What is the typical operating voltage range for the standard TTL logic family?
2025
What is the typical operating voltage range for the standard TTL logic family?
- A.
1.8 V to 3.3 V
- B.
4.75 V to 5.25 V
- C.
5.0 V to 12 V
- D.
-5.0 V to 5.0 V
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Correct answer: B
Correct answer: 4.75 V to 5.25 V.
TTL (Transistor-Transistor Logic) uses a nominal 5 V supply. Standard 74-series TTL devices are normally specified around 5 V with tolerance, commonly 4.75 V to 5.25 V.
Lower ranges such as 1.8 V to 3.3 V belong to low-voltage logic families, while 12 V or negative-voltage ranges are not standard TTL operating supplies.