Which of the following does not belong to TTL subclasses?

Which of the following does not belong to TTL subclasses? Correct Answer 74A

Transistor-Transistor Logic (TTL):

The Transistor-Transistor Logic (TTL) is a logic family made up of BJTs (bipolar junction transistors).

The TTL family consists of various subfamilies such as standard TTL, low-power TTL, high power TTL, low power Schottky TTL, Schottky TTL, advanced low-power Schottky TTL, advanced Schottky TTL, and fast TTL.

The ICs which belong to the TTL family are designated as follows: 74 or 54 for standard TTL, 74L or 54L for low-power TTL, 74H or 54H for high power TTL, 74ALS or 54ALS for Low power Schottky TTL, and so on.

TTLs are available in different types and their classification is done based on the output like the following.

• Standard TTL
• Fast TTL
• Schottky TTL
• High Power TTL
• Low Power TTL
• Advanced Schottky TTL