CD74FCT163245ASM

Overview

The CD74FCT163245ASM is an FCT series bus transceiver manufactured by Harris Corporation. It features two independent functions, each handling eight bits of data with true output polarity. The device utilizes CMOS technology and operates within a supply voltage range of 2.7V to 3.6V. It is housed in a 48-SSOP package with a width of 0.295 inches (7.50mm). Key electrical characteristics include a maximum output current of 24mA for both high and low states. The component supports bidirectional data flow and includes three-state outputs with series resistors.

Feature Summary

• Features bus hold inputs that eliminate the need for external pullup resistors
• Provides independent control for dual eight-bit channels
• Utilizes Schmitt trigger input characteristics for noise immunity
• Delivers push-pull output drive capability

Applications

• Bidirectional data bus interfacing in embedded systems
• Memory bus expansion and bridging applications
• High-speed digital signal transmission between logic families

Procurement Notes

Verify the specific voltage variant requirements, as datasheets indicate both 2.7V-3.6V and 1.65V-5.5V ranges for similar part numbers. Confirm RoHS compliance status, as older Harris manufacturing runs may not meet current environmental standards. Ensure the 48-SSOP package footprint matches the target PCB design. Cross-reference the manufacturer designation to confirm Harris Corporation origin versus potential rebranding by Rochester Electronics or other distributors.

Selection Notes

Select this component when designing systems requiring isolated, bidirectional data transfer between different logic domains. The FCT series offers faster switching speeds compared to standard HC or HCT logic families. Consider the independent control feature if separate enable signals are required for each byte lane. Verify that the 24mA drive strength meets the load capacitance requirements of the destination circuitry without excessive signal distortion.

Part Context

This device belongs to the Harris Corporation FCT (Fast CMOS Technology) family, designed for high-performance digital applications. The FCT line bridges the gap between standard TTL and advanced CMOS technologies, offering improved speed while maintaining compatibility. Harris Corporation was a significant semiconductor manufacturer before its logic division was acquired, leading to complex lineage tracking for these components.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Designers should verify pin-to-pin compatibility with equivalent parts from other manufacturers, such as Texas Instruments or ON Semiconductor, ensuring voltage levels and package dimensions align with the original specification.