The HD7490AP is a decade counter manufactured by Hitachi. It is a monolithic counter that provides a divide-by-two and a divide-by-five counter in a single package.

Applications

• Frequency dividers
• Digital clocks
• Timers
• Control circuits
• Event counters

Features

• Divide-by-two and divide-by-five counters in one package
• BCD (Binary-Coded Decimal) output
• High-speed operation
• Reset inputs for counter initialization
• TTL compatible

Benefits

• Reduces component count in digital designs
• Simplifies circuit design for frequency division and counting applications
• Provides BCD output for easy interface with display devices
• Offers high-speed counting capabilities
• Easy to interface with other TTL logic circuits

Technical Specifications

The HD7490AP is a TTL device, operating on a +5V power supply. It features separate reset inputs for the divide-by-two and divide-by-five counters. The maximum clock frequency depends on the specific variant, but is typically in the MHz range. The BCD output allows for direct interfacing with BCD-to-7-segment decoders for display applications. The device is housed in a 14-pin DIP package.

The counter can be configured to count in various modes, including BCD decade counting. The two independent counters provide flexibility in design, allowing for different division ratios and counting sequences.