74HCT540DB,118

Overview

The Nexperia 74HCT540DB,118 is an octal buffer and line driver featuring inverting outputs with three-state capability. It operates within a supply voltage range of 4.5 V to 5.5 V and utilizes the HCT logic family for TTL-compatible input levels. The device incorporates two active-low output enable inputs (OE1 and OE2) that force all outputs into a high-impedance state when asserted HIGH. Inputs include clamp diodes to facilitate interfacing with voltages exceeding VCC using current limiting resistors. The component is housed in a 20-lead SSOP plastic shrink small outline package.

Feature Summary

• Octal configuration providing eight identical inverting buffer circuits within a single integrated circuit.
• Three-state output architecture allowing multiple drivers to share bus lines without electrical contention.
• Dual independent output enable controls permitting flexible management of data flow direction and bus isolation.
• Input protection structures enabling safe connection to external voltage sources higher than the internal supply rail.

Applications

• Bus-oriented memory address and data buffering
• Clock distribution and signal driving
• Control signal routing in digital systems

Procurement Notes

Verify the specific ordering suffix against the manufacturer's latest documentation to confirm package type and availability status. Confirm RoHS compliance requirements match project specifications. Check for any product discontinuation notices or lifecycle changes prior to finalizing design-in decisions.

Selection Notes

Select this component when designing systems requiring isolated octal signal inversion with controlled bus access. Ensure the operating environment remains within the specified temperature range and supply voltage limits. Verify that the load capacitance does not exceed dynamic performance thresholds defined in the datasheet.

Part Context

This part belongs to the 74HCT series of CMOS logic devices manufactured by Nexperia. It shares functional similarities with other octal buffers but is distinguished by its specific HCT input compatibility and SSOP packaging format. The device serves as a standard interface solution between microprocessors and peripheral components.

Replacement Considerations

Consult official Nexperia substitution guides for verified alternatives. Cross-reference pinouts and electrical characteristics carefully before replacing existing designs.