74ACT646SC

Buffers, Drivers, Receivers, Transceivers Overview

The Fairchild Semiconductor 74ACT646SC is an octal registered bus transceiver featuring 3-state outputs. It operates within a voltage range of 4.5V to 5.5V and supports bidirectional data transfer between two ports. The device incorporates D-type flip-flops for internal storage, allowing multiplexed transmission of real-time or stored data. It utilizes a 24-pin SOIC package with an operating temperature range of -40°C to 85°C.

Buffers, Drivers, Receivers, Transceivers Feature Summary

• Provides independent registers for A and B buses to support multiplexed real-time and stored data transfers.
• Features 3-state outputs capable of sourcing and sinking 24 mA for robust bus-oriented applications.
• Includes control circuitry arranged for direct input bus transmission or internal register data output.

Buffers, Drivers, Receivers, Transceivers Applications

• Bus-oriented data transmission systems requiring registered storage
• Bidirectional data routing in digital logic circuits
• Multiplexed data handling in computer memory interfaces

Buffers, Drivers, Receivers, Transceivers Procurement Notes

Verify the specific suffix 'SC' against the manufacturer's current ordering guide to confirm package dimensions and lead-free status. Ensure compatibility with existing PCB footprints for the 24-pin SOIC format. Confirm RoHS compliance requirements match the production batch specifications provided by the supplier.

Buffers, Drivers, Receivers, Transceivers Selection Notes

Select this component when bidirectional octal data transfer with internal latching is required. The ACT series ensures TTL-compatible inputs for interfacing with standard logic families. Consider the 24 mA drive capability for driving multiple loads on shared buses without external buffering.

Buffers, Drivers, Receivers, Transceivers Part Context

This part belongs to the 74ACT logic family, designed for high-speed CMOS applications with TTL-compatible inputs. It serves as a registered transceiver, distinct from non-registered variants like the 74AC646, by providing internal storage registers for each data path direction.

Buffers, Drivers, Receivers, Transceivers Replacement Considerations

The MC74ACT646 from ON Semiconductor is a confirmed public substitute offering identical functional specifications and pinout compatibility.