74ACT163PC

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The 74ACT163PC is a synchronous presettable binary counter which uses a synchronous load input, CLK, and parallel inputs (D0–D7) to create a counter values from 0–255. It also includes an asynchronous clear input (CLR) which can be used to reset the counter value to zero. It is specifically designed for use in high-performance memory address and data-path applications, providing high speed operation with three-state outputs.

The 74ACT163PC is ideal for applications involving counting or timing, such as memory address generators, frequency dividers, D/A and A/D converters, modulo-n counters, traffic light control systems, encoder/decoder applications, and shift register operations. It can also be used as a buffer, latch, or oscillator. This type of IC is also relatively low in power consumption, which makes it a suitable option when designing low-power digital systems.

Working Principle

The 74ACT163PC is a clocked 8-bit binary presettable counter. It contains a synchronous 4-bit binary counter, a synchronous presettable 4-bit binary counter, and a synchronous parallel load register. It has a clear input terminal (CLR) which can preset (clear) the counter to its zero state. A low on the CLR terminal presets the output to 0000. The CLK signal determines when the counter will count. When CLK is LOW, the counter is prevented from counting. The clock input can be disabled when CLK is in its HIGH state.

When CLK is in its LOW state, new data can be presented at the D input pins of the synchronous parallel load register and will be loaded into the memory cell once CLK goes HIGH conditions. Data in the memory cells will then be shifted to the output pins on the next LOW-to-HIGH transition of the clock signal. When the counter reaches its maximum count of 255, it then automatically recycle back to 0.

When the counter reaches its maximum count of 255, an internal flip-flop is set and the COUNT (overflow) output is activated. This output is HIGH during these 256 clock pulses and then returns to LOW. This output remains HIGH when the counter is reset. This output is used to detect when the counter has overflowed or to create an interrupt.

Applications

The 74ACT163PC is a popular choice for applications in high-performance memory address and data-path design, providing high speed operation and three-state outputs. It can be used in memory address generators, frequency dividers, D/A and A/D converters, modulo-n counters, traffic light control systems, encoder/decoder applications, and shift register operations.

The 74ACT163PC is often used in pulse-width-modulated (PWM) control applications. PWM is a technique used to control the speed of DC motors, control the brightness of LEDs, etc., by varying the width of the pulses. 74ACT163PC is also used for controlling servo motors or other pieces of equipment which require precise timing. In these applications, it is used to create pulse widths which follow a predetermined pattern.

It is also used in automated testing. 74ACT163PC can be used to generate digital patterns that can be used for testing various devices or circuits, such as memory chips. These digital patterns can be used to test the device\'s functionality or to evaluate performance.

The 74ACT163PC is also used in data acquisition systems. In these systems, it is used to sample data and store them in memory. This data can then be analyzed and used in various applications.

Conclusion

The 74ACT163PC is a versatile and reliable presettable binary counter IC. It is frequently used in high-performance memory address and data-path applications requiring speed, three-state outputs and low power consumption. This IC is also used in a wide variety of other applications, including pulse-width-modulated control, automated testing and data acquisition. With its robust design and reliability, the 74ACT163PC is a valuable tool for designers who need fast and reliable results.

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