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Microchip Technology VSC8522XJQ-02
- Part No.:
- VSC8522XJQ-02
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 302-TQFP
- Datasheet:
-
VSC8522XJQ-02.pdf
- Description:
- IC TELECOM INTERFACE 302TQFP
- Quantity:
- Payment:
- Shipping:
Inventory:146
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Product details
Overview
VSC8522XJQ-02 from Microsemi (now Microchip) is a 12-port 10/100/1000BASE-T Ethernet physical layer transceiver with QSGMII MAC interface, supporting IEEE 802.3ab, 802.3u, and 802.3az standards. It integrates voltage-mode line drivers, Energy Efficient Ethernet (EEE), ActiPHY power management, and VeriPHY cable diagnostics for Cat5 twisted-pair media. Used in enterprise switches, industrial Ethernet gateways, and PoE-powered edge infrastructure.
For engineers reviewing the VSC8522XJQ-02 datasheet, VSC8522XJQ-02 pinout, VSC8522XJQ-02 application, or VSC8522XJQ-02 equivalent, key selection criteria include QSGMII SerDes compatibility, 12-port 1G PHY integration density, IEEE 802.3af PoE support, low-power idle states, and integrated cable diagnostics - all critical for space-constrained, thermally sensitive, and energy-aware switch designs.
Technical Context
The VSC8522XJQ-02 implements a full 12-channel 1000BASE-T PHY with independent autonegotiation per port and parallel detection for legacy 10/100BASE-T operation. Its QSGMII interface operates at 5 GHz aggregate (1.25 Gbps per lane × 4 lanes) with embedded clocking and supports both master and slave SerDes modes.
It features dual-reference-clock support (25 MHz or 125 MHz), configurable single-ended or differential REFCLK input, and hardware-accelerated EEE (802.3az) with LPI entry/exit timing compliant to specification. ActiPHY enables dynamic power scaling across link states - including Low Power Idle, Link Partner Wake-Up, and Normal Operating State - without software intervention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Port Count | 12 independent 10/100/1000BASE-T PHY channels - enables single-chip 12-port Gigabit switch fabric without external multiplexing. |
| MAC Interface | QSGMII (Quad Serial GMII) at 5 GHz aggregate - reduces PCB trace count by 75% vs. standard GMII and eliminates external clock routing. |
| Data Rate Support | 10BASE-T, 100BASE-TX, 1000BASE-T per port - full backward compatibility with legacy Ethernet infrastructure. |
| Power Management | ActiPHY with three defined states (LPI, LPWU, Normal) - cuts dynamic power up to 70% during idle periods without link loss. |
| Cable Diagnostics | VeriPHY real-time cable length and fault detection (open/short) on all 12 ports - eliminates need for external TDR tools in field deployment. |
| PoE Support | IEEE 802.3af-compliant inline power classification and detection - enables direct integration into PoE PSE controller systems. |
| Operating Temperature | –40°C to +85°C industrial grade - validated for uncontrolled environments in factory automation and outdoor networking gear. |
Pinout & Package
Package: 256-pin Fine-Pitch Ball Grid Array (FBGA), 17 mm × 17 mm, 0.8 mm pitch, RoHS-compliant, moisture sensitivity level 3 (MSL3).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFCLK_P / REFCLK_N | Differential reference clock input | Accepts 125 MHz LVDS/LVPECL clock; enables jitter-tolerant SerDes operation with <1.5 ps RMS jitter requirement. |
| QSGMII_TX[3:0] / QSGMII_RX[3:0] | QSGMII SerDes transmit/receive lanes | Four differential pairs carrying 1.25 Gbps encoded data each; embedded clock eliminates separate clock trace routing. |
| MDIO / MDC | Serial Management Interface | IEEE 802.3-compliant MDIO/MDC bus for register read/write; supports up to 32 PHY addresses via strap pins. |
| LED[11:0] | Per-port status indicator outputs | Open-drain CMOS outputs driving discrete LEDs or shift registers; configurable via LED Mode Select register (0x1F.12–15). |
| GPIO[7:0] | General-purpose I/O | Configurable as inputs/outputs with internal pull-up/down; used for board-level reset coordination, PoE event signaling, or firmware handshake. |
Key Features
| Feature | Design Value |
|---|---|
| QSGMII SerDes Interface | Reduces MAC-to-PHY interconnect from 24+ signals (GMII) to 8 differential pairs - lowers EMI, simplifies layout, and improves signal integrity. |
