Logic Families – Exercise – 3

116. A standard TTL circuit with a totem-pole output can sink, in the LOW state (IOL(max)), ________.

(a) 16 mA
(b) 20 mA
(c) 16 A
(d) 20 A

Answer
Answer : (a)
Explanation
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117. An open-drain gate is the CMOS counterpart of ________.

(a) an open-collector TTL gate
(b) a tristate TTL gate
(c) a bipolar junction transistor
(d) an emitter-coupled logic gate

Answer
Answer : (a)
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118. Which is not a precaution for handling CMOS?

(a) Devices should be placed with pins down on a grounded surface, such as a metal plate.
(b) All tools, test equipment, and metal workbenches should be earth grounded.
(c) CMOS devices should not be inserted into sockets or PC boards with the power on.
(d) Wear wool clothes at all times.

Answer
Answer : (d)
Explanation
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119. One output structure of a TTL gate is often referred to as a ________.

(a) totem-pole arrangement
(b) diode arrangement
(c) JBT arrangement
(d) base, emitter, collector arrangement

Answer
Answer : (a)
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120. The active switching element used in all TTL circuits is the ________.

(a) bipolar junction transistor (BJT)
(b) field-effect transistor (FET)
(c) metal-oxide semiconductor field-effect transistor (MOSFET)
(d) unijunction transistor (UJ)

Answer
Answer : (a)
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