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What should be done with the unused inputs of a TTL integrated circuit?
Wiki User
∙ 15y ago
Unused ttl inputs would normally default to logic 1 if left floating. but these inputs could act as antennas under certain conditions and they could pick up noise which can cause the circuit to malfunction. it is better to tie unused inputs to Vcc through a 1k resistor (74LS, 74XX etc) or simply return the inputs to ground. for most other ttl families, the 1k resistor might not be required.- Stan (Nigeria)
Wiki User
∙ 15y ago
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Why do TTl integrated circuits assume unconnected inputs to be at logic?
Unused ttl inputs would normally default to logic 1 if left floating. but these inputs could act as antennas under certain conditions and they could pick up noise which can cause the circuit to malfunction.
What should be done with the unused inputs of a cmos integrated circuit?
tied high through a pullup resistor or grounded, never left open or they will pickup noise that may perturb other devices in the package that are used.
What should be done with unused TTL output?
Unused TTL inputs should never be left open. Depending on how their logic levels will affect the operation you want from the device, unused inputs should always be tied to either the +5v supply (logic 1) or to the circuit ground (logic 0). If an input is left open ("floating"), then it can assume either logic level, and you literally never know which state it's in.
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If unused chemicals are not poured back into their containers, they will be wasted. Also, they could be dangerous and should not be left lying around.
What are names of Philippine typhoons in 2011?
Amang (02W)Bebeng (1101)Chedeng (1102)Dodong (1103)Egay (1104)Falcon (1105)Goring (active)Hanna (unused)Ineng (unused)Juaning (unused)Kabayan (unused)Lando (unused)Mina (unused)Nonoy (unused)Onyok (unused)Pedring (unused)Quiel (unused)Ramon (unused)Sendong (unused)Tisoy (unused)Ursula (unused)Viring (unused)Weng (unused)Yoyoy (unused)Zigzag (unused)Abe (unused)Berto (unused)Charo (unused)Dado (unused)Estoy (unused)Felion (unused)Gening (unused)Herman (unused)Irma (unused)Jaime (unused)
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