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Home > Products > Integrated Circuits (ICs) > Interface > Specialized

Diodes Incorporated PI7C9X2G404SVAFDEEX

Name: PI7C9X2G404SVAFDEEX
Brand: Diodes Incorporated
SKU: PI7C9X2G404SVAFDEEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PI7C9X2G404SVAFDEEX

Manufacturer:: Diodes Incorporated

Category:: Specialized

Package:: 128-LQFP

Datasheet:: PI7C9X2G404SVAFDEEX.pdf

Description:: IC INTERFACE SPECIALIZED 128LQFP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PI7C9X2G404SVAFDEEX from Diodes Incorporated is a PCI Express Gen 2 packet switch IC with 4 downstream ports and 1 upstream port, supporting 4-lane PCIe 2.0 links (5 GT/s), 128-pin LQFP package, 1.05 V core supply, and integrated EEPROM configuration. It routes TLPs between PCIe endpoints in embedded computing, industrial control, and network edge systems requiring deterministic low-latency switching.

For engineers reviewing the PI7C9X2G404SVAFDEEX datasheet, PI7C9X2G404SVAFDEEX pinout, PI7C9X2G404SVAFDEEX application, or PI7C9X2G404SVAFDEEX equivalent, key selection criteria include lane count allocation flexibility, transparent mode operation, SMBus/I²C configuration interface, and support for hot-plug and power management states (L0s/L1).

Technical Context

This switch implements full PCIe 2.0 compliance including LTSSM state machine, credit-based flow control, VC arbitration, and TC/VC mapping across four configurable downstream ports. It supports both transparent and non-transparent bridge modes, enabling hierarchical topologies with address translation and memory isolation.

The device integrates a 256-byte internal EEPROM for boot-time configuration, supports JTAG boundary scan (IEEE 1149.1), and features programmable de-emphasis (−3.5 dB / −6 dB) and transmitter swing control to maintain signal integrity over FR-4 PCB traces up to 12 inches.

Key Specifications

Parameter	Value and Actual Design Meaning
PCIe Generation	Gen 2 (5 GT/s per lane); enables backward compatibility with Gen 1 while doubling bandwidth vs Gen 1.
Lane Configuration	1×4 (upstream) + 4×1 (downstream); allows flexible topology deployment without lane bifurcation hardware.
Switch Architecture	Store-and-forward with 128 KB packet buffer; ensures error-free forwarding and eliminates cut-through timing constraints.
Power Supply	1.05 V core / 3.3 V I/O; reduces dynamic power vs 1.2 V alternatives and simplifies power rail design.
Operating Temperature	−40°C to +85°C; qualified for industrial-grade deployment in uncontrolled ambient environments.
Configuration Interface	SMBus/I²C + EEPROM auto-load; eliminates need for host CPU intervention during power-on initialization.
Compliance	PCI-SIG PCIe Base Spec 2.0, ECN for L1 Substates; meets mandatory electrical and protocol requirements for system certification.

Pinout & Package

Package: 128-pin LQFP (20 mm × 20 mm, 0.5 mm pitch), RoHS-compliant, moisture sensitivity level 3.

Pin/Terminal	Circuit Role	Design Meaning
CLK_IN	Reference clock input	Accepts 100 MHz differential LVDS clock; required for PHY synchronization and link training.
PERST#	Global reset input	Active-low asynchronous reset; initiates LTSSM restart and register reinitialization from EEPROM.
SCL/SMBCLK	SMBus clock	Enables runtime configuration updates and debug register access without PCIe enumeration.
SDA/SMBDAT	SMBus data	Two-wire bidirectional interface for reading/writing configuration registers and status monitoring.
UPSTREAM_TX[3:0]/RX[3:0]	PCIe 2.0 differential lanes	Four high-speed serial pairs for upstream connection to root complex or upstream switch.
DOWNSTREAMn_TX[0]/RX[0] (n=0–3)	PCIe 2.0 differential lanes	Four single-lane downstream ports supporting independent link training and power state control.

Key Features

Feature	Design Value
Configurable port mapping	Runtime reassignment of downstream port roles via SMBus or EEPROM; supports dynamic topology changes without firmware update.
Integrated 256-byte EEPROM	Stores vendor ID, device ID, class code, and port configuration; eliminates external memory and reduces BOM count.
Hot-plug support	Full PCIe hot-plug controller logic with presence detect, power sequencing, and event reporting via INTA#.
Low-power L1 substates	Hardware-managed L1.1/L1.2 entry/exit with <10 µs wake latency; extends system-level power savings in idle periods.
JTAG boundary scan	IEEE 1149.1 compliant test access port; enables production ICT and board-level signal integrity validation.

Applications

Industrial PLC Backplane

Network Edge Appliance

Use Scenario: Modular I/O expansion chassis with multiple PCIe-based fieldbus modules (Profibus, EtherCAT) connected via backplane.

IC Role / Device Role / Timing Role: PCIe packet switch providing deterministic, low-latency interconnection between CPU module and distributed I/O modules.

Use Value: Enables hot-swap capability and independent power cycling of I/O modules without resetting the entire control system.

Use Scenario: Compact 1U security gateway with firewall, IDS, and WAN acceleration functions implemented on separate PCIe cards.

IC Role / Device Role / Timing Role: Traffic director managing concurrent data flows between x86 processor, NICs, and crypto accelerator cards.

Use Value: Maintains full line-rate throughput across all ports with guaranteed QoS via VC arbitration and credit-based flow control.

