MC74LCX245DTR2G

Overview

The MC74LCX245DTR2G is a low-voltage CMOS octal bidirectional transceiver manufactured by onsemi. It operates from a supply voltage range of 2.0 V to 5.5 V and features five-volt tolerant inputs and outputs, enabling safe interfacing with 5 V devices even when the device supply is lower. The component provides balanced output sink and source current capabilities of 24 mA at both A and B ports. It includes an Output Enable input that places ports in a high-impedance state when active, and a Transmit/Receive input that controls data flow direction. The device supports live insertion and withdrawal and guarantees high impedance when VCC is 0 V.

Feature Summary

• Features five-volt tolerant inputs and outputs for direct interface with 5 V TTL logic
• Provides balanced 24 mA output drive capability at both A and B ports
• Supports live insertion and withdrawal operations
• Guarantees high-impedance state via IOFF specification when VCC equals 0 V

Applications

• Memory address driving applications
• TTL level bus oriented transceiver systems
• Low-voltage to 5-volt logic interface circuits

Procurement Notes

Verify the specific ordering suffix and package type against the manufacturer's official datasheet before procurement. Confirm RoHS compliance status and automotive qualification requirements if applicable to your design. Ensure the selected variant matches the required lead-free and moisture sensitivity levels for your assembly process. Cross-reference the part number with authorized distributors to confirm current availability and manufacturing status.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer between different voltage domains, specifically involving 5 V tolerant interfaces. Consider its 24 mA drive strength for moderate load conditions and its near-zero static supply current for power-sensitive designs. Evaluate the TSSOP-20 package constraints against your PCB layout requirements and thermal management needs.

Part Context

This part belongs to the MC74LCX245 series of low-voltage CMOS octal transceivers produced by onsemi. The series is characterized by high performance and compatibility with LVTTL and LVCMOS standards. It is designed for applications requiring reliable data transmission across buses with varying voltage levels while maintaining low power consumption and robust noise immunity.

Replacement Considerations

Check for compatible alternatives within the same LCX family or other manufacturers offering similar octal transceivers with 5 V tolerance. Verify pinout compatibility and electrical specifications such as propagation delay and output current before substitution.