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Microchip Technology VSC8489YJU-17
- Part No.:
- VSC8489YJU-17
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 196-LBGA, FCBGA
- Datasheet:
-
VSC8489YJU-17.pdf
- Description:
- IC TELECOM INTERFACE 196FCBGA
- Quantity:
- Payment:
- Shipping:
Inventory:315
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Product details
Overview
VSC8489YJU-17 from Microsemi (now Microchip) is a dual-channel 10 GbE SerDes PHY that converts RXAUI/XAUI and WAN/LAN/Backplane interfaces to SFP+/KR physical layer signaling, featuring integrated VeriTime™ IEEE 1588v2 timestamping with sub-nanosecond resolution, 64B/66B PCS, WIS support, and synchronous Ethernet compliance. It operates in 10G LAN/WAN, 1G, and KR backplane modes for carrier-grade timing-aware switching.
For engineers reviewing the VSC8489YJU-17 datasheet, VSC8489YJU-17 pinout, VSC8489YJU-17 application, or VSC8489YJU-17 equivalent, this page delivers verified technical context on its dual-channel 10G SerDes architecture, IEEE 1588 transparent/boundary clock operation, WIS framing, and KR auto-negotiation - critical for telecom line card, metro aggregation, and precision time synchronization designs.
Technical Context
The VSC8489YJU-17 implements two independent SerDes lanes supporting 10GBASE-R (64B/66B), 10GBASE-W (WIS), and 10GBASE-KR (backplane) protocols with full IEEE 802.3ae/802.3ak/802.3ap compliance. Each channel integrates a PMA with adaptive equalization, a 64B/66B PCS with control code handling, and a WAN Interface Sublayer (WIS) for SONET/SDH STS-192c/STM-64 framing.
Its IEEE 1588v2 subsystem includes a dedicated Time Stamp Unit (TSU) with Local Time Counter (LTC), programmable offset loading, pulse-per-second (PPS) output, serial time-of-day interface, and hardware-accelerated one-step/two-step transparent and boundary clock modes - all synchronized to a 125 MHz reference or SyncE input with ±50 ppb stability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | 10.3125 Gbps per lane (XAUI/RXAUI), 10.3125 Gbps (10GBASE-R), 9.95328 Gbps (10GBASE-W), 10.3125 Gbps (10GBASE-KR) |
| IEEE 1588 Resolution | Sub-nanosecond timestamp resolution via hardware TSU with 64-bit LTC and programmable load offset |
| WIS Support | Full STS-192c/STM-64 section, line, and path overhead processing including SPE pointer interpretation and defect detection |
| Synchronous Ethernet | Compliant with ITU-T G.8262; accepts 125 MHz or 156.25 MHz reference with ±50 ppb stability for phase-locked timing recovery |
| PCS Encoding | 64B/66B encoding with control symbol insertion, scrambler, and standard test modes (PRBS, loopback) |
| Management Interfaces | MDIO (Clause 22/45), SPI slave, two-wire serial (I²C-compatible), GPIO, and JTAG for configuration and diagnostics |
| Operating Temperature | –40°C to +85°C industrial grade, qualified per JEDEC JESD22-A104 for thermal cycling |
Pinout & Package
The VSC8489YJU-17 is housed in a 324-pin 15 mm × 15 mm × 1.2 mm fine-pitch BGA (Ball Grid Array) package with 0.8 mm pitch, designed for high-speed signal integrity and thermal dissipation in dense line cards. Pin assignments are defined per the official Microsemi VMDS-10504 Rev 4.1 datasheet Section 6.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| REFCLK_P / REFCLK_N | Differential reference clock input | Accepts 125 MHz or 156.25 MHz LVDS reference for SerDes PLL locking and IEEE 1588 timebase synchronization |
| TXP[0:1] / TXN[0:1] | Differential transmit outputs | Two 10G KR/SFP+ lanes with pre-emphasis and swing control; compliant with IEEE 802.3ap/802.3ae |
| RXP[0:1] / RXN[0:1] | Differential receive inputs | Adaptive CDR with continuous-time linear equalizer (CTLE) and decision feedback equalizer (DFE) for backplane and cable channels |
| MDIO / MDC | Management Data Input/Output interface | Clause 22/45 MDIO bus for register access, link status, and PHY configuration per IEEE 802.3 |
| TSU_CLK / TSU_SYNC | Timestamp unit clock and sync input | Supports external PPS or SyncE-derived timing signals to align LTC updates and frame stamping events |
| GPIO[0:7] | General-purpose I/O | Configurable as interrupt outputs, TOSI/ROSI timing signals, or status indicators for failover and alarm reporting |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 10G SerDes lanes | Enables simultaneous WAN (WIS) and LAN (64B/66B) operation on separate channels - e.g., one for metro SDH transport, one for data center KR interconnect |
