E6C04 (C)
What level of input voltage is a logic "low" in a TTL device operating with a positive 5-volt power-supply?
A. -2.0 to -5.5 volts
B. 2.0 to 5.5 volts
C. 0.0 to 0.8 volts
D. -0.8 to 0.4 volts
