74LCXH245WMX

Overview

The onsemi 74LCXH245WMX is an octal bidirectional transceiver featuring non-inverting buffers with three-state outputs. It operates within a supply voltage range of 2.0V to 3.6V and utilizes advanced CMOS technology for high-speed performance while maintaining low power dissipation. The device incorporates patented bushold circuitry on its data inputs, which eliminates the need for external pull-up or pull-down resistors to maintain valid logic levels on unused or floating lines. It provides ±24mA output drive capability at 3.0V and includes 5V tolerant control inputs.

Feature Summary

• Patented bushold input circuitry maintains valid logic states without external resistors
• Three-state outputs allow bus isolation via the OE input pin
• 5V tolerant control inputs enable safe interfacing with higher voltage systems
• Advanced CMOS fabrication ensures high speed operation with minimal power consumption

Applications

• Bus-oriented applications requiring bidirectional data transfer
• Asynchronous 8-line data communication between buses
• Systems utilizing mixed voltage domains with 5V control signals

Procurement Notes

Verify the specific package variant against the datasheet ordering codes, as the 'X' suffix indicates tape and reel packaging. Confirm that the component meets RoHS standards if required by your manufacturing process. Ensure that all unused control inputs are tied to a defined logic level during operation to prevent undefined behavior.

Selection Notes

Select this component when designing systems that require robust handling of floating bus lines without adding passive components. The bushold feature simplifies PCB layout compared to standard transceivers. Verify that the operating voltage falls within the 2.0V to 3.6V range and that the propagation delay specifications meet the timing requirements of your target application.

Part Context

This part belongs to the LCXH family of low-voltage bidirectional transceivers. It is manufactured by onsemi, formerly Fairchild Semiconductor. The device is designed for general-purpose digital logic applications where reliable data transmission across multiple lines is necessary in low-voltage environments.

Replacement Considerations

Check for updated part numbers due to Fairchild integration into ON Semiconductor, where underscores may be replaced by dashes. Verify pin compatibility and electrical characteristics before substituting with other octal bus transceivers from different manufacturers.