SN74ALS1244AN

Overview

The SN74ALS1244AN is an octal buffer and line driver featuring three-state outputs, manufactured by Texas Instruments. It operates within a supply voltage range of 4.5 V to 5.5 V. The device provides a low-level output current of 16 mA and a high-level output current of -15 mA. Propagation delay times are specified between 3 ns and 28 ns depending on the transition direction. The component is housed in a 20-pin PDIP package and supports operation from 0°C to 70°C.

Feature Summary

• Features pnp inputs that reduce DC loading on driving circuits
• Provides non-inverting octal buffering with three-state outputs for bus-oriented applications
• Designed to improve performance and density in memory address drivers and clock drivers

Applications

• Driving bus lines in digital systems
• Buffering memory address registers
• Clock driver applications requiring high fan-out

Procurement Notes

Verify the specific ordering suffix to confirm the package type and environmental compliance status. Confirm the active lifecycle status as the datasheet indicates this part may be not recommended for new designs. Ensure the required operating temperature range aligns with the commercial grade specifications provided.

Selection Notes

Select this component when designing systems requiring octal buffering with three-state control. The ALS logic family offers a balance of speed and power consumption suitable for general-purpose digital logic. Verify that the input voltage levels match the source logic family to ensure proper signal integrity across the operating temperature range.

Part Context

This device belongs to the SN74ALS series of logic integrated circuits. It serves as the non-inverting counterpart to the SN74ALS1240. The SN74ALS1244A variant is specifically characterized for commercial temperature ranges, distinguishing it from the military-grade SN54ALS1244A which supports extended thermal conditions.

Replacement Considerations

SN74ALS1240 (Inverting Octal Buffer)

FAQ

What is the maximum low-level output current?

The maximum low-level output current is 16 mA.

Does this device support inverting outputs?

No, the SN74ALS1244A provides non-inverting outputs. The SN74ALS1240 is the corresponding inverting version.