The DM74LS299WM is an 8-bit Universal Shift/Storage Register with 3-State Outputs manufactured by Fairchild/ON Semiconductor. This device is designed for use in high-speed data manipulation and storage applications. It offers a versatile solution for parallel-to-serial, serial-to-parallel, and parallel-to-parallel data transfer.

Applications

• Data Communication Systems: Used as serial-to-parallel and parallel-to-serial converters in data transmission and reception.
• Digital Signal Processing: Employed in digital filters and correlators for temporary data storage.
• Microprocessor Systems: Utilized as I/O port expanders and peripheral controllers.
• Instrumentation: Found in data acquisition systems for data buffering and manipulation.
• Industrial Control Systems: Used in programmable logic controllers (PLCs) for shift register functions.

Features

• 8-Bit Bidirectional Shift Register: Allows data shifting in both left and right directions.
• 3-State Outputs: Enables direct connection to a bus-oriented system without external buffering.
• Parallel Input/Output Capability: Facilitates both serial and parallel data transfer.
• Asynchronous Master Reset: Provides immediate clearing of the register regardless of clock state.
• Shift/Load Control: Determines whether the device shifts data or loads parallel data.
• Low Power Consumption: Uses the LS (Low-power Schottky) technology for reduced power consumption.

Benefits

• Versatile Data Handling: The bidirectional shifting capability offers flexibility in data manipulation.
• Bus Compatibility: The 3-state outputs allow easy integration into bus-structured systems.
• Simplified System Design: The parallel I/O capability reduces the need for additional components.
• High-Speed Operation: The LS technology ensures efficient data transfer rates.
• Easy System Reset: Asynchronous master reset provides quick and reliable register clearing.

Additional Details

The DM74LS299WM operates with a supply voltage of 4.75V to 5.25V. The operating temperature range is typically 0°C to +70°C. It is available in a 20-pin SOIC (Small Outline Integrated Circuit) package. The propagation delay time is typically 15ns. The input loading factor is 0.25 U.L. The device is fully compatible with TTL logic levels. The internal structure includes D-type flip-flops with appropriate gating for shift and load control. The shift inputs are edge-triggered, responding to the rising edge of the clock signal.