Before revision: History A very early CD4029A counter IC, in 16-pin ceramic dual in-line package (DIP-16), manufactured by RCA The 4000 series was introduced as the CD4000 COS/MOS series in 1968 by RCA as a lower power and more versatile alternative to the 7400 series of transistor-transistor logic (TTL) chips.
After revision: Colorized IC and schematics of CD4011BE NAND gateHistory A very early CD4029A counter IC, in 16-pin ceramic dual in-line package (DIP-16), manufactured by RCA The 4000 series was introduced as the CD4000 COS/MOS series in 1968 by RCA as a lower power and more versatile alternative to the 7400 series of transistor-transistor logic (TTL) chips.