74LVC244ABZX

Overview

The Nexperia 74LVC244ABZX is an octal buffer and line driver featuring three-state outputs, housed in a DHXQFN20 package (SOT8020-1). It operates on a supply voltage range of 1.2 V to 3.6 V with inputs tolerant up to 5.5 V. The device provides two output enables controlling four outputs each. Static characteristics include a maximum input leakage current of ±20 μA at -40 °C to +125 °C and a typical power dissipation capacitance of 12.5 pF at 3.0 V to 3.6 V. Dynamic performance shows a maximum propagation delay of 7.5 ns at 3.0 V to 3.6 V.

Feature Summary

• Features Schmitt-trigger action at all inputs for tolerance of slower rise and fall times.
• Includes IOFF circuitry to disable outputs and prevent damaging backflow current during partial power-down.
• Provides overvoltage tolerant inputs allowing direct interface with 5 V devices while operating at lower voltages.

Applications

• Mixed 3.3 V and 5 V environments
• Partial power-down applications

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the DHXQFN20 package type and lead-free status. Confirm that the requested part number matches the exact temperature range and electrical specifications required for the design. Cross-reference the latest datasheet revision to ensure compliance with current JEDEC standards and ESD protection ratings before finalizing procurement.

Selection Notes

Select this component when an octal buffer with three-state outputs is required in a space-constrained layout. The DHXQFN20 package offers a compact footprint suitable for high-density PCB designs. Ensure the application utilizes the 1.2 V to 3.6 V supply range and requires overvoltage tolerant inputs for interfacing with higher voltage logic levels without external level shifting components.

Part Context

This device belongs to the 74LVC244A family of octal buffers and line drivers. It shares functional similarities with other variants such as the SO20 and TSSOP20 packages but differs in physical dimensions and thermal characteristics. The ABZX suffix specifically denotes the DHXQFN20 leadless package variant within the broader 74LVC logic series.

Replacement Considerations

Public confirmed substitute part numbers: 74LVCH244ABZ