74HC393D

The 74HC393D is a dual 4-bit binary counter integrated circuit (IC) manufactured by Toshiba, part of the 74HC (High-speed CMOS) series. This IC is designed for counting applications and is commonly used in digital circuits for frequency division, event counting, and time measurement.

Key Features:

1. Dual 4-Bit Counters: The 74HC393D contains two independent 4-bit binary counters, allowing for simultaneous counting operations. Each counter can count from 0 to 15 (binary 0000 to 1111).

2. Asynchronous Reset: Each counter has an asynchronous reset input (active low), which allows the counters to be reset to zero regardless of the clock state. This feature is useful for initializing the counters in various applications.

3. Clock Input: The counters are triggered on the rising edge of the clock input. This means that the count will increment with each rising edge of the clock signal, making it suitable for synchronous counting applications.

4. Count Enable: Each counter has a count enable input, which allows the counting operation to be controlled. When the count enable input is high, the counter will increment on each clock pulse; when low, the counter will hold its current value.

5. Output: The outputs of the counters are in binary format, providing four output pins for each counter (Q0 to Q3). These outputs can be used to drive other digital circuits or display devices.

6. Power Supply: The 74HC393D operates over a wide voltage range, typically from 2V to 6V, making it compatible with various logic levels. It has low power consumption, which is a characteristic of CMOS technology.

7. Temperature Range: The IC is designed to operate within a standard temperature range, making it suitable for various applications in consumer electronics, industrial equipment, and automotive systems.

8. Package Type: The "D" in the part number indicates that the IC is available in a DIP (Dual In-line Package) format, which is easy to handle and solder onto PCBs. It typically has 16 pins.

Applications:

• Frequency Division: The 74HC393D can be used in frequency division applications, where the output frequency is a fraction of the input frequency.
• Event Counters: It can count events in applications such as digital clocks, timers, and other counting devices.
• Digital Logic Circuits: The IC can be integrated into larger digital systems for various counting and timing functions.

Pin Configuration:

The typical pin configuration for the 74HC393D includes:

• Pin 1: Counter 1 (A) Clock Input
• Pin 2: Counter 1 (A) Reset
• Pin 3: Counter 1 (A) Count Enable
• Pin 4: Counter 1 (A) Output Q0
• Pin 5: Counter 1 (A) Output Q1
• Pin 6: Counter 1 (A) Output Q2
• Pin 7: Counter 1 (A) Output Q3
• Pin 8: Ground (GND)
• Pin 9: Counter 2 (B) Clock Input
• Pin 10: Counter 2 (B) Reset
• Pin 11: Counter 2 (B) Count Enable
• Pin 12: Counter 2 (B) Output Q0
• Pin 13: Counter 2 (B) Output Q1
• Pin 14: Counter 2 (B) Output Q2
• Pin 15: Counter 2 (B) Output Q3
• Pin 16: VCC (Power Supply)

Conclusion:

The 74HC393D from Toshiba is a versatile and efficient dual 4-bit binary counter that is widely used in digital electronics. Its features, such as asynchronous reset, count enable, and low power consumption, make it suitable for a variety of applications in counting and timing.