PI7C9X442SLBFDE

Overview

The PI7C9X442SLBFDE is a PCI Express to USB 2.0 bridge integrated circuit manufactured by Diodes Incorporated. It integrates a PCIe packet switch with an OHCI/EHCI USB host controller, providing one upstream PCIe lane and four downstream USB ports. The device operates within an ambient temperature range of -40°C to +85°C and utilizes a 128-pin LQFP package. Key electrical parameters include a maximum operating voltage of 1.1 V and a minimum of 900 mV, with a typical operating voltage of 1 V. Power dissipation is rated at 432 mW.

Feature Summary

• Integrates a single-lane PCIe packet switch with four-port USB 2.0 host controller functionality
• Supports peer-to-peer communication between PCIe and USB domains
• Includes EEPROM interface for configuration mapping and System Management Bus (SMBus) support
• Features JTAG boundary scan capability for manufacturing test and debugging

Applications

• PCIe expansion cards requiring multiple USB connectivity
• Industrial computing systems needing robust interface bridging
• Embedded hardware designs integrating legacy USB peripherals via PCIe buses

Procurement Notes

Verify the component against the official datasheet DS40395 Rev 3-2 to confirm pinout compatibility and electrical specifications. Ensure that the procurement channel is authorized by Diodes Incorporated to avoid counterfeit risks. Check for specific ordering suffixes if tape-and-reel packaging or industrial temperature variants are required beyond the standard LQFP-128 configuration.

Selection Notes

Select this component when a design requires converting a single PCIe lane into four USB 2.0 ports without external bridge controllers. Consider the 128-pin LQFP footprint for PCB layout constraints. Verify that the system power supply can maintain the 900 mV to 1.1 V range under peak load conditions to ensure stable operation across the specified temperature range.

Part Context

This part belongs to the PI7C9X series of specialized interface ICs from Diodes Incorporated, formerly Pericom Semiconductor. It serves as a bridge solution connecting high-speed serial PCIe links to parallel USB interfaces. The device is distinct from pure packet switches or pure USB controllers by combining both functionalities in a single silicon die.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult Diodes Incorporated directly for current portfolio updates or equivalent replacement recommendations.