The GD74LS244 is an octal buffer/line driver with 3-state outputs manufactured by LG. This device belongs to the 74LS series, characterized by Low-power Schottky TTL technology. It is designed to act as a buffer, providing increased drive capability for digital signals, and as a line driver for transmitting signals over longer distances. The 3-state outputs enable the device to be effectively disconnected from the bus when not in use, preventing signal contention.

Applications

• Memory Address Buffering: Used in memory systems to buffer address lines, increasing drive capability and reducing loading on the address bus.
• Data Bus Isolation: Employed to isolate sections of a data bus, preventing signal contention and improving system reliability.
• Line Driving: Functions as a line driver to transmit digital signals over longer distances with minimal signal degradation.
• I/O Port Expansion: Used in expanding the I/O capabilities of microcontrollers and microprocessors.
• Bidirectional Bus Transceivers: Implemented in bidirectional bus transceivers to control the direction of data flow.

Features

• Octal Buffer/Line Driver: Contains eight independent buffers/line drivers in a single package.
• 3-State Outputs: Allows the outputs to be in a high (logic 1), low (logic 0), or high-impedance (disconnected) state.
• Low-Power Schottky TTL: Offers low power consumption with improved speed compared to standard TTL.
• High Output Drive Capability: Can drive multiple loads, enabling efficient signal distribution.
• Enable Inputs: Controlled by one or two enable inputs that determine whether the outputs are active or in the high-impedance state.

Benefits

• Increased Drive Capability: Enhances the ability to drive heavily loaded buses and lines.
• Reduced Signal Loading: Minimizes the load on the driving device, improving signal integrity.
• Bus Contention Prevention: Prevents signal contention by allowing devices to be disconnected from the bus when not in use.
• Simplified System Design: Simplifies the design of complex digital systems by providing a flexible buffering solution.
• Cost-Effective Solution: Offers a cost-efficient solution for buffering and driving digital signals.

Technical Details

The GD74LS244 operates from a supply voltage of 4.75V to 5.25V. The output current drive capability is typically specified and indicates the maximum current that can be sourced or sunk by the output. The enable inputs control the state of the outputs; when enabled, the outputs follow the inputs, and when disabled, the outputs are in the high-impedance state. It is typically packaged in a DIP (Dual In-line Package) for easy breadboarding and prototyping.