PI7C9X7954BFDEX

Controllers Overview

The PI7C9X7954BFDEX is a PCI Express to Quad UART bridge manufactured by Diodes Incorporated. It integrates four independent UART channels with a PCIe interface, supporting data rates up to 15 Mb/s per channel. The device operates on 1.8 V and 3.3 V power supplies within an industrial temperature range of -40°C to +85°C. It utilizes a 128-pin LQFP package and supports standard RS-232, RS-422, and RS-485 protocols. Key specifications include 128-byte memory size per channel, MSI interrupt support, and automated flow control capabilities.

Controllers Feature Summary

• Integrates four independent UART channels connected via a single PCI Express link
• Supports multiple serial communication standards including RS-232, RS-422, and RS-485
• Features automated hardware flow control and internal loopback testing modes
• Includes Message Signaled Interrupt (MSI) capability for efficient system notification

Controllers Applications

• Industrial automation systems requiring multiple serial connections
• Telecommunications infrastructure equipment
• Embedded computing platforms needing PCIe expansion for serial I/O
• Data acquisition systems utilizing high-speed serial communication

Controllers Procurement Notes

Verify the specific ordering suffix BFDEX against the manufacturer's current datasheet revision DS40138 Rev 2-2 to confirm packaging type and reel specifications. Ensure compatibility with the target PCB footprint for the 128-pin LQFP package. Confirm moisture sensitivity levels and reflow soldering profiles prior to assembly.

Controllers Selection Notes

Select this component when a design requires four distinct UART interfaces accessible through a single PCIe slot or controller. Consider the 128-pin LQFP package constraints regarding board space and thermal dissipation. Evaluate the need for MSI interrupts versus legacy interrupt lines based on the host system architecture.

Controllers Part Context

This part belongs to the PI7C9X795x family of PCIe-to-UART bridges from Diodes Incorporated. It serves as a specialized interface solution for converting high-speed PCIe signals into standard asynchronous serial data streams. The device simplifies system design by consolidating multiple serial ports onto a single peripheral bus connection.

Controllers Replacement Considerations

Consult the official datasheet for confirmed substitute part numbers within the same product family. Verify pinout compatibility and register mapping before substituting with other models in the PI7C9X series.