555 circuit doubt

Hello friends,

I have a doubt in internal circuit of 555 IC. In web there are two types of circuit which are making hard to undersatand the circuit operation. Im attaching the two pictures here. Please guide me which is the correct one.

In the above two circuit which is the correct one? In first circuit the trigger pin is NEGATIVE of OP-AMP where as in second circuit its POSITIVE of OP-AMP. Also the threshold pins are reversed. Which is the correct circuit to be followed. Help please

The first picture is correct.. If you ever need a clarification.. just follow datasheet

@Ajay Bhargav

Thank you sir I saw the datasheet but only the block diagram was given i wanted to know the internal circuit. so

Did you check page 3 of datasheet? it's Functional block diagram of 555 Timer.

@Ajay Bhargav

Sir im attaching the datasheet. In tat data sheet in first page there is a block diagram tats it. after that there is application notes.