74HCT240DB,112

Overview

The 74HCT240DB,112 is an octal buffer and line driver manufactured by Nexperia USA Inc. It belongs to the 74HCT logic family, providing TTL-compatible input levels with CMOS output characteristics. The device features three-state outputs controlled by two separate output enable inputs. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a specified operating temperature range from -40 °C to +85 °C. The component is housed in a 14-lead SSOP surface-mount package.

Feature Summary

• Octal configuration providing eight independent buffer channels
• Three-state outputs allowing bus-oriented systems without external drivers
• TTL-compatible input thresholds for direct interfacing with TTL logic

Applications

• Bus-oriented architectures requiring signal buffering
• Clock distribution networks
• Memory address decoding circuits

Procurement Notes

Verify current production status as this specific part number may be subject to discontinuation or lifecycle changes. Confirm package availability and lead times through official Nexperia channels or authorized distributors. Ensure compliance with RoHS directives and check for any recent product change notices affecting marking or specifications before finalizing procurement plans.

Selection Notes

Select this component when TTL-level compatibility is required for inputs while maintaining CMOS drive capabilities. The HCT series ensures reliable operation with standard 5V logic systems. Consider the SSOP package constraints regarding thermal dissipation and PCB space. Verify that the three-state control logic aligns with the system's bus management requirements.

Part Context

This component is part of the broader 74HCT240 family of octal buffers. It shares functional similarities with other 74HCT devices but is distinct in its specific pinout and package configuration. The DB suffix indicates the SSOP package variant, differentiating it from SO or TSSOP versions within the same logical family.

Replacement Considerations

Direct replacements include other 74HCT240 variants with compatible packages such as 74HCT240D or 74HCT240PW. Verify pin-to-pin compatibility and electrical specifications before substitution. Alternative manufacturers producing JEDEC-compliant 74HCT240 devices may also serve as valid substitutes if functional equivalence is confirmed.