vne147
Member
Ok. Test Resulted. Vcc 4.5 my small power supply will only do (3v-4.5v-6v-7.5v-12v) I don't have a five volt regulator. I think the data sheet was showing a little more for this Chip.
Anyhow I'm not sure what the value's should be based on the supply should I try 6v.
1A_H / 1B_H = 1Y_ 0.165v
1A_L / 1B_H = 1Y_3.069v
1A_H / 1B_L = 1Y_3.069v
1A_L / 1B_L = 1Y_ 0.159v
On page 4 of the data sheet for the 74LS86A the minimum Vcc is listed as 4.5V. It also says that with the minumun Vcc (i.e. 4.5V), the expected output voltage for the high condition (VOH) is 2.7 - 3.4V(typical). 3.069 is smack dab in the middle of that range. Translation, it's good. At least gate 1 of the chip is good. You'll have to repeat the procedure 3 more times to make sure all gates on the chip are working properly.