The UPB74LS164D-T is an 8-bit serial-in, parallel-out shift register manufactured by NEC. It is part of the 74LS series of TTL (Transistor-Transistor Logic) integrated circuits, known for their low-power Schottky technology. This register accepts serial data input and shifts it through eight stages, providing parallel outputs from each stage. The 'D' suffix typically indicates a specific package type (e.g., DIP - Dual Inline Package), and '-T' often signifies tape and reel packaging for automated assembly.

Applications:

• Data Acquisition Systems: Used for serial-to-parallel data conversion in data acquisition systems.
• Display Drivers: Drives LEDs or other display elements in a multiplexed fashion.
• Keyboard Scanners: Implements keyboard scanning logic to detect key presses.
• Digital Delay Lines: Creates digital delay lines by shifting data through the register.
• Sequence Generators: Generates specific digital sequences.

Features:

• 8-Bit Serial-In, Parallel-Out: Converts serial data into parallel format.
• Asynchronous Clear: Provides an asynchronous clear input to reset the register to all zeros.
• Low Power Schottky (LS) Technology: Offers a good balance between speed and power consumption.
• Clock Enable Input: Allows for controlled shifting of data.
• Standard TTL Logic Levels: Compatible with other TTL logic devices.

Benefits:

• Simplified Data Conversion: Converts serial data into a parallel format for easy processing.
• Versatile Applications: Suitable for a wide range of digital logic applications.
• Reduced Power Consumption: LS technology minimizes power consumption.
• Easy Integration: Compatible with standard TTL logic families.
• Reliable Operation: Provides reliable performance in digital circuits.

Technical Specifications:

While the exact details are available in the NEC datasheet, typical parameters for 74LS164 shift registers include:

• Supply Voltage (VCC): Typically 5V.
• Clock Frequency: Specifies the maximum clock frequency for reliable operation.
• Propagation Delay: Indicates the time delay between the input and output signals.
• Input Current: Specifies the input current requirements.
• Operating Temperature Range: Indicates the range of temperatures the register can operate within.