trying to decipher some logic datasheets and am curious,
recommended operating conditions are pretty obvious however i am wondering what is meant by "electrical characteristics over recommended operating free-air temperature range"
i would assume that the values stated are measured input/output values for that IC at various operating temperatures, however on a lot of datasheets some of the values stated are wildly different from those of the recommended operating conditions for example:
http://www.ti.com/lit/ds/symlink/cd54ac08.pdf
here IOL/IOH = +/-24mA in the recommended operating conditions,
yet when looking at the free air operating charistics chart under VOH at a Vcc of 1.5V-4.5V IOH = 5o micro amps, a few boxes bellow that at Vcc=4.5A IOH= 24mA
am i to understand that IOH can be set? is this just variation with load resistance or am i just misunderstanding what is meant by "electrical characteristics over recommended operating free-air temperature range".
recommended operating conditions are pretty obvious however i am wondering what is meant by "electrical characteristics over recommended operating free-air temperature range"
i would assume that the values stated are measured input/output values for that IC at various operating temperatures, however on a lot of datasheets some of the values stated are wildly different from those of the recommended operating conditions for example:
http://www.ti.com/lit/ds/symlink/cd54ac08.pdf
here IOL/IOH = +/-24mA in the recommended operating conditions,
yet when looking at the free air operating charistics chart under VOH at a Vcc of 1.5V-4.5V IOH = 5o micro amps, a few boxes bellow that at Vcc=4.5A IOH= 24mA
am i to understand that IOH can be set? is this just variation with load resistance or am i just misunderstanding what is meant by "electrical characteristics over recommended operating free-air temperature range".