| VeriTime™ IEEE 1588v2 hardware TSU | Eliminates software timestamp jitter by performing packet ingress/egress time stamping in dedicated logic with <1 ns uncertainty |
| One-step & two-step transparent/boundary clock modes | Reduces PTP message latency and processing overhead by embedding correction fields directly in PTP frames or updating timestamps in hardware |
| WIS-compliant SONET/SDH framing | Permits direct integration into carrier-class optical transport systems without external mapping logic or protocol converters |
| Synchronous Ethernet (SyncE) support | Meets G.8262 EEC Option 2 spec for holdover stability and phase noise, enabling traceable frequency distribution across multi-vendor networks |
| Failover cross-connect (non-hitless) | Allows manual or triggered channel switchover between primary and backup SerDes paths for redundancy in mission-critical line cards |
Applications
| Telecom Line Card (1588 Transparent Clock) | Metro Aggregation Switch |
|---|---|
Use Scenario: 10G line card in a carrier-grade switch providing precise time distribution to downstream base stations. IC Role / Device Role / Timing Role: Acts as end-to-end IEEE 1588v2 transparent clock, measuring and correcting residence time for PTP packets at wire speed. Use Value: Achieves sub-50 ns timestamp accuracy and eliminates software-induced delay variation, meeting 3GPP LTE-A and 5G fronthaul timing requirements. |
Use Scenario: Aggregation node connecting multiple access rings using both SONET and Ethernet interfaces. IC Role / Device Role / Timing Role: Provides dual-mode SerDes: one lane in 10GBASE-W (STS-192c) for legacy SDH uplink, second in 10GBASE-R for IP/MPLS core handoff. Use Value: Enables seamless interworking between legacy TDM and modern packet infrastructure without external protocol mappers or gateways. |
| Backplane-Based Router Module | Timing-Aware Network Test Equipment |
Use Scenario: High-density router blade requiring KR backplane connectivity to fabric ASICs with deterministic latency. IC Role / Device Role / Timing Role: Implements 10GBASE-KR with auto-negotiation and training, plus embedded IEEE 1588 timestamping for control plane timing validation. Use Value: Delivers KR link establishment in <100 ms and hardware timestamping of management traffic for real-time performance monitoring. |
Use Scenario: Portable field tester verifying PTP accuracy, Y.1731 delay measurements, and SyncE jitter compliance. IC Role / Device Role / Timing Role: Functions as a calibrated timing reference with serial time-of-day output, PPS alignment, and RFC 6374 OAM DMM/DMR generation. Use Value: Supports Y.1731 one-way/two-way delay measurement with <100 ns resolution and traceable to UTC via NTP/PTP master sync. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 10G SerDes PHY applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Marvell Alaska X 88X3310 | Single-port 10G KR/XFI PHY; lacks WIS, IEEE 1588 TSU, and dual-channel independence | Targeted at enterprise switches and servers - not suitable for SONET transport or carrier-grade timing | Select when cost-sensitive 10G KR connectivity suffices without telecom timing or framing features |
| Intel Ethernet Controller X710-AT2 | PCIe-based MAC+PHY SoC; integrates host interface but no WIS or standalone 1588 TSU hardware | Designed for server NICs and virtualized edge appliances - requires host CPU for timestamp processing | Choose for x86-based platforms needing offload and PCIe integration, not for line-card PHY replacement |
Compared with Marvell 88X3310 and Intel X710-AT2, the VSC8489YJU-17 uniquely combines dual 10G SerDes lanes, hardware-accelerated IEEE 1588v2 timestamping, and full WIS compliance - making it irreplaceable in carrier-grade timing-aware line cards where deterministic latency, SONET interoperability, and sub-nanosecond time accuracy are mandatory.
Availability
VSC8489YJU-17 is available at Aetrix Electronics and suitable for telecom infrastructure, metro aggregation systems, and precision timing equipment requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial deployment.
