The 7490 Decade Counter IC (DIP) is a high-performance digital integrated circuit designed for counting applications in digital electronics. It is a 4-bit binary counter that can count from 0 to 9 (decade mode) and automatically resets to zero, making it highly useful in applications requiring frequency division and numerical sequencing.
Internally, the IC is built with JK flip-flops and logic gates, allowing it to function as a divide-by-2, divide-by-5, or divide-by-10 counter, depending on how it is wired. This flexibility makes the 7490 a fundamental building block in counters, frequency dividers, and digital display circuits.
The IC is packaged in a Dual In-line Package (DIP), which makes it easy to use on breadboards, stripboards, and custom PCBs, making it a favorite among students, hobbyists, and engineers.
Key Features:
- 4-bit binary counter (counts from 0–9).
- Configurable as divide-by-2, divide-by-5, or divide-by-10.
- Automatic reset after reaching 9.
- Asynchronous master reset inputs.
- TTL compatible (fast switching).
- Standard DIP package for easy prototyping.
Common Applications:
- Digital clocks and timers.
- Frequency counters and dividers.
- Event counters and sequence generators.
- Driving seven-segment displays.
- Learning and teaching digital electronics.
The 7490 Decade Counter IC is a reliable and essential IC for anyone working with sequential logic, digital counting systems, or timing circuits.
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