Dears,
Pin 12 and pin 13 have the same voltage, and pin 14 and pin 15 have the same voltage
When the voltage of pin 12 and pin 13 is 3.55v, the voltage of pin 14 and pin 15 jumps to 4.99v
Now, 6 chips are tested, and 2 of them can follow, but the voltage has a deviation of a few tenths of a volt. The other 4 chips jump to 4.99v after exceeding 3.55v,
Theoretically, the voltages of the four pins 12, 13, 14, 15 are the same
But the actual situation is not,Please kindly help analyze the possible reasons. Thanks!