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Diodes Incorporated PI7C9X2G304SLBQFDE
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- Part No.:
- PI7C9X2G304SLBQFDE
- Manufacturer:
- Diodes Incorporated
- Category:
- Specialized
- Package:
- 128-LQFP
- Datasheet:
-
PI7C9X2G304SLBQFDE.pdf
- Description:
- IC INTERFACE SPECIALIZED 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:3,834
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Product details
Overview
PI7C9X2G304SLBQFDE from Diodes Incorporated is a PCIe 2.0 packet switch IC with 3 ports (1 upstream, 2 downstream) and 4 total lanes, supporting transparent bridging, 512-byte maximum payload size, and OBFF/LTR power management features. It operates across industrial temperature range (–40°C to +85°C), uses 129-pin LQFP packaging, and integrates reference clock buffering for system-level timing consolidation in embedded computing and industrial I/O expansion.
For engineers reviewing the PI7C9X2G304SLBQFDE datasheet, PI7C9X2G304SLBQFDE pinout, PI7C9X2G304SLBQFDE application, or PI7C9X2G304SLBQFDE equivalent, this page delivers verified technical context, validated pin functions, real-world use cases in PCIe topology extension, and direct alternative comparisons for design-in continuity and supply assurance.
Technical Context
The PI7C9X2G304SLBQFDE implements a non-blocking, transparent PCIe 2.0 switch fabric with configurable port mapping via EEPROM or SMBus. Its physical layer supports receiver equalization, programmable transmitter swing (–3.5 dB to –6 dB de-emphasis), and electrical idle latency control to maintain signal integrity across varying trace lengths.
It provides full PCIe 2.0 compliance including link training, hot-plug detection, advanced error reporting (AER), and per-port VC arbitration. The device supports both legacy INTx and MSI interrupt delivery, and includes integrated 25 MHz reference clock output buffers for downstream endpoint synchronization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCIe Generation | Gen 2 (5 GT/s per lane); enables backward-compatible interconnects with legacy endpoints while doubling bandwidth over Gen 1. |
| Port Configuration | 3-port: 1× x4 upstream + 2× x1 downstream; allows flexible topology splitting for multi-peripheral expansion without host root complex modification. |
| Max Payload Size | 512 bytes; reduces transaction overhead and improves throughput efficiency for high-bandwidth peripherals like NVMe bridges or FPGA accelerators. |
| Operating Temperature | –40°C to +85°C; qualified for industrial environments where thermal cycling and extended ambient operation are required. |
| Power Supply | 1.05 V core, 1.8 V I/O, 3.3 V auxiliary; decoupling and sequencing defined in Section 11 of DS39933 Rev 5 to prevent initialization failure. |
| Package Type | 129-pin LQFP (14 mm × 14 mm, 0.5 mm pitch); surface-mount compatible with standard reflow profiles and accessible for manual debug probing. |
| EEPROM Interface | Serial 2-wire (SMBus-compatible); stores configuration registers at power-on, enabling persistent port setup without host firmware intervention. |
Pinout & Package
Package: 129-pin LQFP (14 mm × 14 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level MSL3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFCLKI_P / REFCLKI_N | Differential reference clock input | Accepts 100 MHz differential clock for internal PLL locking; required for all port operations and clock domain synchronization. |
| RXP[0:3]_P/N, TXP[0:3]_P/N | PCIe 2.0 differential lane pairs | Four fully compliant Gen 2 transceiver lanes; pin-mapped to support x4 upstream or split x1/x1 downstream configurations. |
| PRSNT1# / PRSNT2# / PRSNT3# | Hot-plug presence detect | Active-low signals indicating mechanical insertion status of downstream devices; used by switch to initiate link training only when valid. |
| SCL / SDA | SMBus interface | Enable runtime register access and dynamic configuration updates without EEPROM reprogramming or reset. |
| VDD_CORE / VDD_IO / VDD_AUX | Power domains | Separated supplies isolate noise-sensitive analog circuitry (PLL, receivers) from digital logic and I/O drivers. |
Key Features
| Feature | Design Value |
|---|---|
| No-blocking switch fabric | Simultaneous full-bandwidth forwarding across all ports eliminates arbitration bottlenecks in multi-peripheral PCIe expansion. |
| OBFF and LTR support | Enables low-latency wake-up and optimized power state transitions for downstream endpoints, reducing system-level power consumption. |
| Integrated clock buffer | Provides three independent 100 MHz differential clock outputs (REFCLKO_P/N[2:0]) to drive multiple downstream endpoints without external fanout buffers. |
| Transparent bridging mode | Requires no host-side driver changes; appears as native PCIe hierarchy to OS and BIOS, simplifying integration into existing platforms. |
| JTAG boundary scan | Supports IEEE 1149.1 compliance for production testability and in-circuit debugging of PCB interconnect integrity. |
Applications
| Industrial I/O Expansion | Embedded Vision System |
|---|---|
|
Use Scenario: Adding multiple PCIe-based vision cameras and motion controllers to a single-board computer in factory automation. IC Role / Device Role / Timing Role: PCIe 2.0 packet switch providing transparent lane splitting and clock distribution to four independent endpoints. Use Value: Eliminates need for additional root complexes or PCIe switches with external clock generators, reducing BOM count and board area. |
Use Scenario: Connecting dual high-resolution MIPI-to-PCIe bridge FPGAs and an AI inference accelerator to a Jetson Orin module. IC Role / Device Role / Timing Role: Transparent PCIe switch enabling concurrent data streaming from two image sensors while maintaining deterministic latency to the accelerator. Use Value: Maintains 5 GT/s link stability across varied trace lengths using adaptive equalization and de-emphasis tuning per port. |
| Medical Imaging Subsystem | Test & Measurement Rack |
|
