74LCXH32245GX

Overview

The Fairchild Semiconductor 74LCXH32245GX is a low voltage 32-bit bidirectional transceiver featuring five-volt tolerant inputs and outputs with bus hold functionality. It operates within a supply voltage range of 2.3V to 3.6V, utilizing a 96-LFBGA package. The device supports live insertion and withdrawal while implementing patented noise and EMI reduction circuitry for signal integrity.

Feature Summary

• Provides 32-bit bidirectional data transmission capability
• Features five-volt tolerant inputs and outputs for mixed-voltage interfacing
• Includes bus hold circuitry to maintain stable logic states
• Supports live insertion and withdrawal operations

Applications

• Bus-oriented applications requiring level shifting between voltage domains
• High-density digital systems utilizing 32-bit data paths
• Interfaces involving mixed 2.5V/3.3V and 5V signal environments

Procurement Notes

Verify the specific suffix 'GX' against the manufacturer's current documentation to confirm package dimensions and pinout compatibility. Ensure that the five-volt tolerance specifications align with the target system's input requirements. Confirm availability status as older revisions may have been superseded by updated manufacturing runs.

Selection Notes

Select this component when a high-pin-count transceiver is required for wide data buses in low-voltage environments. The inclusion of bus hold features makes it suitable for noisy environments or open-bus conditions. Compare power consumption characteristics against similar LCX series devices to ensure compliance with thermal constraints in dense PCB layouts.

Part Context

This part belongs to the LCXH family of low-voltage CMOS transceivers designed for demanding interface applications. It extends the standard LCX245 architecture to support 32-bit widths, addressing the need for reduced footprint in high-bandwidth data transfer scenarios compared to multiple parallel octal transceivers.

Replacement Considerations

Public confirmed substitute part numbers include 74LCXH32245G.

FAQ

What is the function of the bus hold feature?

The bus hold feature maintains the last known logic state on the inputs, preventing floating pins from causing excessive current consumption or oscillation during inactive periods.

Can this device interface directly with 5V signals?

Yes, the inputs and outputs are five-volt tolerant, allowing direct interfacing with 5V signal environments while operating at lower supply voltages such as 2.5V or 3.3V.