CD74FCT2574ATM

Overview

The CD74FCT2574ATM is an 8-bit bus driver from the FCT series, manufactured by Harris Corporation. It features true output polarity and a 3-state output configuration with integrated series resistors. The device operates on a nominal 5V supply voltage within a range of 4.75V to 5.25V. It utilizes CMOS technology and is housed in a PDSO20 package. Key electrical parameters include a propagation delay of 6.5 ns and a load capacitance of 50 pF. The component supports a wide operating temperature range from -40°C to 85°C.

Feature Summary

• Provides 8-bit data transmission with true output polarity for direct signal interfacing.
• Integrates 3-state outputs with series resistors to manage signal integrity and termination requirements.
• Features bus hold inputs to maintain stable logic states without requiring external pull-up components.

Applications

• High-speed parallel data bus driving in computer systems
• Memory interface buffering and signal conditioning
• Control line distribution in embedded architectures

Procurement Notes

Verify the specific suffix 'ATM' against official Harris documentation to confirm pinout and thermal specifications. Confirm RoHS compliance status as historical records indicate non-compliance for this series. Ensure the supplier provides valid traceability documents for the Harris Corporation manufacturing origin. Cross-reference the part number with current Rochester Electronics listings if Harris production has ceased.

Selection Notes

Select this component when an 8-bit bus driver with inherent series resistance is required to simplify PCB layout. The FCT series offers compatibility with standard logic levels while providing faster switching speeds than older families. Consider the PDSO20 package size constraints and the need for bus hold functionality to eliminate external passive components during design.

Part Context

This device belongs to the Harris CD74FCT family of high-speed CMOS logic devices. The FCT series is designed for applications requiring fast propagation delays and low power consumption. As a bus driver, it serves as a critical interface element between microprocessors and peripheral devices or memory modules in digital circuit designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Verify compatibility with equivalent 8-bit bus drivers from other manufacturers only if datasheet parameters match exactly.