I got 2 samples of LP2905CZ (TO-92) voltage regulator. First sample is made by TI and second on by On Semiconductor. Links of the datasheets:
Due to ignorance, I just read the datasheet of On Semiconductor and started to test the two regulators but later discovered that the TI one does not work. After trying to check all breadboard connections, I thought to check the data sheet of TI one which revealed some interesting finding.
For the On Semiconductor:
PIN 1: Output PIN 3 = INPUT
PIN 1: Input PIN 3 = INPUT
I understand that I should have checked the datasheet before hooking these, but my question is why do the manufacturers don't follow a logic layout (e.g. PIN 1 = INPUT and 3 = OUTPUT like all(!) LM7805)