74LVC544ADB,112

Overview

The 74LVC544ADB,112 is an octal registered inverting transceiver manufactured by NXP USA Inc. It contains two sets of D-type latches for temporary data storage in either direction. The device operates with a supply voltage range from 1.2 V to 3.6 V and features 5 V tolerant inputs/outputs. It supports partial power-down applications where inputs/outputs become high-impedance when VCC = 0V. The component is housed in an SSOP24 package (SOT340-1) and is specified for operation from -40 °C to +125 °C.

Feature Summary

• Octal D-type registered transceiver with separate latch enable and output enable controls for independent input/output management.
• 5 V tolerant I/Os allowing direct interface with TTL levels and mixed-voltage applications.
• Supports partial power-down modes with high-impedance states during zero supply voltage conditions.

Applications

• Interfacing between 5 V logic systems and lower voltage CMOS devices.
• Temporary storage of data flow in bidirectional communication paths.
• Applications requiring independent control of data direction and output states.

Procurement Notes

Verify the specific ordering suffix 'ADB' corresponds to the SSOP24 package variant SOT340-1 as defined in the official datasheet. Confirm that the required operating temperature range aligns with the -40 °C to +125 °C specification provided for this package type. Ensure design compatibility with the 1.2 V to 3.6 V supply voltage limits before procurement.

Selection Notes

Select this component when bidirectional data transfer with registered storage is required. The 5 V tolerance feature makes it suitable for bridging different voltage domains without additional level shifters. Consider the SSOP24 package constraints regarding board space and thermal dissipation characteristics compared to SOIC or TSSOP alternatives.

Part Context

This part belongs to the 74LVC family of low-voltage CMOS logic devices produced by NXP Semiconductors. The LVC series is designed for high-speed operations while maintaining low power consumption. The 74LVC544A specifically provides octal buffering with registration capabilities, distinguishing it from non-registered transceivers like the 74LVC541.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.