CD74ACT646M

Overview

The CD74ACT646M is an octal bus transceiver and register from the Texas Instruments ACT logic series. It features a single circuit with eight channels, providing non-inverting data transfer. The device utilizes a 24-pin SOIC package for surface mount installation. It operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a propagation delay of 12.5 ns at 5 V with 50 pF load, and output drive currents of ±24 mA. The component supports TTL input levels and CMOS output levels, ensuring compatibility across mixed-logic systems.

Feature Summary

• Octal registered bus transceiver architecture enabling simultaneous data storage and transfer
• Three-state outputs allowing direct connection to system buses without external drivers
• ACT technology provides high-speed performance with low power consumption characteristics

Applications

• High-performance microprocessor-based systems requiring buffered memory interfaces
• Complex digital control systems utilizing bidirectional data pathways
• Industrial automation equipment needing reliable signal isolation and buffering

Procurement Notes

Verify the specific suffix designation when ordering, as it determines the packaging format such as tape-and-reel quantities. Confirm RoHS compliance status and moisture sensitivity level requirements for your assembly process. Ensure the selected variant matches the required operating temperature range and pinout configuration for your PCB layout design.

Selection Notes

Select this component when an octal width is required for bus applications rather than narrower bit-width alternatives. The ACT series offers a balance of speed and power suitable for general-purpose logic interfacing. Consider the 24-pin SOIC footprint constraints and verify that the ±24 mA drive capability meets the load requirements of the destination circuitry.

Part Context

This part belongs to the CD74ACT646 family of octal bus transceivers manufactured by Texas Instruments. It is functionally compatible with other industry-standard 74ACT646 devices but may differ in packaging or specific manufacturing revisions. The ACT series represents a distinct generation of logic optimized for higher speeds compared to earlier HC or HCT families.

Replacement Considerations

CD74ACT646M96 serves as a parameter-equivalent substitute offering identical logical functionality and electrical specifications.