DM74ALS244ASJX

Overview

The DM74ALS244ASJX is an octal 3-STATE bus driver manufactured by onsemi, utilizing the Advanced Low Power Schottky (ALS) process. It features eight buffers organized into two groups of four, each with a separate enable input that activates outputs when logic LOW. The device includes power-up and power-down protection to maintain high impedance states, preventing bus glitches. It operates within a supply voltage range of 4.5V to 5.5V and supports propagation delays as low as 3ns. The component is housed in a 20-Lead Small Outline Package (SOP).

Feature Summary

• Octal 3-STATE bus driver architecture with dual independent enable controls for flexible bus interfacing.
• Advanced oxide-isolated ion-implanted Schottky TTL process ensures improved switching performance and reduced power dissipation.
• Integrated circuitry maintains buffer outputs in a high impedance state during power supply ramp-up or ramp-down to eliminate bus glitching.

Applications

• Memory system bus interfaces
• Microprocessor system data routing
• Communication systems signal buffering

Procurement Notes

Verify the specific ordering suffix 'SJX' against current manufacturer documentation to confirm package type and tape-and-reel availability. Confirm RoHS compliance status and lead-free specifications directly with the supplier. Ensure the procurement channel provides valid traceability for this discontinued or legacy component series.

Selection Notes

Select this component for designs requiring functional and pin compatibility with 74LS counterparts while demanding lower power consumption. Verify that the SOP-20 package dimensions align with the target PCB layout constraints. Ensure the application environment remains within the specified operating temperature range for standard grade devices.

Part Context

This part belongs to the DM74ALS244A family of octal 3-STATE bus drivers. The 'SJX' suffix indicates the 20-Lead Small Outline Package (SOP) variant supplied in tape-and-reel format. This family is designed to provide designers with flexibility in implementing bus interfaces across various digital logic applications.

Replacement Considerations

Direct substitutes include SN74ALS244CDBR from Texas Instruments. Verify pinout compatibility and electrical characteristics before implementation.