74LVCH244ABQ,115

Overview

The Nexperia 74LVCH244ABQ,115 is an octal buffer and line driver featuring 3-state outputs. It operates within a supply voltage range of 1.2 V to 3.6 V and supports inputs up to 5.5 V. The device includes IOFF circuitry for partial power-down protection and bus hold functionality on all data inputs. It utilizes the DHVQFN20 package (SOT764-1) with dimensions of 2.5 mm by 4.5 mm. Propagation delay ranges from 2.9 ns to 15.8 ns depending on voltage.

Feature Summary

• Bus hold circuitry maintains input states when signals are inactive
• IOFF circuitry prevents backflow current during partial power-down
• Overvoltage tolerant inputs allow direct interfacing with 5 V devices

Applications

• Mixed 3.3 V and 5 V voltage translation environments
• Partial power-down mode applications requiring output isolation
• Buffering and line driving in low-voltage digital systems

Procurement Notes

Verify the specific suffix ABQ corresponds to the DHVQFN20 package configuration. Confirm that the LVCH designation ensures the inclusion of bus hold features, which distinguishes it from standard LVC variants. Ensure environmental compliance requirements match project specifications before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring bidirectional level shifting between 1.2 V and 5.5 V domains. The integrated bus hold feature simplifies interface design by preventing floating inputs. Verify thermal dissipation requirements against the DHVQFN20 package limitations for high-density PCB layouts.

Part Context

This part belongs to the 74LVC/LVCH logic family, designed for low-voltage CMOS applications. The 'H' variant specifically adds bus hold capabilities to prevent undefined logic states. The ABQ suffix identifies the leadless DHVQFN20 package, offering space-saving benefits compared to traditional SO or TSSOP packages.

Replacement Considerations

The 74LVC244ABQ,115 serves as a functional substitute but lacks the bus hold feature found in the LVCH version.