MC74LCX245DT

Overview

The MC74LCX245DT is a low-voltage CMOS octal transceiver manufactured by onsemi. It operates from a 2.0 V to 5.5 V supply and features 5 V tolerant inputs and outputs, enabling safe interfacing with 5 V devices even when the supply voltage is below 5.0 V. The device provides non-inverting bidirectional data transmission controlled by Transmit/Receive and Output Enable signals. It supports live insertion and withdrawal, offers 24 mA balanced output drive capability, and includes an IOFF specification for high impedance during power-off states.

Feature Summary

• Provides bidirectional data transmission between two ports using a single direction control input.
• Features 5 V tolerant inputs and outputs for direct interface with 5 V TTL logic systems.
• Supports live insertion and withdrawal without causing system damage or signal corruption.
• Guarantees high impedance state on all ports when the supply voltage is zero via IOFF specification.

Applications

• Memory address driving in embedded systems
• TTL level bus oriented transceiver applications
• Interfacing low-voltage logic with 5 V compatible peripherals

Procurement Notes

Verify the specific suffix against the manufacturer's current datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing process. Confirm that the ordering code matches the exact pin configuration and electrical characteristics required for your circuit design before finalizing procurement.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer between different voltage domains. It is suitable for applications needing 5 V tolerance while operating at lower supply voltages. Consider its 24 mA drive strength for driving moderate capacitive loads. Verify compatibility with LVTTL and LVCMOS standards for seamless integration into existing digital logic architectures.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices. It functions as an octal bus transceiver, providing eight independent channels for data movement. The device is designed for high-speed operation while maintaining low power dissipation, making it ideal for battery-powered and portable electronic applications requiring efficient data routing.

Replacement Considerations

Check for equivalent parts such as MC74LCX245DTR2G which shares similar electrical characteristics but may differ in packaging format. Ensure any substitute maintains the same 5 V tolerance and bidirectional functionality. Verify pinout compatibility to avoid redesigning the printed circuit board layout during replacement.