Diodes Incorporated PI7C9X2G808PRCNJAEX

Overview

PI7C9X2G808PR from Diodes Incorporated is a PCI Express Gen 2 packet switch with configurable 2/5/8-port and 8-lane topology, supporting transparent and non-transparent bridging modes, 2.5 GT/s per lane, 1.2 V core supply, and integrated EEPROM interface for configuration storage. It serves as a high-density interconnect hub in embedded computing systems requiring PCIe expansion behind a single upstream root port.

For engineers reviewing the PI7C9X2G808PR datasheet, PI7C9X2G808PR pinout, PI7C9X2G808PR application, or PI7C9X2G808PR equivalent, this device is selected for PCIe fanout, legacy-to-PCIe bridge aggregation, multi-function endpoint consolidation, and industrial control backplanes where deterministic latency, lane remapping, and hot-plug-aware routing are required.

Technical Context

The PI7C9X2G808PR implements a full PCIe Gen 2 switch fabric with physical layer (PHY), data link layer (DLL), and transaction layer (TLP) processing. It supports up to eight 2.5 GT/s lanes distributed across two to eight downstream ports, with programmable lane assignment and dynamic power management via ASPM L0s/L1 states.

It features dual-mode operation: transparent mode for standard PCIe topology extension and non-transparent (NT) mode for secure inter-processor communication with address translation, interrupt forwarding, and scratchpad memory. Routing decisions are based on Requester ID, TC/VC mapping, and queue priority levels (PH, PD, NPHD, CPLH, CPLD).

Key Specifications

Pinout & Package

PI7C9X2G808PR is housed in a 196-ball Low-Profile Ball Grid Array (LBGA) package with 0.8 mm ball pitch and an exposed thermal pad on the underside for enhanced heat transfer. Pin functions are grouped into PCIe interface signals (40 balls), port-specific signals (21 balls), EEPROM/I²C signals (10 balls), miscellaneous control signals (45 balls), JTAG boundary scan (5 balls), and power pins (75 balls).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PCIe Gen 2 switching applications.

Compared with ASM1083 and PI7C9X2G304, the PI7C9X2G808PR delivers maximum lane/port configurability and full NT bridging in a single device-making it optimal for high-density, multi-domain embedded systems where flexibility and security outweigh minimal cost premium.

Availability

PI7C9X2G808PR is available at Aetrix Electronics and suitable for industrial control backplanes, embedded computing expansion, legacy system modernization, and secure multi-processor interconnects requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for PI7C9X2G808PR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and integrated circuits headquartered in Milpitas, CA, serving industrial, computing, communications, and consumer markets with high-reliability components.

The PI7C9X2G808PR belongs to Diodes' PCIe Switch family, designed specifically for embedded systems needing scalable, low-latency, and secure PCIe interconnect solutions beyond basic fanout-emphasizing configurability, NT bridging, and industrial temperature operation.

FAQ

Does PI7C9X2G808PR support PCIe Gen 3?

No. The PI7C9X2G808PR is strictly PCIe Gen 2 compliant with a maximum signaling rate of 2.5 GT/s. It does not support Gen 3's 5.0 GT/s data rate, nor does its PHY or link training logic accommodate Gen 3 equalization or scrambling requirements. Systems requiring Gen 3 must use a different switch IC.

Can PI7C9X2G808PR operate in standalone mode without external EEPROM?

Yes. The device supports auto-configuration via internal default values when no external EEPROM is present or fails to respond. Default settings include transparent mode, x1 lane width per port, and standard PCIe configuration space initialization-enabling basic functionality without external memory dependency.

What thermal management provisions exist for the 196-ball LBGA package?

The package includes an exposed thermal pad on the bottom surface, which must be soldered to a dedicated copper pour on the PCB for effective heat dissipation. Diodes specifies a θ_JA of 32°C/W under JEDEC JESD51-7 conditions with 2 oz copper and 4 thermal vias-requiring proper layout per datasheet Figure 14-1 for operation within –40°C to +85°C ambient.

Is JTAG boundary scan supported for production testing?

Yes. The PI7C9X2G808PR implements full IEEE 1149.1-compliant JTAG TAP controller with boundary scan register definitions documented in Section 12.3 of DS40341 Rev 9. This enables automated PCB interconnect testing, open/short detection on high-speed traces, and register visibility during manufacturing validation.