SN74ALS1244ADW

Overview

The SN74ALS1244ADW is an octal buffer and line driver from the Texas Instruments ALS logic family, housed in a 20-pin SOIC (DW) package. It operates on a supply voltage of 4.5 V to 5.5 V with a typical operating voltage of 5 V. The device features non-inverting outputs with 3-state capability controlled by two separate output enable inputs (1OE and 2OE). Propagation delays range from 3 ns to 28 ns depending on the transition direction and control signal state.

Feature Summary

• Octal buffers and drivers designed for bus-oriented receivers and transmitters
• P-N-P inputs reduce DC loading on driving circuits
• 3-state outputs allow connection to bus lines or memory address registers

Applications

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

Procurement Notes

Verify the current marketing status as the SN74ALS1244ADW is listed as NRND (Not Recommended for New Designs). Confirm that existing production support aligns with long-term project requirements before finalizing procurement plans.

Selection Notes

Select this component when low-power Schottky performance is required for high-density bus applications. Ensure the design accommodates the specific propagation delay variations between input-to-output and output-enable transitions defined in the electrical characteristics.

Part Context

This part belongs to the SN74ALS1244A series, which serves as the non-inverting counterpart to the SN74ALS1240A inverting buffer. Both devices utilize P-N-P input structures to minimize DC loading while providing 3-state output control for efficient bus management.

Replacement Considerations

SN74ALS1244ADWR

FAQ

What is the function of the 1OE and 2OE pins?

These are independent output enable inputs that control the 3-state functionality of the four outputs associated with each pin.

Does the SN74ALS1244ADW invert the input signals?

No, it provides non-inverting outputs, meaning the output logic level matches the input logic level when enabled.