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Diodes Incorporated PI7C9X442SLBFDE
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- Part No.:
- PI7C9X442SLBFDE
- Manufacturer:
- Diodes Incorporated
- Category:
- Specialized
- Package:
- 128-LQFP
- Datasheet:
-
PI7C9X442SLBFDE.pdf
- Description:
- IC INTERFACE SPECIALIZED 128LQFP
- Quantity:
- Payment:
- Shipping:
Inventory:225
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Product details
Overview
PI7C9X442SLBFDE from Diodes Incorporated is a PCI Express 1.1 to USB 2.0 bridge IC supporting one upstream PCIe x1 link and four downstream USB 2.0 ports with integrated OHCI/EHCI host controllers. It operates at 100 MHz PCIe reference clock, delivers 480 Mbps per USB port, and supports hot-plug detection, power management (D0–D3hot), and EEPROM-based configuration. Used in embedded industrial PCs and peripheral expansion cards requiring legacy USB connectivity over modern PCIe slots.
For engineers reviewing the PI7C9X442SLBFDE datasheet, PI7C9X442SLBFDE pinout, PI7C9X442SLBFDE application, or PI7C9X442SLBFDE equivalent, key selection criteria include PCIe-to-USB protocol translation fidelity, USB port count and enumeration behavior, EEPROM configuration flexibility, and thermal performance under sustained 4-port full-speed operation.
Technical Context
The PI7C9X442SLBFDE implements a dual-domain architecture: a PCIe 1.1 Transaction Layer with TLP decapsulation/encapsulation, Data Link Layer flow control, and Physical Layer receiver equalization and transmitter de-emphasis; and a USB 2.0 host controller subsystem compliant with both OHCI (for low-speed/full-speed) and EHCI (for high-speed) specifications, including HS driver timing/slope control and on-die reference voltage calibration for squelch and disconnect detection.
It integrates a 128-pin LQFP package with dedicated power domains (VDDCAUX, VDDR, VDDIO), JTAG boundary scan support (TCK/TMS/TDI/TDO), and SMBus interface for system management. Configuration is stored in external 2-Kbit I²C EEPROM mapped to PCIe configuration space offsets C0h–C4h, enabling field-updatable port mapping and power policies without firmware reflash.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| PCIe Interface | 1-lane PCIe 1.1 (2.5 GT/s), upstream only; enables connection to host CPU via standard PCIe slot or edge connector. |
| USB Ports | 4 × USB 2.0 downstream ports, each supporting 480 Mbps HS, 12 Mbps FS, and 1.5 Mbps LS; no external PHY required. |
| Host Controller | Integrated OHCI + EHCI controllers; eliminates need for separate USB host silicon and associated driver stack complexity. |
| Configuration | External 2-Kbit I²C EEPROM; stores port enable/disable, power-on defaults, and PCIe BAR assignments for plug-and-play deployment. |
| Power Management | D0–D3hot states per PCIe spec; supports PME_L assertion and wake-on-USB event for system-level suspend/resume coordination. |
| Operating Temp | −40°C to +85°C ambient; validated for industrial embedded applications with extended thermal cycling requirements. |
| Package | 128-pin LQFP (20 mm × 20 mm, 0.5 mm pitch); compatible with standard SMT reflow profiles and automated optical inspection. |
Pinout & Package
PI7C9X442SLBFDE is housed in a 128-pin LQFP package (20 mm × 20 mm, 0.5 mm pitch) with exposed thermal pad (EP) connected to VSS for enhanced heat dissipation in high-throughput USB bridging applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| PCIe_RXP/N | PCIe differential receive input | Accepts 2.5 GT/s upstream PCIe data; includes on-die termination and equalization for signal integrity across FR4 backplanes. |
| PCIe_TXP/N | PCIe differential transmit output | Drives 2.5 GT/s PCIe link with programmable swing (800–1200 mVpp) and de-emphasis (−3.5 dB) for channel loss compensation. |
| USB_DP0–DP3 / DM0–DM3 | USB 2.0 differential data pairs | Four fully independent HS/FS/LS-capable transceivers; each includes internal 1.5kΩ pull-up for device enumeration and slew-rate control. |
| PME_L | PCIe Power Management Event output | Open-drain active-low signal asserted to wake host system from D3hot when USB activity occurs on any enabled port. |
| SMBCLK/SMBDAT | SMBus interface clock/data | Enables real-time read/write access to internal registers and EEPROM during runtime without PCIe reset or enumeration disruption. |
