The SN74AHCT594DG4 is a 8-bit shift register and storage register with 3-state outputs. It is a popular integrated circuit (IC) component widely used in various digital applications. Here is an overview of this IC and its key features:
1. Functionality: The SN74AHCT594DG4 is designed to perform serial-to-parallel and parallel-to-serial data conversion tasks. It consists of an 8-bit shift register, an 8-bit storage register, and separate control logic for driving the outputs.
2. Serial-In, Parallel-Out: The shift register has a serial data input (SER) pin, where data can be input in a serially shifted manner. At every clock cycle, the input data shifts right, and the previously stored data shifts left, with the MSB (most significant bit) being shifted out from the SDO (Serial Data Out) pin.
3. Parallel-In, Serial-Out: The storage register allows parallel loading of data into the shift register. The parallel data inputs (A-H) are latched into the storage register when the parallel load (PL) control input is high. The data from the storage register is then shifted out serially.
4. 3-State Outputs: The SN74AHCT594DG4 features 3-state outputs (QA-QH), allowing for a high-impedance state when the output enable (OE) control input is low
