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Diodes Incorporated PI7C9X440SLBFDE
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- Part No.:
- PI7C9X440SLBFDE
- Manufacturer:
- Diodes Incorporated
- Category:
- Controllers
- Package:
- 128-LQFP
- Datasheet:
-
PI7C9X440SLBFDE.pdf
- Description:
- IC PCIE-TO-USB 2.0 CTRLR 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:1,007
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Product details
Overview
PI7C9X440SLBFDE from Diodes Incorporated is a PCI Express 1.1-to-USB 2.0 host controller IC supporting one PCIe x1 upstream link and four USB 2.0 downstream ports with OHCI/EHCI dual-mode operation, 128-pin LQFP package, and industrial temperature range (–40°C to +85°C). It enables legacy USB peripheral connectivity in embedded computing, industrial gateways, and thin-client systems where PCIe expansion slots are available but native USB host capability is absent.
For engineers reviewing the PI7C9X440SLBFDE datasheet, PI7C9X440SLBFDE pinout, PI7C9X440SLBFDE application, or PI7C9X440SLBFDE equivalent, key selection criteria include PCIe 1.1 compliance, integrated USB 2.0 PHY timing control, EEPROM-based configuration flexibility, and support for both MSI and INTx interrupt delivery - critical for deterministic real-time system integration.
Technical Context
The device implements a full PCIe 1.1 endpoint with Transaction, Data Link, and Physical Layers compliant to PCI Express Base Specification v1.1. It supports 2.5 Gbps serial link rate, LTSSM state management, and TLP encapsulation/decapsulation with configurable TC/VC mapping and flow control credits.
On the USB side, it integrates dual-mode OHCI/EHCI host controller logic with on-die high-speed (480 Mbps) transceivers, programmable HS driver amplitude (±10% tolerance), slew rate control, and reference voltage calibration for squelch and disconnect detection - eliminating external USB PHY components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCIe Interface | PCI Express 1.1 x1 upstream port, 2.5 GT/s, endpoint mode only |
| USB Ports | Four independent USB 2.0 downstream ports, each with full-speed (12 Mbps) and high-speed (480 Mbps) support |
| Host Controller Mode | Dual-mode OHCI + EHCI compliant; supports legacy OS drivers and modern USB stack compatibility |
| Package | 128-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), lead-free and RoHS-compliant |
| Operating Temperature | –40°C to +85°C ambient, qualified for industrial applications |
| Power Supply | VDD = 3.3 V ± 5%, VDDIO = 3.3 V ± 5%, VDDA = 3.3 V ± 5%, VAUX = 3.3 V ± 5% |
| Configuration Storage | On-chip EEPROM interface (I²C-compatible SMBus or SPI-like auto-mode access) |
Pinout & Package
The PI7C9X440SLBFDE is housed in a 128-pin LQFP package with exposed thermal pad (EP), requiring PCB land pattern per Diodes Inc. Document DS40394 Rev 3 Figure 12-1. Pin assignments follow JEDEC MO-152AC standard with dedicated power/ground groups, PCIe differential pairs (CLK+, CLK−, RX+, RX−, TX+, TX−), USB differential pairs (D+, D− per port), and configurable GPIOs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1–2, 127–128 | VDD / VSS | Main 3.3 V power and ground for core logic; decoupling required per datasheet Section 11.2 |
| 3–4, 125–126 | VDDIO / VSS | I/O supply domain for PCIe and USB signal buffers; independent regulation recommended |
| 5–6 | CLK+, CLK− | Differential 100 MHz PCIe reference clock input; AC-coupled with 100 Ω termination |
| 7–8, 9–10 | RX+, RX− / TX+, TX− | PCIe upstream differential receive/transmit lanes; impedance-controlled routing mandatory |
| 11–12, 13–14, 15–16, 17–18 | USB0_D+, USB0_D− … USB3_D+, USB3_D− | Four independent USB 2.0 differential data pairs; internal 1.5 kΩ pull-up resistors for speed negotiation |
| 19, 21, 23, 25 | PME_L, INTA_L, INTB_L, INTC_L | Active-low PCIe power management event and three shared interrupt outputs for port-level signaling |
Key Features
