Which TTL sub-family has maximum speed? A. standard TTL B. schottky-clamped TTL C. high speed TTL D. low power TTL E. None of the above

The correct answer is: C. high speed TTL

Standard TTL is the slowest of the TTL sub-families, followed by Schottky-clamped TTL, then low power TTL. High speed TTL is the fastest.

Standard TTL is the original TTL logic family. It is relatively slow and consumes a lot of power.

Schottky-clamped TTL is a faster version of standard TTL that uses Schottky diodes to reduce switching time.

Low power TTL is a more power-efficient version of standard TTL. It is slower than Schottky-clamped TTL, but faster than standard TTL.

High speed TTL is the fastest of the TTL sub-families. It is used in applications where speed is critical, such as high-speed data transfer.