74ABT646APW,118

Buffers, Drivers, Receivers, Transceivers Overview

The NXP 74ABT646APW,118 is an octal bus transceiver and register featuring 3-state outputs. It integrates D-type flip-flops with control circuitry for multiplexed data transmission from input buses or internal registers. The device supports independent A and B bus registers, allowing real-time transfer or stored data selection via SAB and SBA pins. Direction is controlled by the DIR pin, while OE manages output enablement. It operates within a supply voltage range of 4.5 V to 5.5 V and supports ambient temperatures from -40 °C to +85 °C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Combines 74ABT245 and 74ABT373A type functions in one device
• Independent registers for A and B buses
• Multiplexed real-time and stored data
• Live insertion and extraction permitted

Buffers, Drivers, Receivers, Transceivers Applications

• Bus management systems requiring simultaneous storage and transfer
• High-speed data communication interfaces
• Systems supporting live insertion and extraction protocols

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific ordering suffix

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when an application requires both high-speed bidirectional bus buffering and parallel data latching capabilities. The dual-register architecture allows for complex bus management strategies, such as holding data on one bus while transferring data on another. Ensure the system design accommodates the required clocking signals (CPAB/CPBA) and direction control logic for proper multiplexed operation.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ABT series of high-performance BiCMOS logic devices. It serves as a combined solution for bus transceivers and registers, replacing the need for separate components like the 74ABT245 and 74ABT373A. The TSSOP24 package provides a compact form factor suitable for space-constrained printed circuit board designs.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

Direct functional equivalents include the 74ABT245 for pure transceiver needs and the 74ABT373A for latching needs. For drop-in replacements combining these functions, verify compatibility with other 74ABT646 variants such as the 74ABT646AD or 74ABT646ADB based on package requirements.