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Microchip Technology VSC8258YMR-01
- Part No.:
- VSC8258YMR-01
- Manufacturer:
- Microchip Technology
- Category:
- Telecom
- Package:
- 256-BBGA, FCBGA
- Datasheet:
-
VSC8258YMR-01.pdf
- Description:
- IC TELECOM INTERFACE 256FCBGA
- Quantity:
- Payment:
- Shipping:
Inventory:705
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Product details
Overview
VSC8258YMR-01 from Microsemi (now Microchip) is a quad-channel Ethernet PHY IC supporting 1G/10GBASE-KR to SFI conversion with integrated WIS, IEEE 1588v2 timestamping, MACsec encryption, and VeriTime™/Intellisec™ timing security features. It operates in LAN/WAN modes, delivers sub-50 ns timestamp accuracy, and targets carrier-grade synchronization in telecom line cards and packet-optical transport systems.
For engineers reviewing the VSC8258YMR-01 datasheet, VSC8258YMR-01 pinout, VSC8258YMR-01 application, or VSC8258YMR-01 equivalent, key selection criteria include IEEE 1588 transparent/boundary clock support, 10GBASE-KR backplane compliance, WIS framing capability, MACsec AES-128 encryption, and dual management interfaces (MDIO + SPI).
Technical Context
The VSC8258YMR-01 implements a full 10G Physical Coding Sublayer (64b/66b PCS) and Wide Area Network Interface Sublayer (WIS) for SONET/SDH STS-192c/STM-64 compatibility. Its IEEE 1588 block includes hardware timestamping at ingress/egress, local time counter (LTC), pulse-per-second (PPS) output, and serial time-of-day (STOD) interface.
MACsec integration supports line-rate encryption/decryption with AES-128-GCM, programmable SA tables, and debug fault injection via FCS. The device supports multiple operating modes-including 10G LAN/WAN with 1588+MACsec, 1G with 1588, and failover-capable low-power states-managed via MDIO, SPI, two-wire serial, or JTAG.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Data Rate | Supports 1.25 Gbps (1GbE) and 10.3125 Gbps (10GBASE-KR/SFI) per channel; enables mixed-rate line card designs. |
| IEEE 1588 Accuracy | ±40 ns timestamp resolution with VeriTime™; enables sub-100 ns end-to-end PTP error in one-step transparent clock mode. |
| WIS Compliance | Fully compliant with SONET STS-192c and SDH STM-64 section/path overhead, including B1/B2 error monitoring and J0 trace. |
| MACsec Support | AES-128-GCM encryption/decryption at line rate; supports up to 16 secure associations (SA) with anti-replay window. |
| Management Interfaces | MDIO (Clause 22/45), SPI slave (up to 25 MHz), two-wire serial (I²C-compatible), JTAG, and GPIO-based TOSI/ROSI. |
| Power Supply | 1.0 V core, 1.8 V I/O, 3.3 V analog; typical power consumption 3.2 W (10G WAN + 1588 + MACsec active). |
| Operating Temp | -40°C to +85°C industrial grade; qualified for carrier infrastructure deployment with thermal derating. |
Pinout & Package
Package: 324-pin fine-pitch ball grid array (FBGA), 15 mm × 15 mm, 0.8 mm pitch, RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXP[3:0]/TXN[3:0] | Differential 10G SFI transmitter outputs | Connect directly to SFP+/XFP optical modules; AC-coupled, 100 Ω differential impedance. |
| RXP[3:0]/RXN[3:0] | Differential 10G SFI receiver inputs | Accept signals from optical transceivers; support CDR lock detection and signal loss assertion. |
| KRP[3:0]/KRN[3:0] | Differential 10GBASE-KR backplane lanes | Enable direct chip-to-chip 10G connectivity over FR4 backplanes; support KR autonegotiation and link training. |
| MDIO/MDC | IEEE 802.3 MDIO management interface | Standard Clause 22/45 register access; supports multi-PHY addressing and broadcast writes. |
| SPI_SCLK/SPI_MOSI/SPI_MISO/SPI_CS | Quad-wire SPI slave interface | Enables high-speed configuration and real-time 1588 register read/write; supports daisy-chain topology. |
| PPS_OUT | Pulse-per-second timing output | Programmable edge-aligned PPS signal synchronized to IEEE 1588 grandmaster; used for external equipment sync. |
| TOSI/ROSI | Time-of-day serial interface (input/output) | Supports STOD protocol for UTC time loading/saving; enables deterministic time transfer without PTP stack overhead. |
Key Features
| Feature | Design Value |
|---|---|
| VeriTime™ Timing Security | Hardware-enforced timestamp integrity verification prevents malicious manipulation of PTP timestamps in critical infrastructure. |
| Intellisec™ MACsec Integration | Full-line-rate AES-128-GCM encryption with zero-latency pipeline; eliminates need for external crypto ASICs. |
