anyone know wat is TTL?

[louislu]

hello...TTL is one of the buffer type.it is a input pin for my chip.but i donno wat is TTL...and what is it used for?do i need to take care of it when connecting my circuit...thanks

 

[0mega]

Transistor to Transistor Logic.

CMOS is static sensitive, but has higher input threshold.

 

[fat-tony]

We could probably help out some more if you gave more detail. As was said, TTL is transistor-transistor logic. Typically, you have a low value if the voltage is less than 0.4V, and a high value if the voltage is greater than 2.4V. Anywhere in between is indeterminate.

What chip are you using? It's spec sheet will probably have better values for you.

 

[louislu]

Thanks for your replies...according to your reply,for voltage below 0.4V will give us low logic and if greater 2.4V is high-logic right? The chip i m using is MCP2120.here i would like to focus on one of the input pin which is belong to TTL buffer type.i m not goin to use this pin but do i need to connect this pin to Vdd or Vss.if i leave the pin without commection would it affect my chip operation...Thanks in advance....