74ABT646ADB,112

Buffers, Drivers, Receivers, Transceivers Overview

The 74ABT646ADB,112 is an octal bus transceiver and register manufactured by NXP USA Inc. It utilizes high-performance BiCMOS technology to provide low power dissipation alongside high speed and drive capability. The device integrates bus transceiver circuits with 3-state outputs and D-type flip-flops for multiplexed data transmission. It supports a supply voltage range of 4.5 V to 5.5 V and operates within an ambient temperature range of -40 °C to +85 °C. The component is housed in a 24-lead SSOP plastic shrink small outline package (SOT340-1).

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Combines 74ABT245 and 74ABT373A type functions in one device.
• Features independent registers for A and B buses allowing multiplexed real-time and stored data.
• Supports live insertion and extraction operations.
• Includes power-up 3-state functionality and power-up reset.

Buffers, Drivers, Receivers, Transceivers Applications

• Multiplexed transmission of data directly from input bus or internal registers.
• Storage and transfer of data between Bus A and Bus B.
• Real-time bus management functions including isolation and hold storage.

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix '112' corresponds to the SSOP24 package variant SOT340-1 as defined in the official NXP datasheet. Confirm that the manufacturer designation matches NXP USA Inc. or NXP Semiconductors. Ensure the component status is checked against current production schedules, as availability may vary. Cross-reference the RoHS compliance details provided in the documentation before finalizing procurement.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an application requires both bus transceiving and latching capabilities within a single integrated circuit. The device is suitable for designs needing independent control over data flow direction and storage states for two separate 8-bit buses. Consider the BiCMOS technology benefits regarding drive strength and switching speeds compared to standard CMOS alternatives. Verify that the required operating voltage and temperature ranges align with the system specifications.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ABT logic family, which offers high-speed performance with reduced power consumption. The 74ABT646A series specifically addresses applications requiring complex bus management. The 'ADB' suffix indicates the SSOP24 package option, while other variants like 'AD' (SO24) and 'APW' (TSSOP24) exist within the same functional family. These components are widely used in digital systems requiring efficient data routing and temporary storage.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct replacements include the 74ABT646AD (SO24 package) and 74ABT646APW (TSSOP24 package) from NXP, which share identical electrical characteristics but differ in physical footprint. Other manufacturers producing equivalent octal bus transceivers with registers should be evaluated based on pin compatibility and parameter matching.