Supply support for VSC8489YJU-17 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 - is a leader in high-reliability semiconductor solutions for aerospace, defense, communications, and data center markets, specializing in timing, security, and analog mixed-signal ICs.
The VSC8489YJU-17 belongs to Microsemi's VeriTime™ family of precision timing PHYs, engineered specifically for carrier-class network equipment requiring hardware timestamping, WIS framing, and SyncE-compliant frequency recovery.
FAQ
What is the primary function of the VSC8489YJU-17 in a telecom line card?
The VSC8489YJU-17 serves as a dual-channel 10 GbE SerDes PHY that bridges WAN/LAN/Backplane interfaces to SFP+/KR physical layers while delivering hardware-accelerated IEEE 1588v2 timestamping. In a telecom line card, the VSC8489YJU-17 enables precise time distribution as a transparent or boundary clock, supports SONET/SDH WIS framing, and ensures deterministic latency for 5G fronthaul and mobile backhaul applications.
Does the VSC8489YJU-17 support both 10GBASE-R and 10GBASE-W protocols simultaneously?
Yes, the VSC8489YJU-17 supports concurrent operation: one channel can be configured for 10GBASE-R (LAN, 64B/66B) while the other runs 10GBASE-W (WAN, WIS) mode. This dual-protocol capability allows the VSC8489YJU-17 to interconnect packet-switched and TDM-based networks on a single device, eliminating the need for external protocol conversion logic.
How does the VeriTime™ IEEE 1588 implementation in the VSC8489YJU-17 differ from software-based timestamping?
The VSC8489YJU-17 implements VeriTime™ as a dedicated hardware Time Stamp Unit (TSU) with sub-nanosecond resolution, local time counter (LTC), and serial time-of-day interface - bypassing CPU scheduling jitter and OS latency. Unlike software timestamping, the VSC8489YJU-17 performs packet-level timestamping at the PHY layer with deterministic timing, meeting ITU-T G.8275.1 profile requirements for telecom-grade PTP.
What package type and thermal characteristics apply to the VSC8489YJU-17?
The VSC8489YJU-17 uses a 324-ball fine-pitch BGA package (15 mm × 15 mm, 0.8 mm pitch) rated for –40°C to +85°C operation. Its thermal resistance (θJA) is 22.5°C/W, and it meets JEDEC JESD22-A104 for 1000-cycle thermal shock - ensuring reliability in compact, convection-cooled line cards typical of central office and outdoor cabinet deployments.
Can the VSC8489YJU-17 operate in 1 GbE mode with IEEE 1588 support?
Yes, the VSC8489YJU-17 supports 1 GbE mode with full IEEE 1588v2 timestamping, including one-step boundary clock and transparent clock operation. However, per the datasheet (Section 3.13.5), 1G mode has limited auto-negotiation support and reduced status reporting granularity compared to 10G modes - the VSC8489YJU-17 remains fully functional for timing-critical 1G applications such as legacy access node upgrades.
VSC8489YJU-17 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 196-LBGA, FCBGA
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Ethernet
- Interface:
- SPI
- Number of Circuits:
- 2
- Voltage - Supply:
- 1V, 1.2V
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -40°C ~ 110°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 196-FCBGA (15x15)
VSC8489YJU-17 FAQ
1.How can I place an order for VSC8489YJU-17 through Aetrix?
Please submit a Request for Quotation (RFQ) for VSC8489YJU-17 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 VSC8489YJU-17 reliable?
The price and inventory of VSC8489YJU-17 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSC8489YJU-17 is usually 5 days.
3.What payment methods are accepted for VSC8489YJU-17?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSC8489YJU-17 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSC8489YJU-17?
VSC8489YJU-17 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSC8489YJU-17 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 VSC8489YJU-17?
For technical support, including VSC8489YJU-17 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSC8489YJU-17 requirements.
6.How does Aetrix verify that VSC8489YJU-17 is sourced from the original manufacturer or authorized distributors?
All VSC8489YJU-17 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 VSC8489YJU-17 meets industry standards.
7.What is the process for return or replacement of VSC8489YJU-17?
All VSC8489YJU-17 units undergo pre-shipment inspection (PSI). If there is an issue with VSC8489YJU-17, 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 VSC8489YJU-17 part is unused and in its original packaging.
Return procedure for VSC8489YJU-17:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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