HEF4557BT,652

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Introduction

The HEF4557BT,652 is a logic shift register. It is a high-performance integrated circuit composed of logic, shift register and input/output register. This device can accomplish a wide range of logic functions as basic logic gate and shift register. The device is functionally equivalent to the specific combination of multiple logic gates, both of which are used to achieve the same logical functions. The 6 input/output port shift register provides a circuit is a very convenient and reliable way to store data or application, without the need for the user to constantly refresh or refresh the data or application. It is a commonly used logic shift register and has a wide range of practical applications.

Application Field

HEF4557BT,652 logic shift registers can be used for multiple logic solutions, such as pulse counters, pulse width modulators, data transceivers, and data conversion. But its main application field is shifting. Pulse shift registers, four-phase serial-to-parallel conversion registers, and four-phase serial-to-parallel data latches are all commonly used for logic shift register applications. The main application of shifting is to convert parallel information into serial information, and vice versa.

The conversion from the parallel signal to the serial signal is mainly completed by the shift register. For example, when accessing a serial bus, the information needed by the slave device must first be converted into the serial signal, then accessed and transmitted through the master device. In the process, the logic shift register must be used to complete the signal conversion. Similarly, after the slave device receives the serial data, the logic shift register will also be used to convert it into a parallel signal. There are also certain logic transmission implementations in which the logic shift register is used, such as common-bus data transmission on a bus.

Working Principle

The working principle of the HEF4557BT,652 logic shift register is very simple. This device consists of a target port, clock port and six data ports. The input signal is applied to the target port and the clock port. When a valid signal is applied to the clock port, the logic level on the target port can be shifted from low to high, from high to low, forward or backward. The shift register can also store the data from the six data ports. When the data is transferred to the output port, the logic level on the six data ports is shifted away. The principle of the logic shift register is to transfer the logic level on the target port according to certain rules according to certain rules.

In order to realize the logic shift register, the principles of pulse mode, flip-flop and timing are usually used. By applying a certain voltage to the clock port, the pulse mode will shift the logic level of the target port according to certain rules. The operation of the flip-flop is based on a combination of two bits. The operation of the shift register can be realized by using the clock port to control the flip-flop. In addition, the above three methods can also be applied to the control logic, and can also realize the logic shift effect.

Conclusion

The HEF4557BT,652 is a logic shift register, which is particularly suitable for shifting, pulse counters, pulse width modulators, data transceivers, data conversion and other logic solutions. Its main principle is to use pulse mode, flip-flop, timing and other methods to shift the logic level on the target port. Due to its simplicity, this device is very popular with many manufacturers. It is widely used in various electronic products.

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