The 7490 / 74LS90 IC is a 4-bit binary decade counter with divide-by-2 and divide-by-5 counter sections. Packaged in DIP-14, it is widely used in digital clocks, frequency dividers, timers, and digital systems.
The CD4017 IC is a CMOS Decade Counter/Divider with 10 decoded outputs in a DIP-16 package. It advances one output high for each clock pulse, making it ideal for LED chasers, digital clocks, and sequencing applications.
The CD4033B is a CMOS decade counter and 7‑segment driver IC combining a 5‑stage Johnson counter with a 7‑segment decoder within a single 16-pin DIP or SOP package. It delivers counted outputs and decoded segment drivers, featuring ripple-blanking and lamp test support — ideal for numeric display interfaces.
The CD4033 CMOS Decade Counter Divider IC is a 5-stage Johnson decade counter with decoded 7-segment display outputs, available in a DIP-16 package. It is commonly used for digital counters, clocks, frequency dividers, and electronic timers.