SN74ALS244C-1DBR

Overview

The SN74ALS244C-1DBR is an octal buffer and line driver with 3-state outputs manufactured by Texas Instruments. It belongs to the ALS logic series and operates within a supply voltage range of 4.5 V to 5.5 V, typically at 5 V. The device features two output enable inputs (1OE and 2OE) controlling eight non-inverting buffers. The -1 suffix indicates a recommended maximum low-level output current (IOL) of 48 mA when VCC is between 4.75 V and 5.25 V. It is housed in a 20-pin Small Outline (DW) package and is characterized for operation from 0°C to 70°C.

Feature Summary

• Octal buffering architecture designed for high-density memory address drivers and bus-oriented applications
• PNP input structure reduces DC loading on driving circuits
• Symmetrical active-low output-enable inputs facilitate bus-oriented receiver and transmitter designs

Applications

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

Procurement Notes

Verify that the specific ordering suffix corresponds to the required package type and tape-and-reel specifications. Confirm the -1 designation aligns with the intended load requirements, as it specifies a higher IOL limit under strict voltage conditions. Ensure the component status matches the production lifecycle stage for long-term availability planning.

Selection Notes

Select this variant when a standard ALS octal buffer requires enhanced low-level drive capability within a narrow 5V operating window. The DW package offers surface-mount integration. Consider the SN74ALS244C without the -1 suffix if the 48 mA IOL specification is not necessary or if broader voltage tolerance is preferred.

Part Context

This component is part of the SN54/74ALS244C family of octal buffers and line drivers. It shares functional similarities with the SN74ALS240A, SN74ALS241C, SN74AS240A, and SN74AS241A, providing options for inverting outputs and different enable configurations. The -1 version is distinct from the standard version primarily due to its specific IOL rating.

Replacement Considerations

SN74ALS244CDWR