SN74HCT240NS

Buffers, Drivers, Receivers, Transceivers Overview

The SN74HCT240NS is an octal buffer and line driver with 3-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5V to 5.5V. The device features two separate output-enable inputs controlling two 4-bit buffers. It provides high-current outputs capable of driving up to 15 LSTTL loads, with ±6mA drive at 5V. Typical propagation delay is 12 ns. The component utilizes a 20-pin SOP (NS) package.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Octal configuration organized as two independent 4-bit buffers with separate output-enable controls
• TTL-voltage compatible inputs allowing direct interfacing with TTL logic systems
• High-current outputs designed to drive bus lines or memory address registers
• Low power consumption characteristics suitable for density-critical applications

Buffers, Drivers, Receivers, Transceivers Applications

• Memory address drivers
• Clock drivers
• Bus-oriented receivers and transmitters

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix 'NS' corresponds to the 20-pin Small Outline Package (SOP). Confirm RoHS compliance status and lead finish details in the latest Package Option Addendum. Ensure the procurement channel sources active production parts rather than obsolete variants like the DW package. Validate that the supplier provides original manufacturer documentation matching the SN74HCT240 datasheet specifications.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when designing systems requiring octal buffering with inverted logic functionality. The HCT series ensures compatibility with standard TTL input levels while maintaining CMOS noise immunity. Verify that the required operating temperature range aligns with the commercial grade limits (-40°C to +85°C). Consider the 3-state output capability for bus sharing applications where multiple drivers connect to common lines.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the SNx4HCT240 family of octal buffers and line drivers. It is distinct from the SN54HCT240 military version which supports extended temperature ranges. The NS suffix specifically denotes the plastic small outline package variant, differentiating it from PDIP, SOIC, or TSSOP options within the same logical family.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

SN74HCT240N (PDIP-20)

Buffers, Drivers, Receivers, Transceivers FAQ

What is the logic polarity of the SN74HCT240NS?

The device passes inverted data from the A inputs to the Y outputs when enabled.

How are the outputs controlled?

The device has two separate output-enable (OE) inputs. When OE is low, the respective buffer is active; when OE is high, the outputs enter a high-impedance state.