Octal inverter

Thread Starter

markmc001

Joined Mar 10, 2008
12
I am putting together a pcb for an octal inverter (MM74HC240) to replace a hex inverter circuit in a system. The hex inverter IC simply has 6-inputs, 6-outputs, a 5V and a ground. The octal inverter has the 8 normal inputs and outputs and the supply but there are two other pins that connect to the inputs/outputs. What do these do?

Thanks in advance,
MM
 

bertus

Joined Apr 5, 2008
20,650
Hello,

These extra pins are enable pins.
With these pins you can make the outputs high-Z.
See extract from datasheet.

Greetings,
Bertus
 

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mik3

Joined Feb 4, 2008
4,843
I am putting together a pcb for an octal inverter (MM74HC240) to replace a hex inverter circuit in a system. The hex inverter IC simply has 6-inputs, 6-outputs, a 5V and a ground. The octal inverter has the 8 normal inputs and outputs and the supply but there are two other pins that connect to the inputs/outputs. What do these do?

Thanks in advance,
MM
Before you use a component you should read its datasheet carefully before use it. The datasheet contains information about the pin configuration, the electrical ratings of the component as not to burn it out etc.
 
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