CD74ACT646EN

Overview

The CD74ACT646EN is an octal non-inverting bus transceiver and register manufactured by Texas Instruments. It belongs to the ACT logic series and features three-state outputs. The device operates within a supply voltage range of 4.5 V to 5.5 V. It provides a propagation delay of 12.5 ns and supports low-level output currents of 24 mA and high-level output currents of -24 mA. The component is housed in a 24-pin PDIP package and functions with TTL input levels and CMOS output levels.

Feature Summary

• Octal registered bus transceiver architecture providing eight-bit data storage and bidirectional transfer capabilities.
• Three-state outputs designed for direct connection to system buses without additional pull-up or pull-down components.
• ACT logic series compatibility ensuring TTL input thresholds while delivering CMOS output drive characteristics.

Applications

• High-performance register applications requiring data latching and buffering.
• Bus-oriented memory and I/O systems utilizing standard logic families.
• Clocking circuits where registered data transfer is necessary to minimize bus contention.

Procurement Notes

Verify that the specific part number suffix corresponds to the DIP-24 package configuration, as the M96 variant utilizes SOIC packaging. Confirm RoHS compliance status through official manufacturer documentation prior to integration. Ensure the procurement channel sources genuine Texas Instruments components to guarantee electrical parameter accuracy and long-term reliability in industrial environments.

Selection Notes

Select this component when an octal registered transceiver with ACT speed and power characteristics is required. The PDIP-24 package is suitable for through-hole prototyping or manufacturing. Verify that the system operates strictly within the 4.5 V to 5.5 V supply range to maintain signal integrity and prevent device damage.

Part Context

This device is part of the CD74ACT646 family, which includes variants such as the CD74ACT646M (SOIC) and CD74ACT646M96 (Tape & Reel). While functionally identical regarding logic operations, these alternatives differ in physical packaging and shipping formats. The EN suffix specifically denotes the plastic dual-in-line package style.

Replacement Considerations

The SN74ABT646ANSR serves as a functional alternative within the same product family, offering similar octal registered transceiver capabilities with ABT technology. Cross-referencing datasheets is recommended to verify pinout compatibility and electrical differences between ACT and ABT series specifications.