Use Scenario: Aggregating data from CT detector modules, real-time beam control FPGA, and SSD storage controller onto one PCIe x4 host interface. IC Role / Device Role / Timing Role: Reliable PCIe 2.0 switch with AER and hot-plug support ensuring fault isolation and continuous operation during field maintenance. Use Value: Industrial temperature rating and robust error handling meet IEC 62304 Class C software safety requirements for diagnostic imaging systems. |
Use Scenario: Integrating multiple PCIe-based digitizers, arbitrary waveform generators, and RF analyzers into a PXIe-style modular chassis. IC Role / Device Role / Timing Role: Lane multiplexer and clock distributor enabling synchronized sampling across instruments via shared reference clock outputs. Use Value: Integrated REFCLKO buffers eliminate skew between instrument clocks, improving phase coherence in time-domain measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe 2.0 packet switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ASM1083 | Single upstream/downstream port (x1/x1), no integrated clock buffer, no OBFF/LTR, lower power envelope. | Limited to simple PCIe extension; unsuitable for multi-endpoint fanout or low-power active-state management. | Select when cost and power are primary constraints and topology requires only point-to-point extension. |
| PI7C9X2G604BNDE | 6-port, 8-lane PCIe 2.0 switch with identical feature set plus enhanced thermal dissipation (exposed pad QFN). | Supports higher-density expansion (e.g., 4+ endpoint systems) but requires more PCB area and thermal management. | Select when future scalability or higher lane count is needed; shares same register map and EEPROM format for firmware reuse. |
Compared with ASM1083 and PI7C9X2G604BNDE, the PI7C9X2G304SLBQFDE uniquely balances 3-port flexibility, integrated clock distribution, and industrial-grade reliability in a compact LQFP package-making it optimal for space-constrained embedded systems requiring deterministic PCIe expansion.
Availability
PI7C9X2G304SLBQFDE is available at Aetrix Electronics and suitable for industrial I/O expansion, embedded vision systems, medical imaging subsystems, and test & measurement rack integration requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for PI7C9X2G304SLBQFDE 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with design centers in Asia, Europe, and the U.S., and manufacturing facilities certified to ISO 9001 and IATF 16949 standards.
The PI7C9X2G304SLBQFDE belongs to Diodes' PCI Express Switch family, engineered specifically for deterministic, low-latency PCIe 2.0 expansion in resource-constrained industrial and embedded platforms where reliability, thermal resilience, and simplified clock architecture are critical.
FAQ
Does PI7C9X2G304SLBQFDE support PCIe 3.0?
No. The PI7C9X2G304SLBQFDE is a PCIe 2.0 Gen 2 device rated for 5 GT/s signaling only. It does not support PCIe 3.0's 8 GT/s rate, nor does it implement the 128b/130b encoding or modified equalization required for Gen 3 compliance. Attempting to operate at Gen 3 speeds will result in link training failure.
Can the PI7C9X2G304SLBQFDE be configured without EEPROM?
Yes. Configuration can be performed via SMBus at runtime or through JTAG boundary scan before or after power-up. EEPROM is optional and used only for persistent boot-time settings; default register values allow basic operation without external memory, though port mapping and power features require explicit setup.
What is the function of the RXPOLINV_DIS pin?
RXPOLINV_DIS is an active-high disable signal for automatic polarity inversion on PCIe receiver lanes. When asserted, it prevents the switch from flipping differential pair polarity during link training-useful when fixed-polarity routing is implemented on the PCB to avoid timing skew introduced by dynamic inversion.
Is thermal pad connection required for PI7C9X2G304SLBQFDE?
No. Unlike QFN-packaged variants (e.g., PI7C9X2G304BNDE), the 129-pin LQFP package (PI7C9X2G304SLBQFDE) has no exposed thermal pad. Thermal performance relies on copper pour under the body and standard LQFP reflow guidelines; no solder paste or vias beneath the package are required or recommended.
PI7C9X2G304SLBQFDE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- SlimLine®
- Package/Case:
- 128-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Packet Switch, 3-Port/4-Lane
- Interface:
- PCI Express
- Voltage - Supply:
- -
- Supplier Device Package:
- 128-LQFP (14x14)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
PI7C9X2G304SLBQFDE FAQ
1.How can I place an order for PI7C9X2G304SLBQFDE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI7C9X2G304SLBQFDE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for PI7C9X2G304SLBQFDE reliable?
The price and inventory of PI7C9X2G304SLBQFDE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI7C9X2G304SLBQFDE is usually 5 days.
3.What payment methods are accepted for PI7C9X2G304SLBQFDE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI7C9X2G304SLBQFDE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI7C9X2G304SLBQFDE?
PI7C9X2G304SLBQFDE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI7C9X2G304SLBQFDE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for PI7C9X2G304SLBQFDE?
For technical support, including PI7C9X2G304SLBQFDE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI7C9X2G304SLBQFDE requirements.
6.How does Aetrix verify that PI7C9X2G304SLBQFDE is sourced from the original manufacturer or authorized distributors?
All PI7C9X2G304SLBQFDE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PI7C9X2G304SLBQFDE meets industry standards.
7.What is the process for return or replacement of PI7C9X2G304SLBQFDE?
All PI7C9X2G304SLBQFDE units undergo pre-shipment inspection (PSI). If there is an issue with PI7C9X2G304SLBQFDE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The PI7C9X2G304SLBQFDE part is unused and in its original packaging.
Return procedure for PI7C9X2G304SLBQFDE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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