74ABT2240CSJX

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ABT2240CSJX is an octal buffer and line driver featuring integrated 25Ω series resistors in the outputs. It operates within a supply voltage range of +4.5V to +5.5V and supports free air ambient temperatures from -40°C to +85°C. The device provides two active LOW output enable inputs (OE1, OE2) controlling eight data inputs (D0–D7) and corresponding outputs (O0–O7). Propagation delays are specified with maximum values of 4.9ns for tPLH and 5.3ns for tPHL at VCC = 5V.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrated 25Ω series resistors in the outputs reduce signal ringing and eliminate the need for external components.
• High impedance glitch-free bus loading during the entire power up and power down cycle ensures nondestructive hot insertion capability.
• Guaranteed latchup protection exceeds industry standard limits.

Buffers, Drivers, Receivers, Transceivers Applications

• Driving capacitive inputs of MOS memory drivers
• Address drivers
• Clock drivers
• Bus-oriented transmitters and receivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the component status as obsolete or last-time buy through official manufacturer channels before finalizing designs. Confirm RoHS compliance documentation availability. Ensure the 'X' suffix corresponds to tape and reel packaging requirements. Validate that the SOP-20 package variant matches the specific design footprint constraints.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when driving high-capacitance loads requiring internal termination to minimize reflections. The ABT logic family offers faster switching speeds compared to standard ALS or LSTTL families. Verify that the 5V operating voltage aligns with the system power rails. Consider the dual enable pin configuration for flexible bus management architectures.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the Fairchild Semiconductor ABT logic family, now managed by onsemi following corporate acquisitions. The 74ABT2240 is functionally equivalent to other octal buffers but distinguished by its built-in series output resistors. It serves as a specialized interface solution for high-speed digital buses where signal integrity is critical without adding discrete passive components.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Consult official cross-reference guides for direct replacements. Verify pin compatibility and electrical characteristics match the original specifications. Ensure any substitute maintains the same package type and thermal performance.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the integrated 25Ω resistors?

The 25Ω series resistors are located in the output paths to reduce signal ringing and eliminate the need for external termination resistors.

How does the device handle power-up and power-down cycles?

It provides high impedance glitch-free bus loading during the entire power up and power down cycle, enabling nondestructive hot insertion.