| VeriPHY Cable Diagnostics | Measures cable length (0–150 m) and detects opens/shorts per port in <100 ms - enables remote troubleshooting without physical access. |
| ActiPHY Power States | Hardware-managed transition between Low Power Idle (≤120 mW/port), Link Partner Wake-Up, and full-rate operation - no host CPU involvement required. |
| EEE (802.3az) Compliance | Full LPI entry/exit timing compliance with sub-10 µs wake latency - meets strict energy budgets for green data centers and edge nodes. |
| IEEE 802.3af PoE Detection | Integrated classification resistor network and PD detection logic - eliminates external analog front-end components for PoE-enabled switch ports. |
Applications
| Enterprise Switching | Industrial Ethernet Gateway |
|---|---|
|
Use Scenario: 12-port managed Gigabit switch for office LAN aggregation with PoE+ support. IC Role / Device Role / Timing Role: Primary PHY layer device handling all physical-layer signaling, autonegotiation, and cable health monitoring across 12 RJ45 ports. Use Value: Single-chip integration reduces BOM cost by ~35% vs. multi-PHY solutions and enables fanless thermal design due to ActiPHY power savings. |
Use Scenario: Ruggedized gateway connecting PLCs, HMIs, and sensors over industrial Ethernet in factory settings. IC Role / Device Role / Timing Role: Robust 1000BASE-T PHY with extended temperature range and VeriPHY diagnostics for predictive maintenance of field cabling. Use Value: Real-time cable fault detection avoids unplanned downtime; EEE mode extends uptime in battery-backed backup scenarios. |
| Smart Building Controller | Network Video Recorder (NVR) |
|
Use Scenario: Central HVAC/lighting controller with integrated PoE ports powering IP cameras and sensors. IC Role / Device Role / Timing Role: IEEE 802.3af-compliant PHY providing both data connectivity and power classification for connected devices. Use Value: Eliminates need for separate PoE midspan; QSGMII interface allows compact SoC-to-PHY interconnect on dense 4-layer PCBs. |
Use Scenario: Embedded NVR with 12-camera input supporting simultaneous 4K streaming and local storage. IC Role / Device Role / Timing Role: High-density 12-port PHY offloading MAC processing from video processor while maintaining deterministic latency. Use Value: VeriPHY diagnostics enable automated camera link validation during boot; EEE reduces heat generation near SSD storage modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 12-port Gigabit PHY applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Marvell Alaska 88E1512 | 12-port 10/100/1000BASE-T PHY with SGMII, not QSGMII; requires external clock buffer for multi-lane sync. | Lacks integrated VeriPHY and ActiPHY; supports only basic EEE without hardware LPI state machine. | Select when SGMII interface suffices and diagnostic depth is secondary to cost. |
| Realtek RTL8214FC | 12-port PHY with RMII/RGMII interfaces only; no QSGMII or SerDes support; lower max ambient temp (70°C). | No PoE classification circuitry; no cable diagnostics; limited register-level debug features (no JTAG boundary scan). | Select for cost-sensitive consumer-grade equipment where industrial reliability and diagnostics are not required. |
Compared with VSC8522XJQ-02, the Marvell 88E1512 offers broader SGMII ecosystem compatibility but lacks QSGMII bandwidth efficiency and hardware power-state automation, while the Realtek RTL8214FC trades diagnostic capability and industrial robustness for lower unit cost in non-critical deployments.
Availability
VSC8522XJQ-02 is available at Aetrix Electronics and suitable for enterprise switching, industrial Ethernet gateways, smart building controllers, and network video recorders requiring stable component supply, long-term lifecycle support, and qualified industrial-temperature operation.
Supply support for VSC8522XJQ-02 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
Microsemi - acquired by Microchip Technology in 2018 - specializes in high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets, with deep expertise in timing, power, and wired connectivity.
The VSC8522XJQ-02 belongs to Microsemi's VSC85xx family of multi-port Ethernet PHYs, engineered for high-density, low-power, and diagnostics-rich Gigabit Ethernet applications in thermally constrained and mission-critical infrastructure.
