SN74ALS244C-1DB

Overview

The SN74ALS244C-1DB is an octal buffer and line driver featuring three-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. The device provides non-inverting signal transmission with symmetrical active-low output-enable inputs. Designed for bus-oriented applications, it utilizes PNP inputs to reduce DC loading. The -1 suffix indicates a recommended maximum low-level output current (IOL) of 48 mA, provided the supply voltage remains between 4.75 V and 5.25 V. Operating temperature range is specified from 0°C to 70°C.

Feature Summary

• Octal buffering and line driving capabilities with three-state outputs for bus line interfacing
• PNP input structure designed to minimize DC loading on preceding circuit stages
• Symmetrical active-low output-enable inputs allowing flexible control configurations

Applications

• Driving memory address registers in bus-oriented systems
• Clock signal distribution and buffering
• Bus receiver and transmitter interface circuits

Procurement Notes

Verify that the specific ordering suffix corresponds to the desired package type and manufacturing status. Confirm that the -1 designation aligns with system requirements for the 48 mA low-level output current specification. Ensure supply voltage constraints are met to maintain this performance level. Check for RoHS compliance and lead finish details relevant to assembly processes.

Selection Notes

Select this component when high-density octal buffering with reduced input loading is required. The ALS technology offers a balance of speed and power consumption suitable for standard 5 V logic systems. Consider the -1 version specifically if higher sink current capability is necessary for driving heavy bus loads or multiple downstream inputs.

Part Context

This part is part of the SN74ALS244 family of octal buffers and line drivers. It shares functional similarities with the SN74ALS244C but differs in output drive specifications due to the -1 suffix. Related variants include the SN74AS244A for higher speed applications and the SN74LS240/241 for lower cost options. The device is distinct from the SN54 series which supports military temperature ranges.

Replacement Considerations

Direct substitutes include SN74ALS244C-1DWR and SN74ALS244C-1N. Verify pinout compatibility and electrical characteristics before substitution.