74LCXR2245SJ

Overview

The Fairchild Semiconductor 74LCXR2245SJ is an octal bus transceiver featuring non-inverting bidirectional buffers with three-state outputs. Designed for low-voltage applications, it operates within a supply voltage range of 2.3V to 3.6V. The device incorporates 5V tolerant inputs and outputs, facilitating safe interfacing between different logic voltage domains. It utilizes advanced CMOS technology to achieve low power dissipation while maintaining high-speed performance suitable for memory and microcontroller-based systems.

Feature Summary

• Provides eight non-inverting bidirectional data paths with controlled direction via the T/R input
• Features five-volt tolerant inputs and outputs for mixed-voltage system compatibility
• Includes three-state outputs to prevent bus contention during inactive periods
• Utilizes advanced CMOS processes for reduced power consumption and enhanced noise immunity

Applications

• Memory module data bus interfaces
• Microcontroller peripheral communication links
• Bidirectional level shifting between 3.3V and 5V logic domains
• General-purpose bus-oriented data routing in embedded systems

Procurement Notes

Verify the specific suffix 'R' against official datasheets to confirm tape-and-reel packaging status. Ensure the manufacturer designation aligns with current ownership structures following industry acquisitions. Cross-reference pinout configurations with target PCB layouts to guarantee mechanical compatibility. Confirm RoHS compliance documentation matches the production batch requirements for your region.

Selection Notes

Select this component when bidirectional data transfer is required between 3.3V and 5V logic families. The 5V tolerance feature eliminates the need for external level-shifting circuits. Consider the package size and thermal characteristics relative to board space constraints. Evaluate propagation delay specifications against system timing requirements to ensure signal integrity at operating frequencies.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices. It serves as a bidirectional buffer alternative to unidirectional drivers. The octal configuration allows parallel data handling across multiple lines simultaneously. It complements other LCX series components like latches and flip-flops in complex digital designs requiring robust voltage translation capabilities.

Replacement Considerations

Direct substitutes include the 74LCXH2245 and 74LVC2245 variants from various manufacturers. Verify pin compatibility and electrical specifications before substitution. Check for equivalent 5V tolerance ratings and output drive strengths. Ensure the replacement part supports the same supply voltage range and package dimensions.