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
Reverse engineering the popular 555 timer chip (CMOS version)
555 timer teardown: inside the world's most popular IC
Making The World's Fastest 555 Timer, Or Using A Modern IC Version | Hackaday