74LVC2244ABQ,115

Overview

The Nexperia 74LVC2244ABQ,115 is an octal buffer and line driver featuring 3-state outputs with integrated 30 Ω series termination resistors. It operates on a supply voltage range of 1.2 V to 3.6 V and supports inputs driven by 3.3 V or 5 V devices, enabling translation in mixed-voltage environments. The device includes Schmitt-trigger action for slow input transitions and IOFF circuitry for partial power-down protection against backflow current. Packaged in a DHVQFN20 (SOT764-1) format measuring 2.5 x 4.5 mm, it functions as two independent 4-bit buffers or one 8-bit buffer.

Feature Summary

• Integrated 30 Ω series termination resistors for signal integrity
• IOFF circuitry prevents damaging backflow during partial power-down
• Overvoltage tolerant inputs up to 5.5 V for 5 V interfacing
• Schmitt-trigger inputs ensure tolerance for slow rise and fall times

Applications

• Mixed 3.3 V and 5 V logic level translation
• Partial power-down mode applications requiring backflow prevention
• Line driving with controlled impedance termination

Procurement Notes

Verify the specific suffix '115' corresponds to the DHVQFN20 package configuration when sourcing. Confirm that the application environment remains within the specified -40 °C to +125 °C temperature range. Ensure design safeguards account for the absolute maximum ratings regarding supply voltage and output current to prevent permanent device damage.

Selection Notes

Select this component when designing systems requiring octal buffering with built-in series termination to minimize reflections. It is suitable for interfaces where inputs must tolerate voltages exceeding the device's VCC supply. Consider the DHVQFN20 package dimensions if space-constrained PCB layouts are required compared to standard SO or TSSOP packages.

Part Context

This part belongs to the 74LVC2244A family of octal buffers. The ABQ variant specifically denotes the DHVQFN20 leadless package option. It shares functional characteristics with other LVC series buffers but distinguishes itself through the inclusion of internal termination resistors and robust 5 V tolerant input capabilities.

Replacement Considerations

The 74LVC2244AD (SO20) and 74LVC2244APW (TSSOP20) offer identical electrical functionality but utilize different physical packages.