PI7C9X2G404SLBQFDEX

Overview

The PI7C9X2G404SLBQFDEX is an automotive-grade PCI Express 2.1 packet switch featuring four x1 downstream ports and one x1 or x2 upstream port. It operates within a -40°C to +85°C temperature range and complies with AEC-Q100 Grade 3 standards. The device supports up to 512-byte maximum payload sizes and provides typical latency of less than 150ns for non-blocking packet switching. Power consumption is typically 650mW in L0 mode and 200mW in L1 mode. It integrates a 100MHz clock buffer per downstream port and utilizes a 128-pin LQFP package measuring 14mm x 14mm.

Feature Summary

• Supports cut-through and store-and-forward switching modes with programmable driver current and de-emphasis levels at individual ports.
• Includes integrated reliability features such as data poisoning, end-to-end CRC, advanced error reporting, and IEEE 1149.1 JTAG interface support.
• Enables comprehensive power management through link states (L0, L0s, L1, L2) and device states (D0, D3Hot, D3Cold), including 3.3V Aux power support in D3Cold.
• Facilitates platform efficiency via Access Control Service (ACS), Address Translation (AT) packets for SR-IOV, Latency Tolerance Reporting (LTR), and Optimized Buffer Flush Fill (OBFF).

Applications

• Automotive Telematics and Infotainment systems
• In-vehicle Wireless Access Points and Routers
• Vehicle-to-Vehicle (V2V) communication systems
• Advanced Driver Assistance Systems (ADAS)
• Safety and Security platforms

Procurement Notes

Verify the component against the official Diodes Incorporated product brief to confirm AEC-Q100 Grade 3 qualification status. Ensure the specific ordering suffix matches the required tape and reel packaging configuration. Cross-reference the package dimensions and pin count to validate compatibility with the target PCB footprint before finalizing procurement orders.

Selection Notes

Select this model when a four-port PCIe expansion solution is required for automotive environments operating between -40°C and +85°C. Consider the 128-pin LQFP package if board space constraints favor surface-mount technology over the alternative aQFN option. Evaluate the power dissipation requirements against system cooling capabilities, noting the distinct power profiles for L0 and L1 operational modes.

Part Context

This component belongs to the PI7C9X2G404xxQ family of automotive-compliant switches. It shares core specifications with variants like the PI7C9X2G404ELQ but differs in package type. The SLBQFDEX designation specifically indicates the 128-pin LQFP form factor with tape and reel packaging, distinguishing it from tray-packed or differently packaged siblings within the same functional family.

Replacement Considerations

Direct substitutes within the same family include the PI7C9X2G404ELQZXAEX, which offers identical electrical performance in a 136-pin aQFN package. Verify that any replacement maintains the required AEC-Q100 Grade 3 certification and thermal characteristics suitable for the intended automotive application environment.