SN74ALS240A-1DW

Overview

The SN74ALS240A-1DW is an octal buffer and line driver from the Texas Instruments SN74ALS series. It features eight inverting outputs with three-state capability, housed in a 20-pin SOIC package. The device operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 9 ns at nominal supply, a low-level output current of 48 mA, and a high-level output current of -24 mA. The maximum static supply current is 25 mA, and it supports a junction temperature range from 0°C to +70°C.

Feature Summary

• Provides eight inverting buffer channels with independent three-state control for bus-oriented communication.
• Delivers high drive capability suitable for driving heavy capacitive or resistive loads on data buses.
• Utilizes advanced low-power Schottky (ALS) technology to reduce power consumption while maintaining fast switching speeds.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented architectures

Procurement Notes

Verify the specific suffix '1' against the official datasheet to confirm pinout configuration, as standard variants may differ. Ensure the SOIC-20 package matches the target PCB footprint. Confirm RoHS compliance status through the manufacturer's latest documentation before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring high-speed octal buffering with low power dissipation. Compare propagation delay and output drive strength against other ALS family members if tighter timing constraints exist. Verify that the operating temperature range meets the environmental requirements of the intended application environment.

Part Context

This part belongs to the SN74ALS logic family, known for balancing speed and power efficiency. It serves as a digital buffer within the broader 74-series logic ecosystem, providing signal integrity improvements for microprocessor and memory interfaces. The device complements other ALS components like latches and gates in complex digital designs.

Replacement Considerations

SN74ALS240ADW is a potential substitute; verify pin compatibility and electrical characteristics against the original specification sheet.