74HC540D,653

Overview

The Nexperia 74HC540D,653 is an octal buffer and line driver featuring inverting outputs with three-state capability. It operates within a supply voltage range of 2.0 V to 6.0 V and utilizes a 20-lead SO plastic small outline package (SOT163-1). The device incorporates two active-low output enable inputs (OE1 and OE2) to control the high-impedance OFF-state. Input pins include clamp diodes for interfacing with voltages exceeding VCC. It supports ambient temperatures from -40 °C to +125 °C.

Feature Summary

• Features dual active-low output enables for flexible bus management
• Provides inverting logic functionality with three-state outputs
• Includes input clamp diodes to support voltage levels above VCC

Applications

• Bus-oriented communications systems
• Clock drivers
• Memory address decoding

Procurement Notes

Verify that the specific suffix '653' corresponds to the standard tape-and-reel packaging configuration as defined by Nexperia. Confirm the package type matches the SOT163-1 specification for the SO20 variant. Ensure compliance with RoHS3 directives and check for any recent Product Change Notifications regarding marking or assembly updates before finalizing procurement orders.

Selection Notes

Select this component when an octal inverting buffer with three-state outputs is required. The wide supply voltage range allows compatibility with various logic families. Verify that the operating temperature range meets the environmental requirements of the target application. Consider the package dimensions if board space is constrained.

Part Context

This part belongs to the 74HC series of CMOS logic devices manufactured by Nexperia. It is functionally compatible with other industry-standard octal buffers but offers specific performance characteristics defined by Nexperia's manufacturing processes. The D,653 designation identifies the specific package and reel configuration within the broader 74HC540 product family.

Replacement Considerations

Direct replacements must match the 74HC540 logical function and 20-pin SOIC package. Verify pinout compatibility and electrical specifications such as propagation delay and output drive current. Check for equivalent three-state behavior and supply voltage ranges.