SN74HC240NE4

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HC240NE4 is an octal buffer and line driver featuring 3-state outputs, housed in a 20-pin PDIP package. It operates within a supply voltage range of 2V to 6V. The device consists of two independent 4-bit buffers with separate output-enable inputs, providing inverted data transfer from A inputs to Y outputs when enabled. Key electrical characteristics include a maximum input current of 1µA and high-current outputs capable of driving up to 15 LSTTL loads. Typical propagation delay is 9ns at 5V, with ±6mA output drive capability.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration organized as two independent 4-bit buffers with separate output-enable controls
• 3-state outputs allow direct connection to bus lines or memory address registers without external drivers
• Wide operating voltage range supports compatibility across various digital logic families
• Low power consumption design minimizes standby current draw during operation

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers for 3-state bus systems
• Clock signal distribution and buffering
• Bus-oriented receivers and transmitters
• Line driving for long-distance signal transmission

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the ordering suffix NE4 corresponds to the PDIP package and lead finish specifications before procurement. Confirm RoHS compliance status and moisture sensitivity level ratings match your assembly process requirements. Check the latest Package Option Addendum for current production status, as availability may change. Ensure the supplier provides valid traceability documentation for military or industrial grade variants if applicable.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring octal buffering with high-impedance states for bus sharing. Consider the 2V to 6V operating range for flexibility in power supply design. Evaluate thermal resistance values for the specific package variant to ensure adequate heat dissipation under load. Verify that the input voltage levels are compatible with the driving logic family to prevent undefined states.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Texas Instruments SNx4HC240 family of octal buffers and line drivers. It shares functional similarities with other HC series devices but offers specific pinout and performance characteristics tailored for bus-oriented applications. The NE4 suffix denotes the PDIP package option, distinguishing it from surface-mount variants like SOIC or TSSOP versions within the same product line.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct substitutes include SN74HC240N (same PDIP package) and SN74HC240DW (SOIC package). For surface-mount replacements, consider SN74HC240DWR or SN74HC240PWR. Verify pin compatibility and electrical specifications before substitution. Military-grade equivalents such as SN54HC240J offer extended temperature ranges but require different handling procedures.