MC74ACT646DWG

Overview

The MC74ACT646DWG is an octal registered bus transceiver with 3-state outputs in a 24-lead SOIC package. It operates at a supply voltage of 4.5 V to 5.5 V and features TTL-compatible inputs. The device provides independent registers for A and B buses, enabling multiplexed transmission of real-time or stored data. Propagation delay from clock to bus is typically 12.0 ns at 5.0 V with a 50 pF load.

Feature Summary

• Independent registers for A and B buses allow multiplexed transfer of real-time or stored data
• TTL-compatible inputs ensure compatibility with standard logic families
• Three-state outputs provide isolation when disabled

Applications

• Multiplexed data transmission systems
• Bus-oriented memory architectures
• Control signal routing

Procurement Notes

Verify the datasheet revision (Rev. 8) and confirm the specific ordering suffix matches the required packaging format. Ensure the component meets RoHS compliance requirements for your assembly process. Cross-reference the pinout and electrical characteristics against your system design specifications before finalizing procurement.

Selection Notes

Select this component for applications requiring simultaneous storage and direct bus transfer capabilities. The ACT series offers faster switching speeds compared to standard HC logic. Verify that the operating temperature range of -40°C to +85°C aligns with your environmental constraints.

Part Context

This part belongs to the MC74AC/ACT646 family of octal bus transceivers. It integrates D-type flip-flops with control circuitry to manage data flow between two 8-bit buses. The device supports both true and inverting data paths depending on the configuration.

Replacement Considerations

Check for equivalent parts from other manufacturers such as Texas Instruments CD74ACT646. Ensure functional compatibility regarding pinout, voltage levels, and propagation delays before substitution.