MC74AC652N

Overview

The MC74AC652N is an octal registered bus transceiver with three-state outputs, manufactured by onsemi. It operates within a supply voltage range of 2 V to 6 V and supports a wide operating temperature range from -40 °C to +85 °C. The device features independent registers for A and B buses, allowing multiplexed real-time and stored data transfers. It provides true output polarity and can source or sink 24 mA per output. The component is housed in a 300 mil Slim Dual-in-Line (PDIP-24) package.

Feature Summary

• Registered bus transceiver architecture with independent storage registers for both A and B buses
• Multiplexed transmission capability enabling direct input-to-output transfer or data storage via D-type flip-flops
• Three-state outputs supporting bus-oriented applications with high drive capability
• Non-inverting data path configuration providing true output logic levels

Applications

• Bus-oriented systems requiring registered data latching
• Microprocessor interface circuits needing bidirectional data handling
• Digital signal routing with simultaneous real-time and stored data paths
• Memory buffer applications utilizing independent register control

Procurement Notes

Verify the specific suffix 'N' confirms the PDIP-24 package variant. Confirm RoHS compliance status as historical documentation may vary. Ensure the procurement channel sources genuine onsemi components to avoid counterfeit registered transceivers. Check current lifecycle status as older AC series parts may have limited availability.

Selection Notes

Select this component when non-inverting octal transceiver functionality with internal registration is required. Compare against the MC74ACT652 if TTL-compatible inputs are necessary for mixed-voltage interfaces. Consider the MC74AC646 if inverting outputs are preferred for the same application topology. Verify package compatibility with existing PCB footprints before finalizing the design.

Part Context

This part belongs to the 74AC logic family, characterized by high-speed operation and low power consumption compared to earlier standard logic types. The MC74AC652N specifically addresses complex data handling needs where bus isolation and temporary storage are critical. It serves as a bridge between high-speed digital buses and peripheral devices requiring stable data latching.

Replacement Considerations

The MC74ACT652 is a functional equivalent offering TTL-compatible inputs while maintaining the same octal registered transceiver architecture. Other manufacturers produce pin-compatible alternatives within the 74AC652 specification, but verify electrical parameters such as propagation delay and output drive strength.