Digital Electronics: Principles, Devices and Applications

Logic Gates and Related Devices 97+V +V +V +VONIOHIIHIIHIIHOFF(a)+V +V +V +VIILIILIILOFFONIOL(b)Figure 4.39Fan-out of the standard TTL logic family.Example 4.14A certain logic family has the following input and output current specifications:1. The maximum output HIGH-state current = 1mA.2. The maximum output LOW-state current = 20 mA.3. The maximum input HIGH-state current = 50 A.4. The maximum input LOW-state current = 2mA.