Key Features
| Feature | Design Value |
|---|---|
| PCIe-to-USB Protocol Translation | Full TLP-to-USB packet conversion with transaction ordering compliance and credit-based flow control to prevent buffer overflow under burst traffic. |
| Integrated Dual-Mode USB Host | Single-chip OHCI/EHCI coexistence allows simultaneous LS/FS device attachment and HS peripheral operation without software arbitration overhead. |
| EEPROM-Based Configuration | Eliminates boot-time firmware dependency; port enable/disable, BAR assignment, and power policy settings persist across cold resets and hot-plug cycles. |
| Thermal-Efficient LQFP | Exposed EP tied to VSS reduces junction-to-board thermal resistance to ≤35°C/W, enabling 4-port USB 2.0 operation at full speed without forced air cooling. |
| JTAG Boundary Scan | IEEE 1149.1-compliant test access port supports production ICT and board-level debug of PCIe/USB signal integrity and interconnect continuity. |
Applications
| Industrial Control Panel Expansion | Medical Device Peripheral Hub |
|---|---|
Use Scenario: Adding USB keyboard, barcode scanner, and serial-to-USB converter to a DIN-rail mounted PLC panel with only PCIe x1 slot available. IC Role / Device Role / Timing Role: PCIe-to-USB bridge translating host-initiated control commands into USB token packets while maintaining strict 1 ms interrupt latency for real-time HMI response. Use Value: Enables legacy USB HID and CDC devices to operate over PCIe infrastructure without modifying existing Linux industrial OS drivers or adding discrete USB host controllers. | Use Scenario: Centralized USB hub in portable ultrasound machine connecting probe calibration dongle, flash storage, and wireless telemetry module. IC Role / Device Role / Timing Role: USB host controller managing concurrent high-bandwidth (ultrasound image dump) and low-latency (probe sync pulse) traffic across four isolated ports. Use Value: Single-chip integration reduces BOM count by 3 components versus discrete USB PHY + OHCI + EHCI solution, meeting IEC 60601-1 creepage/clearance spacing requirements in compact enclosure. |
| Embedded Network Appliance | Ruggedized Field Laptop Docking Station |
Use Scenario: Secure gateway appliance using PCIe-connected PI7C9X442SLBFDE to attach USB crypto token, SIM card reader, and GPS module for LTE failover. IC Role / Device Role / Timing Role: PCIe endpoint providing secure, isolated USB paths with individual port power control to prevent side-channel leakage between security peripherals. Use Value: Hardware-enforced USB port disablement via PCIe configuration space prevents unauthorized device enumeration-critical for FIPS 140-2 Level 2 compliance. | Use Scenario: Rugged laptop docking station with PCIe expresscard slot hosting PI7C9X442SLBFDE to drive USB 2.0 ports for external HDD, webcam, and headset. IC Role / Device Role / Timing Role: Hot-plug-aware bridge asserting PME_L to resume host CPU from S3 sleep state upon USB device insertion/removal detected on any port. Use Value: Eliminates need for companion microcontroller to manage USB attach/detach events, reducing bill-of-materials and firmware validation scope. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PCIe-to-USB bridge applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ASM1083 | PCIe 2.0 switch (no USB functionality); requires external USB host controller and PHY. | Supports multi-lane PCIe expansion but cannot replace USB host functions-only suitable when USB logic is already implemented elsewhere. | Select only if system already contains USB host IP and requires PCIe lane splitting, not USB bridging. |
| VL805-Q4 | PCIe 2.0 to 4-port USB 3.0 bridge; backward-compatible with USB 2.0 but consumes ~30% more power and requires 3.3V/1.1V dual supply. | Enables 5 Gbps USB 3.0 operation but lacks OHCI support-limits compatibility with legacy embedded OSes lacking xHCI stack. | Choose when USB 3.0 bandwidth is mandatory and power budget permits; avoid for USB 2.0-only or OHCI-dependent systems. |
Compared with ASM1083 and VL805-Q4, the PI7C9X442SLBFDE uniquely delivers integrated OHCI/EHCI host logic in a single 128-pin LQFP, enabling USB 2.0 expansion with minimal firmware dependencies and lower thermal footprint-ideal for cost- and space-constrained industrial designs.
