74LVC244ABQ/AUX

Overview

The Nexperia 74LVC244ABQ/AUX is an octal buffer and line driver featuring three-state outputs, housed in a 20-terminal DHVQFN package. It operates within a supply voltage range of 1.2 V to 3.6 V and supports inputs driven by 3.3 V or 5 V devices. The device includes IOFF circuitry for partial power-down applications and Schmitt-trigger action on all inputs. It provides two output enables, each controlling four outputs, and complies with JEDEC standards for various voltage ranges.

Feature Summary

• Features overvoltage tolerant inputs capable of handling up to 5.5 V, allowing direct interfacing with 5 V logic devices.
• Includes IOFF circuitry that disables outputs to prevent damaging backflow current during partial power-down states.
• Incorporates Schmitt-trigger action at all input pins to ensure tolerance against slow input rise and fall times.

Applications

• Translating signals between mixed 3.3 V and 5 V environments
• Partial power-down mode operations requiring backflow current prevention
• Buffering data lines with high-impedance OFF-state control

Procurement Notes

Verify the specific suffix 'AUX' against official Nexperia documentation, as standard datasheets list 'BQ' for the DHVQFN package. Confirm RoHS compliance and lead-free status via the manufacturer's latest ordering information. Ensure the component matches the SOT764-1 outline dimensions for proper PCB footprint integration.

Selection Notes

Select this component when designing systems requiring octal buffering with 3-state capability in low-voltage environments. It is suitable for applications needing interface translation between 1.2 V to 3.6 V logic and 5 V inputs. Consider the DHVQFN package for space-constrained designs requiring thermal enhancement.

Part Context

This part belongs to the 74LVC244A family of octal buffers and line drivers. The 'BQ' designation indicates the DHVQFN20 package variant (SOT764-1). The device is part of Nexperia's CMOS low-power logic series, designed for compatibility with standard TTL levels while operating at reduced voltages.

Replacement Considerations

The 74LVCH244ABQ is a compatible variant within the same family offering bus hold functionality on data inputs. Other packages such as SO20 (AD) or TSSOP20 (APW) provide equivalent electrical performance with different physical footprints.