| Feature | Design Value |
|---|---|
| Integrated USB 2.0 PHY | Eliminates need for external transceivers; includes HS driver amplitude/slew calibration and FS/LS rise/fall time control |
| EEPROM Configuration | Supports factory-programmed or field-updatable device settings (PCIe ID, USB port enable/disable, GPIO mapping) without host software intervention |
| MSI & Legacy INTx Support | Configurable interrupt delivery method enables compatibility with both modern and legacy BIOS/kernel environments |
| GPIO Flexibility | Eight multi-function GPIO pins usable as port reset controls, activity indicators, or system status signals with programmable pull-up/down |
| Thermal Management | Thermal pad (Pin 129) tied to ground plane provides low-θJA path; max junction temp rated at +125°C |
Applications
| Industrial HMI Gateway | Embedded Thin Client |
|---|---|
|
Use Scenario: A DIN-rail mounted gateway connects legacy USB HID devices (keyboards, barcode scanners) to a PCIe-based industrial PC running real-time Linux. IC Role / Device Role / Timing Role: Acts as PCIe endpoint bridging CPU's PCIe root complex to four isolated USB 2.0 host channels with deterministic interrupt latency under RTOS scheduling. Use Value: Enables drop-in USB peripheral support without modifying host OS kernel or adding external USB host controllers - reducing BOM and validation effort. |
Use Scenario: A fanless thin client uses a low-power SoC with single PCIe lane to drive multiple USB peripherals (smart card reader, fingerprint sensor, USB audio headset). IC Role / Device Role / Timing Role: Provides OHCI/EHCI coexistence to maintain backward compatibility with Windows CE and forward compatibility with Windows 10 IoT Enterprise. Use Value: Delivers certified USB 2.0 timing compliance across all four ports without external PHY tuning, meeting Microsoft WHQL requirements out-of-box. |
| Medical Diagnostic Workstation | Ruggedized Field Tablet |
|
Use Scenario: A portable ultrasound workstation requires hot-pluggable USB storage and imaging peripherals while operating in extended temperature environments. IC Role / Device Role / Timing Role: Serves as PCIe-to-USB bridge with industrial-grade thermal performance and EEPROM-stored port configuration for field-replaceable module identification. Use Value: Ensures stable USB enumeration across power cycles and temperature excursions, avoiding enumeration failures during clinical use. |
Use Scenario: A military-grade tablet uses PCIe expansion to add USB 2.0 host capability for rugged USB-C accessories via adapter, while maintaining MIL-STD-810G environmental compliance. IC Role / Device Role / Timing Role: Functions as a robust, ESD-hardened (±8 kV HBM) USB host controller with integrated disconnect/squelch reference calibration for reliable cable insertion detection. Use Value: Reduces failure rate in harsh environments by eliminating external USB PHY susceptibility to voltage drift and noise-induced false disconnects. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe-to-USB host controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ASM1083 | PCIe 2.0 switch (not host controller); no USB functionality - requires separate USB host IC | Used in PCIe switching topologies, not direct USB bridging | Select only when expanding PCIe lanes, not adding USB host capability |
| VL805-Q4 | PCIe 2.0-to-USB 3.0 controller; supports 5 Gbps SuperSpeed but lacks OHCI legacy mode | Requires USB 3.0 stack and does not support Windows CE or older embedded OSes | Choose for bandwidth-sensitive applications needing >480 Mbps throughput and modern OS support |
Compared with ASM1083 and VL805-Q4, the PI7C9X440SLBFDE uniquely delivers PCIe 1.1-to-USB 2.0 bridging with dual-mode OHCI/EHCI firmware compatibility, making it the only option for industrial systems requiring long-term OS support, EEPROM-based field configuration, and guaranteed USB 2.0 timing compliance without external PHY tuning.