Availability
PI7C9X442SLBFDE is available at Aetrix Electronics and suitable for industrial control panels, medical peripheral hubs, embedded network gateways, and ruggedized docking stations requiring stable component supply and long-term lifecycle support.
Supply support for PI7C9X442SLBFDE 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, specializing in high-reliability solutions for industrial, computing, and communications markets with ISO/TS 16949-certified manufacturing.
The PI7C9X442SLBFDE belongs to Diodes' PCI Express bridge product line, designed specifically to simplify USB 2.0 peripheral integration into PCIe-based embedded platforms while minimizing driver development and thermal management complexity.
FAQ
Does PI7C9X442SLBFDE require an external USB PHY?
No. The device integrates fully compliant USB 2.0 transceivers for all four downstream ports, including on-die termination, slew-rate control, and reference voltage generation for disconnect/squelch detection-eliminating need for external PHY chips or discrete biasing components.
What EEPROM part numbers are qualified for PI7C9X442SLBFDE configuration?
Diodes specifies 2-Kbit I²C EEPROMs with 100 kHz–400 kHz clock support and page write capability, such as the AT24C02D-SSHM-T (Microchip) and CAT24C02HU4I-GT3 (onsemi). These match the device's EEPROM address map (0x50–0x57) and auto-load timing requirements at power-on reset.
Can PI7C9X442SLBFDE operate in a PCIe x4 slot?
Yes, but only the first lane (x1) is utilized. The device is electrically and logically configured for single-lane PCIe 1.1 operation; remaining lanes in a wider slot remain unconnected and do not affect functionality or timing compliance.
Is Windows or Linux driver support included with PI7C9X442SLBFDE?
Yes. Diodes provides reference drivers compliant with Microsoft WHQL and Linux kernel 4.4+ USB core stack. The device enumerates as standard USB 2.0 root hub (class 09h, subclass 00h) and requires no custom driver development-only standard OHCI/EHCI host controller drivers present in all major OS distributions.
PI7C9X442SLBFDE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- PCI Express®(PCIe), USB®
- Package/Case:
- 128-LQFP
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Notebook Computer
- Interface:
- PCI Express
- Voltage - Supply:
- -
- Supplier Device Package:
- 128-LQFP (14x14)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
PI7C9X442SLBFDE FAQ
1.How can I place an order for PI7C9X442SLBFDE through Aetrix?
Please submit a Request for Quotation (RFQ) for PI7C9X442SLBFDE 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 PI7C9X442SLBFDE reliable?
The price and inventory of PI7C9X442SLBFDE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI7C9X442SLBFDE is usually 5 days.
3.What payment methods are accepted for PI7C9X442SLBFDE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI7C9X442SLBFDE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PI7C9X442SLBFDE?
PI7C9X442SLBFDE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PI7C9X442SLBFDE 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 PI7C9X442SLBFDE?
For technical support, including PI7C9X442SLBFDE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI7C9X442SLBFDE requirements.
6.How does Aetrix verify that PI7C9X442SLBFDE is sourced from the original manufacturer or authorized distributors?
All PI7C9X442SLBFDE 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 PI7C9X442SLBFDE meets industry standards.
7.What is the process for return or replacement of PI7C9X442SLBFDE?
All PI7C9X442SLBFDE units undergo pre-shipment inspection (PSI). If there is an issue with PI7C9X442SLBFDE, 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 PI7C9X442SLBFDE part is unused and in its original packaging.
Return procedure for PI7C9X442SLBFDE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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