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You are here: Home / Replies / These are two logic levels

These are two logic levels

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Miscellaneous › Others › Digital electronics › These are two logic levels

April 10, 2012 at 7:42 pm #7411
AJISH ALFRED
Participant

These are two logic levels foud in ICs. TTL and CMOS, both having different voltage ranges for representing logic 0 and logic 1.

TTL:

input

logic 0—-> 0 to 0.8V, logic 1


> 2 to 5V

output

logic 0—-> 0 to 0.5V, logic 1


> 2.7 to 5V

 

CMOS:

input

logic 0—-> 0 to 1.5V, logic 1


> 3.5 to 5V

output

logic 0—-> 0 to 0.05V, logic 1


> 4.95 to 5V 

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