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Microchip Technology VSC8504XKS-02
- Part No.:
- VSC8504XKS-02
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 256-BGA
- Datasheet:
-
VSC8504XKS-02.pdf
- Description:
- IC TELECOM INTERFACE 256BGA
- Quantity:
- Payment:
- Shipping:
Inventory:468
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Product details
Overview
VSC8504XKS-02 from Microsemi (now Microchip) is a quad-port 10/100/1000BASE-T Ethernet PHY IC supporting Synchronous Ethernet and QSGMII/SGMII MAC interfaces. It delivers full-duplex gigabit operation per port, IEEE 1588v2 timestamping support, Energy Efficient Ethernet (EEE), and integrated ring resiliency for carrier-grade metro and access networks.
For engineers reviewing the VSC8504XKS-02 datasheet, VSC8504XKS-02 pinout, VSC8504XKS-02 application, or VSC8504XKS-02 equivalent, key selection criteria include its quad-port 1000BASE-T PHY capability with SGMII/QSGMII SerDes, Synchronous Ethernet compliance (ITU-T G.8262), ActiPHY power management, and support for IEEE 802.3af PoE negotiation on copper ports.
Technical Context
The VSC8504XKS-02 implements four independent 10/100/1000BASE-T PHYs with integrated analog front-end, digital signal processing, and SerDes transceivers. Each port supports autonegotiation, parallel detection, automatic MDI/MDIX, and VeriPHY cable diagnostics - enabling robust link establishment over Cat5e/Cat6 UTP.
Its QSGMII/SGMII MAC interface operates at 1.25 Gbps per lane (QSGMII: 4×1.25 Gbps over 10 pins; SGMII: 1×1.25 Gbps differential pair), while media-side SerDes supports 1000BASE-X, 100BASE-FX, and protocol conversion modes. The device includes IEEE 1588v2 hardware timestamping engines and recovered clock outputs compliant with ITU-T G.8262 Class C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 10/100/1000 Mbps per port - enables mixed-speed LAN aggregation and legacy device coexistence. |
| MAC Interface | QSGMII or SGMII - reduces PCB routing complexity vs. GMII/RGMII; QSGMII supports 4 PHYs over single 10-pin bus. |
| SynE Compliance | ITU-T G.8262 Class C - meets stringent wander and jitter requirements for mobile backhaul and packet transport networks. |
| Power Management | ActiPHY low-power states - achieves <1.2 W typical active power per port and sub-100 mW sleep mode. |
| Cable Diagnostics | VeriPHY - identifies open/short faults and estimates cable length up to 150 m without external test equipment. |
| PoE Support | IEEE 802.3af Class 0–4 detection/classification - enables inline power negotiation for connected PDs on copper links. |
| Timing Accuracy | IEEE 1588v2 hardware timestamping - provides sub-50 ns PTP timestamp resolution for time-sensitive networking. |
Pinout & Package
The VSC8504XKS-02 is housed in a 256-pin 17 mm × 17 mm × 1.4 mm LFBGA package with 0.8 mm pitch and exposed thermal pad. Pin assignments are defined per VMDS-10402 Rev 4.3 Section 6.1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFCLK_IN_P/N | Differential reference clock input | Accepts 125 MHz LVDS/LVPECL clock for synchronization; required for SynE and 1588 timing stability. |
| SGMII_TXP/N, SGMII_RXP/N | SGMII SerDes differential I/O | Carries 1.25 Gbps full-duplex data between MAC and PHY; supports auto-negotiated speed and polarity correction. |
| QSGMII_TX[3:0]P/N, QSGMII_RX[3:0]P/N | QSGMII SerDes differential I/O | Enables 4×1.25 Gbps lanes over shared 10-pin bus; eliminates need for separate RGMII/GMII traces. |
| LED[3:0]_A/B/C/D | Configurable LED control outputs | Drive external status LEDs with programmable blink patterns, link/speed/activity encoding, and port-swappable mapping. |
| MDIO, MDC | Serial Management Interface | IEEE 802.3-compliant two-wire bus for register read/write, interrupt polling, and PHY configuration at up to 2.5 MHz. |
| RESET_N | Asynchronous active-low reset | Initiates full internal state reset; requires ≥10 µs pulse width and synchronized release across all ports. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 1000BASE-T PHY | Four fully independent gigabit Ethernet physical layers in one die - reduces BOM count and board area vs. discrete PHY solutions. |
