74LCXH2245WMX

Overview

The onsemi 74LCXH2245WMX is a low-voltage bidirectional transceiver featuring eight non-inverting buffers with three-state outputs. Designed for bus-oriented applications, it operates within a supply voltage range of 2.0V to 3.6V. The device incorporates active bushold circuitry on data inputs to eliminate external pull-up resistors. It includes integrated series resistors in the B port outputs to reduce overshoot and undershoot. The component utilizes advanced CMOS technology for high-speed operation while maintaining low power dissipation.

Feature Summary

• Active bushold circuitry eliminates the need for external pull-up or pull-down resistors on unused or floating data inputs.
• Integrated series resistors in the B port outputs help reduce output overshoot and undershoot.
• Five-volt tolerant control inputs allow compatibility with various logic families.
• Patented noise and EMI reduction circuitry is implemented within the design.

Applications

• Bus-oriented applications requiring bidirectional data flow
• Low voltage (2.5V and 3.3V) VCC system interfacing
• High-speed digital signal transmission

Procurement Notes

Verify the specific ordering code suffix 'X' corresponds to tape and reel packaging as indicated in the datasheet. Confirm that the component meets JEDEC J-STD-020B standards for lead-free packages. Ensure environmental compliance documentation aligns with project requirements before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer between buses operating at low voltages. The inclusion of bushold functionality simplifies input handling for floating lines. Consider the integrated series resistors on the B port if signal integrity improvements regarding overshoot are necessary for the specific application environment.

Part Context

This part belongs to the LCXH family of low-voltage CMOS logic devices manufactured by Fairchild Semiconductor, now part of onsemi. The standard version without the 'X' suffix typically comes in tube packaging, whereas the 'X' suffix denotes availability in tape and reel format for automated assembly processes.

Replacement Considerations

Public confirmed substitute part numbers: MC74LCX245DWG, MC74LCX245DWR2G.

FAQ

What is the function of the T/R input?

The T/R input determines the direction of data flow through the device, controlling whether data moves from Bus A to Bus B or vice versa.

How does the OE input affect the device?

The OE input disables both the A and B ports by placing them in a high impedance state when activated.

What is the purpose of the bushold feature?

Bushold ensures that unused or floating data inputs remain at a valid logic level without requiring external pull-up or pull-down resistors.