Schottky TTL Logic Family
Schottky TTL logic family, also known as Schottky transistor-transistor logic, is a type of digital logic family that uses Schottky diodes in its input and output circuits. It is known for its high speed capability and low power consumption compared to other TTL logic families. However, it does not possess the feature of high propagation delay.

Good Fan-In
Fan-in refers to the number of inputs that a gate can handle. Schottky TTL logic family typically has good fan-in, meaning that it can handle a large number of inputs. This is advantageous in complex digital circuits where multiple signals need to be processed simultaneously.

Good Fan-Out
Fan-out refers to the number of inputs that a gate can drive without compromising its performance. The Schottky TTL logic family generally has good fan-out, allowing it to drive multiple gates or devices without experiencing significant degradation in signal quality.

High Speed Capability
One of the key advantages of the Schottky TTL logic family is its high speed capability. This is due to the use of Schottky diodes, which have a fast switching speed. The Schottky diodes in the input and output circuits reduce the voltage drop and improve the overall performance of the logic gates, enabling them to operate at higher frequencies.

High Propagation Delay
Propagation delay refers to the time it takes for a signal to propagate through a logic gate or circuit. A high propagation delay means that the output signal of a gate will take longer to stabilize after a change in the input signal. However, the Schottky TTL logic family is not known for high propagation delay. In fact, it has relatively low propagation delay compared to other TTL logic families, which contributes to its high speed capability.

Conclusion
In summary, the Schottky TTL logic family exhibits good fan-in, good fan-out, and high speed capability. However, it does not have high propagation delay. This makes it suitable for applications that require high-speed operation and efficient signal handling.