74ABT2240CSCX

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ABT2240CSCX is an inverting octal buffer and line driver designed for driving capacitive inputs of MOS memory drivers, address drivers, clock drivers, and bus-oriented transmitters or receivers. It features integrated 25Ω series resistors in the outputs to reduce ringing and eliminate external components. The device operates within a supply voltage range of +4.5V to +5.5V. Propagation delays are typically 4.9ns (tPLH) and 5.3ns (tPHL). Output drive capabilities include a minimum high-level output voltage of 2.0V at -32mA and a maximum low-level output voltage of 0.8V at 15mA.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrated 25Ω series resistors in outputs reduce signal ringing and remove the need for external resistors
• Guaranteed latchup protection ensures robust operation under electrical stress
• High impedance glitch-free bus loading maintained throughout the entire power-up and power-down cycle
• Nondestructive hot insertion capability allows safe connection while the system is powered

Buffers, Drivers, Receivers, Transceivers Applications

• Driving capacitive inputs of MOS memory drivers
• Address drivers in digital systems
• Clock drivers for timing signals
• Bus-oriented transmitters and receivers

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific package variant, as the base part number covers multiple packages including SOIC-20, SOP-20, SSOP-20, and TSSOP-20. Confirm RoHS compliance status through official documentation. Ensure the ordering code suffix matches the required physical footprint. Check for availability of tape and reel options if indicated by an 'X' suffix.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when driving high-capacitance loads such as MOS memory interfaces without requiring external series termination resistors. The ABT logic family provides faster switching speeds compared to standard ALS or LVC families. Verify that the operating voltage aligns with the 4.5V to 5.5V requirement. Consider the 25Ω internal resistance for impedance matching applications where external components are undesirable.

Buffers, Drivers, Receivers, Transceivers Part Context

This device belongs to the Fairchild/ON Semiconductor ABT logic family, which combines BiCMOS technology for high speed with CMOS input compatibility. The 74ABT2240 is part of a broader series of octal buffers and line drivers. While originally manufactured by Fairchild Semiconductor, the product line is now managed by ON Semiconductor following corporate acquisitions.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct pin-compatible substitutes may include other octal buffers from the same logic family, such as the 74ABT240 (non-inverting version). Cross-manufacturer equivalents like the SN74ABT2240 from Texas Instruments offer similar specifications but require verification of electrical characteristics and package dimensions.