERTER

15. CMOS NAND GATES

16. CMOS NOR GATE

17. CMOS AND-OR-INVERT
CMOS circuits can perform two levels of logic with just a single level of transistors. Y=

18. CMOS OR-AND-INVERT Y=

19. Problem
Design CMOS transistor circuit that has functional behaviour f(z)=
f(z)= =

20. Problems Design CMOS transistor circuit that has functional behaviour
1) f(z)=
2) f(z)=
3) f(z)=

21. CMOS LOGIC LEVELS

22. CMOS LOGIC LEVELS