SN74ALS244C-1NS

Overview

The SN74ALS244C-1N is an octal buffer and line driver with three-state outputs manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V and supports a low-level output current of up to 48 mA for the -1 version. The device features non-inverting logic, PNP inputs to reduce DC loading, and symmetrical active-low output-enable inputs. It is housed in a 20-pin plastic dual in-line package (PDIP) and is characterized for operation over a temperature range of 0°C to 70°C.

Feature Summary

• Octal buffers and line drivers designed for bus-oriented receivers and transmitters
• Three-state outputs capable of driving bus lines or memory address registers
• PNP inputs utilized to reduce DC loading on driving circuits

Applications

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

Procurement Notes

Verify that the specific ordering suffix '-1' is required, as it denotes a recommended maximum IOL of 48 mA under specific voltage conditions. Confirm the 'N' suffix corresponds to the standard plastic DIP package. Ensure the application environment remains within the specified 0°C to 70°C operating temperature range for this catalog variant.

Selection Notes

Select this component when high drive capability is needed for bus systems. The -1 designation provides increased low-level sink current compared to standard versions. Verify compatibility with existing logic families and ensure the PCB layout accommodates the 20-pin PDIP footprint. Consider thermal management if operating near the upper temperature limits.

Part Context

This part belongs to the SN74ALS series of advanced low-power Schottky logic devices. It shares functional similarities with the SN74ALS240A and SN74ALS241C but offers non-inverting outputs. The device is part of a broader family including military-grade SN54 variants and faster AS series counterparts, providing design flexibility for different performance and environmental requirements.

Replacement Considerations

SN74ALS244CN is available as a direct substitute without the -1 current rating modification.