CD74FCT823ATM

Overview

The CD74FCT823ATM is a high-speed CMOS bus driver from Harris Corporation's FCT series. It features two independent functions, each handling nine bits of data with true output polarity. The device utilizes a 56-terminal plastic small outline package (PDSO56) and operates within a supply voltage range of 4.5 V to 5.5 V, typically at 5 V. It supports an operating temperature range from -40 °C to 85 °C. Key electrical characteristics include a propagation delay of 20 ns and outputs configured as three-state with series resistors. The inputs incorporate bus hold functionality to eliminate the need for external pull-up resistors.

Feature Summary

• Integrates two independent nine-bit bus driver functions in a single package
• Incorporates bus hold inputs to maintain stable logic levels without external components
• Provides three-state outputs equipped with series resistors for signal integrity

Applications

• High-speed parallel data bus interfacing
• Clock distribution networks
• Data buffer applications in industrial control systems

Procurement Notes

Verify the specific suffix 'ATSM96' against the manufacturer's official documentation to confirm pinout compatibility and thermal specifications. Ensure that the procurement source provides traceability to Harris Semiconductor or authorized distributors. Confirm RoHS compliance status if required by project regulations, as older FCT variants may not meet current environmental standards. Cross-reference the datasheet revision date to ensure alignment with current design guidelines.

Selection Notes

Select this component when designing systems requiring high-capacitance load driving capabilities typical of the FCT family. The 20 ns propagation delay suits moderate-speed digital interfaces. Consider the 56-pin footprint constraints during PCB layout. The bus hold feature simplifies circuit design by removing passive components. Evaluate power consumption requirements against the CMOS technology characteristics for low-power applications.

Part Context

This device belongs to the Harris FCT (Fast CMOS Technology) line, designed to bridge the performance gap between standard TTL and advanced CMOS logic. The FCT series emphasizes high speed and low power consumption while maintaining compatibility with existing system architectures. The CD74FCT823 specifically addresses the need for wide-bus buffering in complex digital systems.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with direct replacements only through official Harris Semiconductor cross-reference lists.