74ABT2244CSC

Buffers, Drivers, Receivers, Transceivers Overview

The onsemi 74ABT2244CSC is an octal buffer and line driver housed in a 20-lead Small Outline Integrated Circuit (SOIC) package. It operates within a supply voltage range of +4.5V to +5.5V and supports ambient temperatures from -40°C to +85°C. The device features non-inverting logic with two active-low output enable inputs controlling four outputs each. Key electrical parameters include a propagation delay of up to 3.9 ns at 5V, high-level output current of -32 mA, and low-level output current of 15 mA. Internal 25 Ω series resistors are integrated into the outputs.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Integrated 25 Ω series resistors in outputs reduce signal ringing and eliminate the need for external components.
• Provides high-impedance, glitch-free bus loading throughout the entire power-up and power-down cycle.
• Supports nondestructive hot-insertion capability for system reliability.

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 specific ordering suffix 'CSC' corresponds to the M20B 20-Lead SOIC package configuration as defined in the datasheet. Confirm that the component meets the required Pb-Free standards per JEDEC J-STD-020B if applicable to your assembly process. Ensure compatibility with the specified operating temperature range and voltage limits before integration.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when driving high-capacitance loads such as memory or address buses without requiring external termination resistors. The internal 25 Ω resistors simplify PCB layout by mitigating signal integrity issues like ringing. Ensure the design accommodates the dual enable input structure, which allows independent control of the upper and lower output groups.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the ABT logic family, designed for high-speed applications. It serves as an octal buffer and line driver variant within the broader 74ABT2244 product line, which includes other package options such as SOP, SSOP, and TSSOP. The device was originally developed by Fairchild Semiconductor.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Public confirmed substitute part numbers: None identified in source material.

Buffers, Drivers, Receivers, Transceivers FAQ

What is the function of the internal resistors in the 74ABT2244?

The device includes 25 Ω series resistors in the outputs to reduce ringing and remove the requirement for external resistors.

How are the outputs enabled?

The eight outputs are controlled by two active-low output enable inputs (OE1 and OE2), where OE1 controls outputs O0–O3 and OE2 controls outputs O4–O7.