Digital Design - Technical MCQs

Q1:

The output of a standard TTL NAND gate is used to pull an LED indicator LOW. The LED is in series with a 470- resistor. What is the current in the circuit when the LED is on?

A 7.02 mA

B 8.51 mA

C 10.63 mA

D 5.32 mA

ANS:A - 7.02 mA

No answer description is available.