Digital Electronics - Integrated-Circuit Logic Families - Discussion

Discussion Forum : Integrated-Circuit Logic Families - General Questions (Q.No. 27)

Integrated-Circuit Logic Families

27.

Refer to the figure given below. What type of device is shown and what input levels are required to turn the LED off?

The device is an open-collector AND gate and requires both inputs to be HIGH in order to turn the LED off.

The device is a Schottky AND gate and requires only one low input to turn the LED off.

The device is an open-collector AND gate and requires only one low input to turn the LED off.

The device is a Schottky open-collector AND gate and requires a low on both inputs to turn the LED off.

Answer: Option

Explanation:

No answer description is available. Let's discuss.

Discussion:

1 comments Page 1 of 1.

John mcmillan said: 1 decade ago

Does that say -5V at the top? if so, it probably doesn't matter what the input states are. The LED will never light.

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