CD74HCT4040E

The CD74HCT4040E is a high-speed CMOS (Complementary Metal-Oxide-Semiconductor) binary ripple counter, designed for use in various digital applications. It is part of the Texas Instruments CD74HCT series, which is known for its compatibility with TTL (Transistor-Transistor Logic) levels while providing the advantages of CMOS technology, such as low power consumption and high noise immunity.

Key Features:

1. Counter Functionality: The CD74HCT4040E is a 12-stage binary ripple counter, capable of counting from 0 to 4095 in binary form. It can be used in applications requiring counting, frequency division, or time delay generation.

2. Input and Output: The device has multiple inputs for clock and reset functions, as well as several outputs that represent the current count in binary format. The outputs are typically in the form of Q0 to Q11, where Q0 is the least significant bit (LSB) and Q11 is the most significant bit (MSB).

3. Clock Input: The counter increments its count on the rising edge of the clock signal. It can handle a wide range of clock frequencies, making it suitable for various timing applications.

4. Reset Functionality: The CD74HCT4040E includes a reset input that allows the user to set the counter back to zero. This feature is essential for applications that require periodic resets.

5. Power Supply: The device operates over a wide voltage range, typically from 4.5V to 5.5V, making it compatible with standard digital logic levels. It has low power consumption, which is beneficial for battery-operated devices.

6. Temperature Range: The CD74HCT4040E is designed to operate within a specified temperature range, typically from -40°C to +85°C, ensuring reliability in various environmental conditions.

7. Package Options: The device is available in several package types, including DIP (Dual In-line Package) and SOIC (Small Outline Integrated Circuit), allowing for flexibility in PCB design and assembly.

8. Applications: Common applications for the CD74HCT4040E include digital clocks, frequency counters, event counters, and timers. Its ability to interface with other digital logic devices makes it a versatile component in digital circuit design.

Electrical Characteristics:

• Propagation Delay: The propagation delay time from the clock input to the output can vary based on the load and operating conditions, but it is typically in the range of nanoseconds, allowing for high-speed operation.
• Input and Output Logic Levels: The device is designed to recognize standard TTL logic levels, ensuring compatibility with other TTL and CMOS devices.

Conclusion:

The CD74HCT4040E from Texas Instruments is a robust and versatile binary counter that combines the benefits of CMOS technology with TTL compatibility. Its features make it suitable for a wide range of digital applications, from simple counting tasks to more complex timing and frequency division functions. With its low power consumption and reliable performance, it is a popular choice among engineers and designers in the field of digital electronics.