Logic Families and Their Characteristics

Q1: The problem of the VOH(min) of a TTL IC being too low to drive a CMOS circuit and meet the CMOS requirement of VIH(min) is usually easily overcome by:

A adding a fixed voltage-divider bias resistive network at the output of the TTL device

B avoiding this condition and only using TTL to drive TTL

C adding an external pull-down resistor to ground

D adding an external pull-up resistor to VCC

ANS:D - adding an external pull-up resistor to VCC

No answer description is available.



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