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• 1. Number Systems
• 2. Digital Logic
• 3. Logic Families
• 4. Combinational Logic
• 5. Sequential Logic

Module 3.5

Logic Families Quiz

Try our quiz, based on the information you can find in Digital Electronics Module 3 - Logic Families. Submit your answers and see how many you get right. If you get any answers wrong, just follow the hints to find the right answer and learn about the Logic IC Families used in digital electronics as you go.

• a) Operating temperature range.
• b) Manufacturers ID code.
• c) Package type.
• d) Logic sub family.

2.

On DIP14 74 series ICs containing basic logic gates, which pins are commonly used for power supply connections?

• a) +Vcc = 14, 0V = 7
• b) +Vcc = 11, 0V = 4
• c) . +Vcc = 7, 0V = 14
• d) +Vcc = 4, 0V = 11

3.

In Fig. 3.5.1, if input A is at logic 1 and input B is at logic 0, what will be the approximate voltage across R3?

• a) 5V.
• b) 2.5V.
• c) 0.7V
• d) 0v

4.

What is he main advantage of PECL gates Over ECL gates?

• a) They use positive logic.
• b) They can dissipate more power than ECL.
• c) They use a positive power supply.
• d) Their propagation delay is measured in picoseconds.

5.

What does the V_OH parameter of a logic IC refer to?

• a) The highest permissible output voltage.
• b) The lowest output voltage recognised as logic 1.
• c) The highest output voltage recognised as logic 1.
• d) The highest output voltage recognised as logic 0.

6.

Which of the following refers to the noise margin of a logic gate?

• a) The difference between V_IH and V_OL.
• b) The difference between V_OH and V_OL.
• c) The difference between V_OH and V_IH.
• d) The difference between V_IH and V_IL

7.

Which of the following ICs has the largest noise margin?

• a) SN74LS04n Hex inverter.
• b) CD74HCT00N Quad 2 input NAND.
• c) MC10EL05 2 input ECL AND/NAND.
• d) SN7408N Quad 2 input TTL AND

8.

What logic function is achieved by operation an AND gate using negative logic?

• a) AND.
• b) NAND.
• c) NOR.
• d) OR.

9.

Refer to Fig. 3.5.2. Which of the following input combinations will cause output X to sink current?

• a) A=0 B=0.
• b) A=0 B=1.
• c) A=1 B=0.
• d) A=1 B=1

10.

For which of the following purposes would a Schmitt buffer be chosen?

• a) To provide a high output current.
• b) To enable wired logic to be used.
• c) To reduce noise at the circuit input.
• d) To translate logic levels when interfacing between logic families.

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