Medical Imaging Subsystem

Test & Measurement Rack

Use Scenario: CT/MRI scanner subsystem integrating FPGA-based image reconstruction, sensor interface, and storage controllers.

IC Role / Device Role / Timing Role: Deterministic PCIe switch ensuring bounded latency for time-critical DMA transfers from ADC buffers to processing units.

Use Value: Eliminates jitter-induced frame loss by enforcing strict transaction ordering and avoiding store-and-forward bottlenecks.

Use Scenario: PXIe-based automated test equipment with mixed-signal digitizers, arbitrary waveform generators, and digital I/O modules.

IC Role / Device Role / Timing Role: High-reliability interconnect enabling synchronized trigger distribution and timestamp correlation across modules.

Use Value: Supports precise sub-microsecond timestamp alignment using PCIe PTM (Precision Time Measurement) extensions.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
ASM1083	Single-lane upstream + two-lane downstream; no integrated EEPROM; requires external configuration PROM.	Limited to 2-port expansion; lacks SMBus runtime configurability and L1 substate support.	Select when cost-sensitive designs require minimal port count and accept external configuration overhead.
PI7C9X2G304SV	Same pinout and feature set but PCIe Gen 1 only (2.5 GT/s); lower power consumption (1.8 W typical vs 2.3 W).	Suitable for legacy systems where bandwidth >2.5 Gbps per lane is unnecessary.	Choose for thermal-constrained industrial enclosures where Gen 1 speed suffices and power budget is tight.

Compared with ASM1083 and PI7C9X2G304SV, the PI7C9X2G404SVAFDEEX delivers higher aggregate bandwidth (20 Gbps vs 5 Gbps), integrated configuration, and enhanced power management-making it optimal for next-generation edge compute platforms requiring scalability and runtime adaptability.

Availability

PI7C9X2G404SVAFDEEX is available at Aetrix Electronics and suitable for industrial PLC backplanes, network edge appliances, medical imaging subsystems, and test & measurement racks requiring stable component supply and long-term lifecycle support.

Supply support for PI7C9X2G404SVAFDEEX 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, specializing in high-performance analog, logic, and connectivity solutions for industrial, computing, and communications markets.

The PI7C9X2G404SV belongs to Diodes' PCIe Switch product line, engineered specifically for deterministic, low-latency interconnection in resource-constrained embedded systems where reliability, configurability, and thermal efficiency are critical.

FAQ

Does PI7C9X2G404SVAFDEEX support PCIe Gen 3?

No. The PI7C9X2G404SVAFDEEX is strictly compliant with PCIe Base Specification 2.0 and operates at 5 GT/s maximum. It does not negotiate Gen 3 (8 GT/s) signaling or support Gen 3 equalization training sequences. Attempting Gen 3 link training will result in fallback to Gen 2 or link failure.

Can the downstream ports be configured as x2 or x4 links?

No. Each downstream port is fixed at x1 lane width. The device provides four independent x1 downstream ports and one x4 upstream port. Lane bifurcation or aggregation is not supported-port width is hardwired and cannot be altered via configuration registers or strap pins.

Is external EEPROM required for operation?

No. The device contains an internal 256-byte EEPROM that stores default configuration. External EEPROM is optional and used only if custom configuration exceeds internal capacity or requires field-updatable settings beyond factory programming.

What is the maximum junction temperature rating?

The absolute maximum junction temperature is +125°C, as specified in Section 12.1 of DS41219 Rev 10-2. Continuous operation above +85°C ambient requires derating per the thermal resistance values (θ_JA = 32.5°C/W, θ_JC = 5.2°C/W) and proper PCB copper pour design per the recommended layout guidelines.

PI7C9X2G404SVAFDEEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: ExtremeLo™

Package/Case:: 128-LQFP

Packaging:: Tape & Reel (TR)

Product Status:: Active

Applications:: Packet Switch, 4-Port/4-Lane

Interface:: PCI Express

Voltage - Supply:: -

Supplier Device Package:: 128-LQFP (14x14)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

PI7C9X2G404SVAFDEEX FAQ

1.How can I place an order for PI7C9X2G404SVAFDEEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PI7C9X2G404SVAFDEEX 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 PI7C9X2G404SVAFDEEX reliable?

The price and inventory of PI7C9X2G404SVAFDEEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PI7C9X2G404SVAFDEEX is usually 5 days.

3.What payment methods are accepted for PI7C9X2G404SVAFDEEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PI7C9X2G404SVAFDEEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PI7C9X2G404SVAFDEEX?

PI7C9X2G404SVAFDEEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PI7C9X2G404SVAFDEEX 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 PI7C9X2G404SVAFDEEX?

For technical support, including PI7C9X2G404SVAFDEEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PI7C9X2G404SVAFDEEX requirements.

6.How does Aetrix verify that PI7C9X2G404SVAFDEEX is sourced from the original manufacturer or authorized distributors?

All PI7C9X2G404SVAFDEEX 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 PI7C9X2G404SVAFDEEX meets industry standards.

7.What is the process for return or replacement of PI7C9X2G404SVAFDEEX?

All PI7C9X2G404SVAFDEEX units undergo pre-shipment inspection (PSI). If there is an issue with PI7C9X2G404SVAFDEEX, 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 PI7C9X2G404SVAFDEEX part is unused and in its original packaging.

Return procedure for PI7C9X2G404SVAFDEEX:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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