SN74AS240AN

Buffers, Drivers, Receivers, Transceivers Overview

The SN74AS240AN is an octal buffer and line driver manufactured by Texas Instruments, belonging to the AS logic series. It features eight inverting outputs with three-state capability, housed in a 20-pin PDIP package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical specifications include a high-level output current of -15 mA and a low-level output current of 64 mA. Propagation delay is specified at 6.5 ns, with a maximum operating temperature of +70°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides eight inverting buffer channels with independent three-state control for bus-oriented memory and clock drivers.
• Delivers high drive capability suitable for driving heavy capacitive or resistive loads on data buses.
• Utilizes bipolar technology to achieve faster switching speeds compared to standard TTL equivalents.

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address decoding systems requiring high-speed signal buffering.
• Clock distribution networks for synchronous digital circuits.
• Bus-oriented architectures utilizing bidirectional data transfer protocols.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific manufacturer source and lot traceability before integration into production designs. Confirm that the PDIP-20 package variant matches the target PCB footprint requirements. Ensure compliance with relevant environmental directives applicable to the deployment region. Validate that the operating temperature range aligns with the final system's thermal environment constraints.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when high-speed performance is critical for octal bus applications. The bipolar construction offers superior drive strength over CMOS alternatives like the HC series. Consider the through-hole packaging requirement for prototyping or legacy board designs. Evaluate power dissipation limits given the higher static current associated with the AS logic family.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments SN74AS240A family of octal buffers. It serves as a high-speed alternative to standard 74S240 devices. The AS series represents an advanced Schottky technology designed for demanding digital logic applications requiring reduced propagation delays and improved noise immunity.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74AS240ADW (SOIC-20 package equivalent). SN74AS240ANSR (Tape and Reel packaging variant).