74LVC244AD,112

Overview

The Nexperia 74LVC244AD,112 is an octal buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and utilizes the SO20 plastic small outline package (SOT163-1). The device provides two independent output enable inputs, each controlling four outputs. It supports direct interfacing with TTL levels and includes overvoltage tolerant inputs up to 5.5 V. Propagation delay ranges from 1.5 ns to 13.7 ns depending on voltage.

Feature Summary

• Features Schmitt-trigger action at all inputs for tolerance of slower rise and fall times
• Includes IOFF circuitry to prevent damaging backflow current during partial power-down applications
• Provides overvoltage tolerant inputs allowing use as translators in mixed 3.3 V and 5 V environments

Applications

• Mixed voltage translation between 3.3 V and 5 V systems
• Partial power-down mode operation
• Buffering and driving lines with slow input transitions

Procurement Notes

Verify the specific ordering suffix matches the required package type, as the AD suffix designates the SO20 variant. Confirm that the application environment remains within the specified temperature range of -40 °C to +125 °C. Ensure input voltages do not exceed the absolute maximum ratings to prevent permanent damage. Check for compliance with relevant environmental directives such as RoHS if applicable to the final assembly requirements.

Selection Notes

Select this component when an octal buffer with three-state outputs is required for low-voltage CMOS applications. It is suitable for designs needing direct interface with TTL logic levels. Consider the SO20 package constraints regarding board space and thermal dissipation. Verify that the operating voltage falls within the 1.2 V to 3.6 V range for optimal performance and noise immunity.

Part Context

This part belongs to the 74LVC244A family of octal buffers and line drivers. It shares functional characteristics with other variants in the series but differs in packaging and specific electrical parameters. The AD suffix specifically identifies the SO20 plastic small outline package version manufactured by Nexperia USA Inc.

Replacement Considerations

Ensure any substitute maintains the same SO20 package dimensions and pinout configuration. Verify that the replacement device supports the required 1.2 V to 3.6 V supply voltage range and offers comparable propagation delays. Confirm compatibility with mixed voltage environments if overvoltage tolerance is critical.