SN74ALS164ADR

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The SN74ALS164ADR is a 8-bit Parallel-In/Serial-Out Shift Register that belongs to the family of low-power Schottky TTL (LS/ALS) registers. It is mainly used to store and transfer digital data between devices that employ similar binary coding schemes. In this post, we will explore the application field and working principle of the SN74ALS164ADR.

Application Field of SN74ALS164ADR

The SN74ALS164ADR shift register is used in a wide range of applications such as data buffering, data transmission and bus interfacing. It is specifically designed for systems in which parallel data transfers are required. This is mainly because the device’s 8-bit parallel-in/serial-out shift register can accept up to eight bits of data in parallel and can serially output the data at the same rate it is received, thus allowing quick and efficient data transfer. The device can be used for serial-to-parallel conversion and parallel-to-serial conversion. This makes it suitable for applications such as optical character recognition devices, display drivers, bar code readers and security systems. Furthermore, it is also used in digital data storage in devices, such as digital video disks, CD-ROM devices and CD players.

Working Principle of SN74ALS164ADR

The SN74ALS164ADR shift register operates by shifting the data bits through the register, one bit at a time, in the direction determined by the control voltage and the clock pulse. The device contains a serial input (SER), a shift register, and a parallel output of 8 bits.The SER pin is connected to a data source and always receives data. A control voltage, usually known as a ‘clock’, is connected to the timing pin (TIM). The system works by once the clock voltage is activated a bit from the data source is shifted into the register. At the same time, the bit that was previously stored in the register is shifted out and data is transferred in a serial fashion. The register is composed of eight internal D-type flip-flops that are connected in a serial fashion and provide eight parallel outputs. Data can be written on to the register either in serial or parallel format, depending on the application. When the clock voltage is high, the register stores the data that is sent to it in serial or parallel format. On the other hand, when the clock voltage is low, the register reads out the data that was stored and sends it to the device or system that is connected to the output.

Conclusion

Overall, the SN74ALS164ADR shift register is a low-power device primarily used in the fields of buffering, data transmission and bus interfacing. It is composed of eight internal D-type flip-flops that are connected in a serial fashion and provide eight parallel outputs. It can receive both serial and parallel data and can also output serial and parallel data, depending on the application. By understanding the application field and working principle of the SN74ALS164ADR shift register, engineers can easily incorporate this device into their projects and take advantage of its powerful features.

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