ERH India (Pack of 100) NE555 NE555P DIP-8 555 Timer-Based IC Genuine 555 Timer IC with 8 Pin Base for Electronic Projects : Amazon.in: Industrial & Scientific
b>Electronics Components: How the 555 Timer Chip Works</b> - dummies
TLC551 IC Timer - CMOS 555 with 1V to 15V power, up to 1.8MHz [TLC551CP] : ID 5222 : $3.95 : Adafruit Industries, Unique & fun DIY electronics and kits
555 Timer IC - Features, Pinout, Working, Circuit, Operating Modes
50 Years of the NE555 Timer Integrated Circuit | BitBox
Silicon die teardown: a look inside an early 555 timer chip