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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.

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What should be done with the unused inputs of a TTL integrated circuit?

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)


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 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.


How are unused OR gate inputs terminated?

The OR gate gets connected to Ground.


Does all inputs need to be used in order for HDMI switcher to work?

No. At least two inputs are the mimimum that makes a switcher viable, but unused inputs can always be left disconnected.


If not connected to a ground or logic high signal TTL inputs A) are invalid. B) are logic low. C) are considered logic high. D) automatically go to Hi-Z mode.?

If not connected to a ground or logic high signal, TTL inputs A) are invalid. This means that the input may pick up noise and could fluctuate between states, leading to unreliable circuit behavior. It's important to properly terminate unused inputs to prevent them from floating and causing undefined states.


Why should you pour unused chemicals back into their bottles?

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.


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Where are the best places to sell or buy a circuit breaker?

If you have Circuit Breaker Buyers, finding the right buyer is noteworthy. Double-D-Circuitbreakers interface you with the best circuit breaker buyers, guaranteeing you get the most great deal. With a long experience within the industry, Double-D-Circuitbreakers is your go-to assistant for selling electrical equipment quickly and beneficially. Circuit breakers are fundamental components in electrical systems, but they can collect as flood amid updates or decommissioning ventures. Selling your unused circuit breakers may be a sharp money-related move. Here's why Circuit Breaker Buyers can be turned into cash. Instead of letting them sit unused, selling them to a dependable buyer can provide provoke financial returns. Unused equipment takes up beneficial space.


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How many 5 amp TVs can be plugged into a open circuit?

You can plug in as many as you want but none of them will work. An "open" circuit is an electrical circuit which is not a complete circuit and therefore electricity will not flow through it. If you mean an unused circuit,which has no load on it, then the answer is 2 ea. 5 amp devices on a 15 amp circuit and 3 ea. 5 amp devices on a 20 amp circuit. The reason for this is that any circuit is not to be "loaded" more than 80% of the OCPD (circuit breaker amperage rating.