SN74LS242N

Buffers, Drivers, Receivers, Transceivers Overview

The SN74LS242N is a Low Power Schottky (LS) TTL bus transceiver manufactured by Motorola. It features one functional unit with four bits per direction, providing bidirectional data transfer capabilities. The device utilizes inverted outputs and operates within a standard TTL logic family. It is housed in a CDIP14 ceramic DIP package, designed for through-hole mounting on printed circuit boards. The component supports independent output enable control for each direction, allowing flexible bus management and isolation when required.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Bidirectional data transmission between two buses controlled by a single direction input
• Inverted output configuration compatible with standard TTL logic levels
• Independent output enable control allows individual direction isolation from the bus

Buffers, Drivers, Receivers, Transceivers Applications

• Microprocessor system memory interface buffering
• Bidirectional data bus interconnects in digital systems
• General-purpose I/O expansion circuits requiring isolated data paths

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the manufacturer designation carefully, as this specific part number is historically associated with Motorola. Confirm the package material is ceramic (CDIP) rather than plastic, as variations exist across different production eras and licensees. Ensure the datasheet revision matches the required electrical characteristics for your specific application timing constraints.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an inverted-output bus transceiver is specifically required for signal compatibility. The LS series offers a balance of speed and power consumption suitable for general TTL applications. Consider the ceramic package requirements if environmental robustness or specific thermal properties are necessary compared to standard plastic DIP alternatives.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the 74LS series of integrated circuits, widely used in legacy digital electronics. As a bus transceiver, it facilitates communication between different parts of a system, such as a CPU and peripheral devices. The SN74LS242N represents a specific variant with inverted outputs, distinguishing it from non-inverting counterparts like the SN74LS245.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74LS245JD: Non-inverting equivalent; verify output polarity requirements before substitution.