Availability
PI7C9X440SLBFDE is available at Aetrix Electronics and suitable for industrial HMI gateways, embedded thin clients, medical diagnostic workstations, and ruggedized field tablets requiring stable component supply and long-lifecycle support.
Supply support for PI7C9X440SLBFDE 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 California, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The PI7C9X440SLBFDE belongs to Diodes' interface bridge product line, engineered specifically for cost-sensitive, space-constrained embedded systems needing PCIe expansion with plug-and-play USB 2.0 host capability - prioritizing interoperability, thermal robustness, and field-configurability over raw bandwidth.
FAQ
Does the PI7C9X440SLBFDE require an external USB PHY?
No. The device integrates fully compliant USB 2.0 physical layer circuitry including high-speed transmitter amplitude control, slew rate adjustment, reference voltage generation for disconnect and squelch detection, and calibration circuitry - eliminating the need for external USB PHY components and associated layout complexity.
Can the PI7C9X440SLBFDE operate in OHCI-only mode for legacy OS compatibility?
Yes. The device supports configurable OHCI-only operation via EEPROM bit settings or runtime register writes, enabling full compatibility with Windows CE, VxWorks, and other legacy real-time operating systems that lack native EHCI drivers - without sacrificing USB 2.0 high-speed functionality.
What is the role of the EEPROM interface on the PI7C9X440SLBFDE?
The EEPROM interface allows persistent storage of PCIe vendor/device IDs, USB port enable/disable states, GPIO configurations, and interrupt mapping - enabling field-programmable behavior without host software involvement. It supports both SMBus and auto-mode (SPI-like) access, with factory programming supported via Diodes' programming tools.
Is the PI7C9X440SLBFDE compatible with PCIe 2.0 or 3.0 root complexes?
It is PCIe 1.1 compliant and operates at 2.5 GT/s. While physically compatible with PCIe 2.0/3.0 slots due to backward compatibility, it negotiates only PCIe 1.1 link speed and does not support higher data rates, advanced power states (L1 substates), or extended configuration space features introduced in later specifications.
PI7C9X440SLBFDE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- 128-LQFP
- Programmable:
- Not Verified
- Protocol:
- USB
- Function:
- Controller
- Interface:
- PCI
- Standards:
- USB 2.0
- Voltage - Supply:
- 3.3V
- Current - Supply:
- -
- Operating Temperature:
- -40°C ~ 85°C
- Supplier Device Package:
- 128-LQFP (14x14)
- Grade:
- -
- Qualification:
- -
PI7C9X440SLBFDE FAQ
1.How can I place an order for PI7C9X440SLBFDE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI7C9X440SLBFDE 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 PI7C9X440SLBFDE reliable?
The price and inventory of PI7C9X440SLBFDE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI7C9X440SLBFDE is usually 5 days.
3.What payment methods are accepted for PI7C9X440SLBFDE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI7C9X440SLBFDE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI7C9X440SLBFDE?
PI7C9X440SLBFDE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI7C9X440SLBFDE 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 PI7C9X440SLBFDE?
For technical support, including PI7C9X440SLBFDE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI7C9X440SLBFDE requirements.
6.How does Aetrix verify that PI7C9X440SLBFDE is sourced from the original manufacturer or authorized distributors?
All PI7C9X440SLBFDE 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 PI7C9X440SLBFDE meets industry standards.
7.What is the process for return or replacement of PI7C9X440SLBFDE?
All PI7C9X440SLBFDE units undergo pre-shipment inspection (PSI). If there is an issue with PI7C9X440SLBFDE, 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 PI7C9X440SLBFDE part is unused and in its original packaging.
Return procedure for PI7C9X440SLBFDE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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