74AHCT164BQ,115 Integrated Circuits (ICs)

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74AHCT164BQ,115 application field and working principle

The 74AHCT164BQ,115 is a low-power, 8-bit, serial-in/serial-out shift register manufactured by Texas Instruments. It is a member of the 74AHCT series which includes 4, 8, and 16-bit parallel-in/parallel-out registers.The device is an asynchronous clear device, which can be used to transfer data from a serial data stream to a parallel format with minimal power requirements. The shift register has an asynchronous clear input that can be used to quickly reset the device to a known state.

Features

• Low power – 12 mW max. supply current
• High speed – 40 MHz max. operation
• 8-bit serial-in/serial-out shift register
• Low voltage – Supports operation down to 1.8V
• Asynchronous clear input
• 3-state Register Outputs

Application Field

The 74AHCT164BQ,115 shift register is typically used in data transfer, storage and communication applications. It can be used to store or transfer data in 8-bit format, such as ASCII or other communication codes.It can also be used to control multiplexing and demultiplexing operations. One application of this device is in the implementation of matrix keypads, where it can be used to map the pressed keys and transfer the data to the microcontroller.

Working Principle

The 74AHCT164BQ,115 shift register is a serial, 8-bit device. It has two inputs, one data input and one clock input. The data is loaded into the register bit by bit, each bit being shifted in on the rising edge of the clock. The shift register also has a clock enable input, which allows for the loading of more than one 8-bit word at a time. When the clock enable pin is asserted, the clock will be enabled at each rising edge of the clock. The data is shifted in bit by bit until the 8-bit word is complete.

The output pins of the shift register are 3-state enabled, which allows for direct connection to the data bus. The state of these outputs can be controlled by the shift register, allowing a user to select which data is being output.

Conclusion

The 74AHCT164BQ,115 shift register is a low-power, 8-bit serial-in/serial-out shift register designed for data transfer, storage, and communication applications. It has a low-power, high-speed operation and supports operation down to 1.8V. It has an asynchronous clear input to reset the register and 3-state register outputs to enable direct connection to data buses.

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