9.3. Logic Families
TTL (Bipolar Junction Transistor Logic)
First technology to get to market CMOS (Complementary Metal Oxide Semiconductor)
Used for low power Integrated-Injection Logic (I^2 L)
Bipolar Transistor and Open-collector output used for the wired-AND function. Emitter-Coupled Logic (ECL)
High-speed and high-power-requirement solutions.