SN74ALS244CNSLE

Overview

The SN74ALS244CNSLE is an octal buffer and line driver with 3-state outputs manufactured by Texas Instruments. It belongs to the ALS logic series, designed for non-inverting signal transmission. The device operates within a supply voltage range of 4.5 V to 5.5 V. It features two independent output enable inputs (1OE and 2OE) controlling four-bit groups. The component utilizes PNP inputs to reduce DC loading on driving circuits. It is characterized for operation from 0°C to 70°C.

Feature Summary

• Octal buffering architecture with independent control over two four-bit channels
• Three-state outputs capable of driving bus lines or memory address registers
• PNP input structure providing reduced DC loading compared to standard TTL

Applications

• Memory address drivers in computer systems
• Clock distribution buffers
• Bus-oriented receivers and transmitters

Procurement Notes

Verify the specific ordering suffix 'NSLE' against current Texas Instruments documentation. Standard catalog listings typically utilize suffixes such as 'N', 'DW', or 'NSR'. Confirm package type and manufacturing status directly with the manufacturer or authorized distributors to ensure availability and correct part identification.

Selection Notes

Select this component when designing systems requiring high-density octal buffering with low DC loading characteristics. The ALS series offers a balance between speed and power consumption suitable for general-purpose digital logic applications operating at standard 5V logic levels.

Part Context

This device is part of the broader SN54/74ALS244 family of octal buffers. It shares functional similarities with the SN74LS244 but provides improved switching speeds and lower power dissipation due to its Advanced Low-power Schottky technology. It serves as a foundational building block for parallel data transmission interfaces.

Replacement Considerations

SN74ALS244CN

FAQ

What is the function of the OE inputs?

The 1OE and 2OE inputs are active-low output enables that independently control the state of the first and second groups of four outputs, respectively.

How does the PNP input structure benefit the circuit?

The PNP inputs significantly reduce the DC loading current drawn from the preceding driving stage compared to standard NPN-based TTL inputs.