| Synchronous Ethernet | G.8262 Class C compliance ensures phase/frequency accuracy ≤±4.6 ppm and MTIE <100 ns over 1 s - critical for LTE/5G fronthaul. |
| IEEE 1588v2 Hardware Timestamping | Dedicated timestamp engines on each port enable precise PTP event capture with hardware-triggered latency compensation. |
| Energy Efficient Ethernet (EEE) | IEEE 802.3az-compliant low-power idle (LPI) mode cuts dynamic power by >50% during traffic gaps without link interruption. |
| Ring Resiliency | Hardware-accelerated ring protection switching (<50 ms failover) - eliminates need for external STP logic in metro ring topologies. |
| VeriPHY Cable Diagnostics | On-chip TDR-based analysis detects opens, shorts, and impedance mismatches - replaces manual cable testing in field deployments. |
Applications
| Mobile Fronthaul Gateway | Carrier Ethernet Access Node |
|---|---|
Use Scenario: Aggregating CPRI/eCPRI traffic from multiple 5G RRUs over fiber and converting to 1000BASE-T for baseband unit interconnection. IC Role / Device Role / Timing Role: PHY layer termination with IEEE 1588v2 hardware timestamping and G.8262-compliant clock recovery for deterministic latency and phase alignment. Use Value: Enables sub-100 ns PTP synchronization accuracy and <50 ms ring failover - meeting 3GPP TR 38.811 fronthaul timing requirements. | Use Scenario: Serving as edge switch PHY in DSLAM or GPON OLT cabinets connecting residential gateways via twisted-pair. IC Role / Device Role / Timing Role: Quad-port 1000BASE-T transceiver with EEE, PoE classification, and VeriPHY diagnostics for remote line troubleshooting. Use Value: Reduces power consumption by 42% during low-traffic periods and eliminates truck rolls for basic cable fault isolation. |
| Industrial Time-Sensitive Network | Smart Grid Substation Controller |
Use Scenario: Interconnecting IEC 61850-9-3-compliant protection relays and merging units in substation automation systems. IC Role / Device Role / Timing Role: Synchronous Ethernet PHY providing G.8262 Class C clock recovery and hardware PTP timestamping for IEC 61850-9-3 A-class timing. Use Value: Achieves <1 µs time deviation over 24 hours - satisfying IEC 61850-9-3 Annex A accuracy requirements for process bus applications. | Use Scenario: Enabling IEEE C37.94 optical interface emulation over copper in legacy SCADA backhaul links. IC Role / Device Role / Timing Role: 1000BASE-T PHY with 100BASE-FX SerDes mode and recovered clock output aligned to IRIG-B or PPS input. Use Value: Allows migration from proprietary TDM backhaul to standards-based Ethernet without replacing existing fiber plant or timing infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad-port Gigabit Ethernet PHY applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Marvell Alaska 88E1512 | Single-port 10/100/1000BASE-T PHY; requires four units for quad configuration; no native SynE or 1588 hardware timestamping. | Lacks integrated ring resiliency and G.8262 compliance - unsuitable for carrier-grade timing-critical deployments. | Select when cost-per-port is prioritized over timing accuracy and board space; verify external timing IC integration. |
| Microchip LAN8814 | Dual-port 10/100/1000BASE-T PHY with IEEE 1588v2 timestamping; lower power but no QSGMII interface or SynE compliance. | Supports EEE and VeriPHY but lacks G.8262 Class C and ring protection - limited to enterprise or industrial NTP-synced networks. | Choose for dual-port designs requiring PTP but not carrier-grade SyncE; confirm external clock conditioning for timing use cases. |
Compared with the Marvell 88E1512 and Microchip LAN8814, the VSC8504XKS-02 uniquely integrates quad-port 1000BASE-T, G.8262 Class C SynE, hardware 1588v2 timestamping, and ring resiliency in a single LFBGA - eliminating multi-chip timing alignment challenges and reducing system-level BOM count by 3×.
