74LVC544AD,112

Overview

The 74LVC544AD,112 is an octal registered inverting transceiver manufactured by NXP Semiconductors. It contains two sets of D-type latches for temporary data storage and supports bidirectional data flow between pins A and B. The device features separate latch enable inputs (LEAB, LEBA) and output enable inputs (OEAB, OEBA) for independent control. It operates with a supply voltage range of 1.2 V to 3.6 V and includes 5 V tolerant inputs/outputs. The component is housed in a 24-lead SO plastic small outline package (SOT137-1).

Feature Summary

• Octal D-type registered transceiver with back-to-back registers for data storage.
• Separate controls allow independent data flow direction and latching for each register set.
• Supports partial power-down applications with high-impedance I/O when VCC is 0V.
• Features 5 V tolerant inputs and outputs for interfacing with 5 V logic systems.

Applications

• Bidirectional data bus buffering and registration.
• Temporary storage of data flow in digital circuits.
• Interfacing between different voltage domains using 5 V tolerant I/O.

Procurement Notes

Verify the specific ordering suffix '112' corresponds to the tape and reel packaging format required for your assembly line. Confirm that the SO24 package variant matches your PCB footprint design. Ensure the operating temperature range meets your system requirements, as this part is specified from -40 °C to +125 °C. Check for any recent product status changes or obsolescence notices on the manufacturer's website before finalizing procurement.

Selection Notes

Select this component when bidirectional data transfer with internal latching is required. The 74LVC544A provides distinct enable signals for input and output directions, allowing flexible control over data flow. Its wide supply voltage range and 5 V tolerance make it suitable for mixed-voltage environments. Consider the 24-pin SOIC package dimensions during layout planning.

Part Context

This component belongs to the 74LVC family of low-voltage CMOS logic devices. It functions as an octal transceiver with registered outputs, distinguishing it from non-registered buffers like the 74LVC541. The 'AD' designation indicates the SO24 package type, while other variants such as 'ADB' (SSOP24) or 'APW' (TSSOP24) offer alternative form factors within the same logical specification.

Replacement Considerations

Direct pin-compatible replacements include the 74LVC544ADB (SSOP24 package) and 74LVC544APW (TSSOP24 package), which share identical electrical characteristics but differ in physical housing dimensions. Verify package compatibility before substitution.