The TC74HC390AP is a high-speed CMOS dual 4-stage decade counter manufactured by Toshiba Semiconductor and Storage. It incorporates two independent 4-stage counters within a single package, each capable of dividing an input frequency by 2 and by 5. These individual counters can be cascaded, allowing for the creation of counters with higher division ratios. It's suitable for applications requiring frequency division, timing, and control functions.

Applications

• Frequency Dividers: Used extensively to reduce the frequency of signals in electronic circuits.
• Timers: Implemented in timing applications for generating specific time intervals.
• Control Systems: Employed in digital control systems for event sequencing and counting.
• Clock Circuits: Found in digital clocks for dividing down the frequency from a crystal oscillator.
• Instrumentation: Used in instruments for measuring frequencies and periods.

Features

• Dual 4-Stage Decade Counter: Features two independent counters within a single IC.
• Divide-by-2 and Divide-by-5 Functionality: Each counter can divide the input by either 2 or 5.
• High-Speed Operation: Provides quick counting and frequency division operations.
• Low Power Consumption: Minimizes power usage, ideal for battery-operated devices.
• Wide Operating Voltage Range: Functions reliably across a voltage range of 2V to 6V.
• Cascadable Design: Allows counters to be linked together for increased division ratios.

Benefits

• Versatile Counting: Offers flexible division options suitable for diverse applications.
• Space-Saving Design: Integration of two counters reduces overall circuit size.
• High Performance: Fast operation ensures accurate counting in time-critical applications.
• Longer Battery Life: Low power usage contributes to extended battery performance.
• Design Adaptability: Broad voltage range suits various power supply conditions.
• Expandable Range: Enables design of counters with custom division requirements.

Additional Details

The TC74HC390AP is a dual decade counter. Each counter contains a divide-by-2 section and a divide-by-5 section. The divide-by-2 section is a single flip-flop, while the divide-by-5 section consists of a 4-stage counter with feedback. The counters are triggered on the negative-going edge of the clock input. An individual reset input is provided for each counter, which resets the counter to zero when asserted high. The device is packaged in a DIP16 package.