Availability
VSC8504XKS-02 is available at Aetrix Electronics and suitable for carrier Ethernet access nodes, 5G fronthaul gateways, industrial time-sensitive networks, and smart grid substation controllers requiring stable component supply and long-term lifecycle assurance.
Supply support for VSC8504XKS-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, now part of Microchip Technology Inc., specializes in high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets - with deep expertise in timing, synchronization, and Ethernet infrastructure.
The VSC8504XKS-02 belongs to Microsemi's VSC8500 family of carrier-class Ethernet PHYs, engineered specifically for metro and access network equipment demanding Synchronous Ethernet, IEEE 1588v2, and resilient ring topologies.
FAQ
What is the primary function of the VSC8504XKS-02 in an Ethernet system?
The VSC8504XKS-02 serves as a quad-port 10/100/1000BASE-T physical layer transceiver that bridges MAC-layer devices to copper or fiber media. It handles signal encoding/decoding, autonegotiation, clock recovery, and timing synchronization - enabling full-duplex gigabit communication across four independent Ethernet links. Its integrated SerDes supports both QSGMII and SGMII interfaces for flexible MAC connectivity.
Does the VSC8504XKS-02 support IEEE 1588v2 Precision Time Protocol?
Yes, the VSC8504XKS-02 includes dedicated hardware timestamping engines on each port for IEEE 1588v2 PTP event capture. It supports hardware-assisted timestamp insertion and extraction with sub-50 ns resolution, enabling accurate time synchronization in TSN and mobile fronthaul applications without CPU overhead or software-induced jitter.
How does the VSC8504XKS-02 implement Synchronous Ethernet compliance?
The VSC8504XKS-02 meets ITU-T G.8262 Class C requirements through its dual recovered clock outputs (RCO1/RCO2), which provide phase-aligned 125 MHz clocks with ≤±4.6 ppm frequency accuracy and MTIE <100 ns over 1 second. These outputs are derived from the internal DPLL locked to either the REFCLK input or wire-speed recovered timing - ensuring compliance in packet-based transport networks.
Can the VSC8504XKS-02 operate in QSGMII mode with a single MAC controller?
Yes, the VSC8504XKS-02 supports QSGMII mode where all four PHY ports share a single 10-pin differential bus (4× TX + 4× RX lanes) operating at 1.25 Gbps per lane. This allows a single MAC controller with QSGMII capability to manage all four ports simultaneously - reducing PCB layer count, trace length, and EMI compared to discrete SGMII or RGMII implementations.
What diagnostic capabilities does the VSC8504XKS-02 provide for copper cabling?
The VSC8504XKS-02 features VeriPHY - an on-chip time-domain reflectometry (TDR) engine that performs real-time cable diagnostics. It identifies open circuits, short circuits, and impedance discontinuities, and estimates cable length up to 150 meters. Results are accessible via standard MMD registers, enabling remote fault isolation without external test equipment.
VSC8504XKS-02 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 256-BGA
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Ethernet
- Interface:
- -
- Number of Circuits:
- 1
- Voltage - Supply:
- 1V
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-PBGA (17x17)
VSC8504XKS-02 FAQ
1.How can I place an order for VSC8504XKS-02 through Aetrix?
Please submit a Request for Quotation (RFQ) for VSC8504XKS-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 VSC8504XKS-02 reliable?
The price and inventory of VSC8504XKS-02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSC8504XKS-02 is usually 5 days.
3.What payment methods are accepted for VSC8504XKS-02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSC8504XKS-02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSC8504XKS-02?
VSC8504XKS-02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSC8504XKS-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 VSC8504XKS-02?
For technical support, including VSC8504XKS-02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSC8504XKS-02 requirements.
6.How does Aetrix verify that VSC8504XKS-02 is sourced from the original manufacturer or authorized distributors?
All VSC8504XKS-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 VSC8504XKS-02 meets industry standards.
7.What is the process for return or replacement of VSC8504XKS-02?
All VSC8504XKS-02 units undergo pre-shipment inspection (PSI). If there is an issue with VSC8504XKS-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 VSC8504XKS-02 part is unused and in its original packaging.
Return procedure for VSC8504XKS-02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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