Ted's 555 Lookup TableThe 555 has the following components inside
24 Transistors, 17 Resistor and 2 Diodes 4 Sections internally
Pin 6 - Threshold Comparator
Pin 2 - Trigger Comparator
Pin 4 - Reset - Pin 7 - Discharger (flipflop circuit) tied to Pin 5 Control Voltage
Pin 3 - Output
Pin 1 - Ground Pin 8 - VCC
How's that for an 8-PIN Chip!