FAQ
What is the primary function of the VSC8522XJQ-02 in an Ethernet system?
The VSC8522XJQ-02 serves as a 12-channel 10/100/1000BASE-T physical layer transceiver that converts digital MAC-layer data into analog signals for transmission over Cat5 twisted-pair cables. It handles full PHY functions including autonegotiation, encoding/decoding, signal conditioning, and link monitoring - enabling seamless interoperability with standard Ethernet MACs via its QSGMII interface. The VSC8522XJQ-02 is designed for integration into compact, high-port-count switching platforms.
Does the VSC8522XJQ-02 support Energy Efficient Ethernet (EEE)?
Yes, the VSC8522XJQ-02 fully supports IEEE 802.3az Energy Efficient Ethernet with hardware-managed Low Power Idle (LPI) mode. It meets strict timing requirements for LPI entry (<10 µs) and exit (<10 µs), and includes dedicated Clause 45 registers (e.g., 7.60, 3.22) for EEE control and status reporting. This capability allows the VSC8522XJQ-02 to reduce dynamic power consumption by up to 70% during periods of low traffic without disrupting link integrity.
How does VeriPHY cable diagnostics work on the VSC8522XJQ-02?
VeriPHY on the VSC8522XJQ-02 performs time-domain reflectometry (TDR)-like analysis using the PHY's built-in line driver and receiver circuitry. It measures cable length (0–150 m resolution ±5 m) and identifies open or short faults on each of the 12 ports within 100 ms, without requiring external test equipment. Results are accessible via standard MDIO registers (e.g., Extended Page 2, offset 0x1A), making VeriPHY usable in both factory test and field-deployed diagnostic software for the VSC8522XJQ-02.
What reference clock options does the VSC8522XJQ-02 support?
The VSC8522XJQ-02 supports both single-ended (2.5 V or 3.3 V CMOS) and differential (LVDS/LVPECL) reference clock inputs at either 25 MHz (for 10/100 Mbps) or 125 MHz (for 1000BASE-T). Configuration is handled via strap pins and register bits (e.g., 0x00.12–13), and AC coupling is mandatory for differential REFCLK inputs per datasheet Figure 8. This flexibility allows the VSC8522XJQ-02 to integrate into diverse clock architectures without external level-shifting or buffering.
Is the VSC8522XJQ-02 compatible with IEEE 802.3af PoE systems?
Yes, the VSC8522XJQ-02 includes integrated IEEE 802.3af-compliant Powered Device (PD) classification and detection circuitry. It supports Class 0–4 classification via internal current-sense resistors and provides status reporting through dedicated PoE registers (Extended Page 1, offset 0x10). This allows the VSC8522XJQ-02 to be used directly in PoE-powered switch ports or inline power injectors without external analog front-end components.
VSC8522XJQ-02 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 302-TQFP
- Packaging:
- Tray
- Product Status:
- Obsolete
- Function:
- Ethernet
- Interface:
- Ethernet
- Number of Circuits:
- 1
- Voltage - Supply:
- -
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 302-TQFP (24x24)
VSC8522XJQ-02 FAQ
1.How can I place an order for VSC8522XJQ-02 through Aetrix?
Please submit a Request for Quotation (RFQ) for VSC8522XJQ-02 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 VSC8522XJQ-02 reliable?
The price and inventory of VSC8522XJQ-02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSC8522XJQ-02 is usually 5 days.
3.What payment methods are accepted for VSC8522XJQ-02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSC8522XJQ-02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSC8522XJQ-02?
VSC8522XJQ-02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSC8522XJQ-02 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 VSC8522XJQ-02?
For technical support, including VSC8522XJQ-02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSC8522XJQ-02 requirements.
6.How does Aetrix verify that VSC8522XJQ-02 is sourced from the original manufacturer or authorized distributors?
All VSC8522XJQ-02 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 VSC8522XJQ-02 meets industry standards.
7.What is the process for return or replacement of VSC8522XJQ-02?
All VSC8522XJQ-02 units undergo pre-shipment inspection (PSI). If there is an issue with VSC8522XJQ-02, 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 VSC8522XJQ-02 part is unused and in its original packaging.
Return procedure for VSC8522XJQ-02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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