1. Transistor-Transistor Logic (TTL) Lecture L4.1

2. Transistor-Transistor Logic (TTL) Developed in mid-1960s Large family (74xx) of chips from basic gates to arithmetic logic units Becoming obsolete with the development of programmable logic devices (PLDs)

3. TTL Chips

4. TTL NAND, NOR, XOR

5. TTL Multiple-input Gates

6. Small-Scale Integrated (SSI) Circuits 1 to 10 gates NAND gate has 4 transistors

7. Medium-Scale Integrated (MSI) Circuits 10-100 gates Adders Comparators Multiplexers Decoders

8. Large-Scale Integrated (LSI) Circuits 100-1000 gates Arithmetic Logic Units

9. Very-Large-Scale Integrated (VLSI) Circuits >1000 gates Microprocessors Programmable Logic Devices (PLDs) Complex Programmable Logic Devices (CPLDs) Field Programmable Gate Arrays (FPGAs)