SN74LS243DR

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS243DR is an octal bus transceiver manufactured by Texas Instruments, belonging to the 74LS logic family. It features eight bidirectional data paths with three-state outputs and includes separate direction and output-enable control inputs for each group of four bits. Designed for low-voltage applications, it operates within a supply voltage range of 4.75 V to 5.25 V. The device utilizes a 20-pin Small Outline (SOIC) surface-mount package, providing efficient signal routing in digital systems requiring isolated bidirectional communication channels.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides eight bidirectional data paths for flexible signal routing between buses
• Features independent direction and output-enable controls for each half of the device
• Delivers high-impedance three-state outputs to prevent bus contention during inactive states

Buffers, Drivers, Receivers, Transceivers Applications

• Bidirectional data bus buffering in microprocessor-based systems
• Isolating memory address and data lines in computer architectures
• Signal translation between different logic families or voltage domains

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'DR' confirms the SOIC-20 surface mount package variant rather than through-hole options. Confirm the manufacturer designation as Texas Instruments to ensure compatibility with original system designs. Check for RoHS compliance status if required by environmental regulations. Validate that the component meets the specified 74LS logic family electrical characteristics for your application environment.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional data transfer is required with independent control over two groups of four bits. The LS logic family offers standard speed suitable for general-purpose digital interfaces. Ensure the design accommodates the 20-pin SOIC footprint and thermal requirements. Consider power consumption limits associated with the LS series compared to newer CMOS alternatives if efficiency is critical.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SN74LS24x series of octal bus transceivers from Texas Instruments. It shares functional similarities with the SN74LS244 but differs in having dual control inputs for greater flexibility. The device is part of the broader 74xx logic ecosystem, widely used in legacy and industrial digital circuit designs requiring reliable bidirectional data handling.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Compatible substitutes include the SN74LS244N for unidirectional applications or other 74LS24x variants with matching pinouts. Verify electrical parameters such as propagation delay and drive current when cross-referencing with equivalent parts from other manufacturers.