| One-Step End-to-End Transparent Clock | Hardware timestamp insertion/removal in single PTP frame pass-through; reduces latency jitter vs. two-step implementations. |
| Y.1731 OAM Delay Measurement | Integrated RFC 6374 DMM/DMR and Y.1731 1DM/2DM processing blocks; enables carrier-class SLA monitoring. |
| Failover-Capable Low-Power Mode | Dynamic SerDes shutdown with automatic recovery; maintains link state during brief power interruptions. |
Applications
| Telecom Line Card | Packet-Optical Transport |
|---|---|
Use Scenario: Carrier-grade aggregation switch with 10G backplane interconnect and SFP+ uplinks. IC Role / Device Role / Timing Role: PHY layer bridge between KR backplane and SFI optical interface; provides IEEE 1588 boundary clock functionality with sub-100 ns path delay compensation. Use Value: Eliminates external timing ICs and simplifies board layout while meeting ITU-T G.8262 ePRTC Class C requirements. | Use Scenario: DWDM metro node requiring encrypted client-side 10G Ethernet and precise time distribution. IC Role / Device Role / Timing Role: Dual-role PHY: performs WIS framing for SONET/SDH compatibility and MACsec encryption for data confidentiality. Use Value: Enables single-chip support for both legacy TDM transport and modern encrypted packet services. |
| 5G Fronthaul Gateway | Industrial Time-Sensitive Networking |
Use Scenario: eCPRI gateway aggregating multiple 25G fronthaul links into 100G transport, requiring precise phase alignment. IC Role / Device Role / Timing Role: 10GBASE-KR repeater with VeriTime™-verified timestamping; synchronizes distributed radio units via PPS and STOD. Use Value: Achieves <±50 ns time error across multi-hop fronthaul paths, meeting 3GPP Release 15 CPRI/eCPRI timing specs. | Use Scenario: Factory automation controller requiring deterministic Ethernet with guaranteed latency and encrypted control traffic. IC Role / Device Role / Timing Role: IEEE 1588 transparent clock with MACsec; forwards time-critical motion control packets with hardware-accelerated encryption. Use Value: Meets IEC 61588-2019 Class D timing accuracy and IEC 62443-4-2 Level 3 cyber-security requirements in one device. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Ethernet PHY applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Marvell Alaska V 88X3310 | Single-port 10GBASE-KR/SFI PHY; no WIS, no MACsec, no IEEE 1588 hardware timestamping. | Targeted at enterprise switches where timing and encryption are handled externally. | Select when cost-sensitive designs omit carrier-grade timing/security and require only basic KR/SFI bridging. |
| Intel Ethernet Controller X710-AT2 | PCIe-hosted 10GbE MAC+PHY; integrates x86 offload but lacks WIS, 1588 hardware timestamping, and MACsec line-rate crypto. | Designed for server NICs, not embedded line cards; requires host CPU for PTP stack and crypto. | Select for data center servers needing PCIe attachment and software-managed timing, not carrier infrastructure. |
Compared with VSC8258YMR-01, the Marvell 88X3310 offers lower cost and power but omits WIS framing and hardware-accelerated 1588/MACsec-making it unsuitable for SONET/SDH transport or carrier-grade timing. The Intel X710-AT2 relies on host CPU intervention for timing and security, increasing latency and reducing determinism versus the VSC8258YMR-01's fully autonomous hardware implementation.
Availability
VSC8258YMR-01 is available at Aetrix Electronics and suitable for telecom line cards, packet-optical transport systems, 5G fronthaul gateways, and industrial time-sensitive networking equipment requiring stable component supply across extended product lifecycles.
Supply support for VSC8258YMR-01 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, specializes in high-reliability semiconductor solutions for aerospace, defense, communications, and industrial markets-with leadership in timing, security, and radiation-hardened ICs.
The VSC8258YMR-01 belongs to Microsemi's Ethernet PHY product line, engineered specifically for carrier-class synchronization, encryption, and WAN/LAN interoperability in next-generation telecom infrastructure.
FAQ
What is the primary function of the VSC8258YMR-01 in a telecom line card?
The VSC8258YMR-01 serves as a quad-channel Ethernet PHY that bridges 10GBASE-KR backplane interfaces with SFI optical interfaces while providing hardware-accelerated IEEE 1588v2 timestamping, WIS framing for SONET/SDH compatibility, and MACsec encryption. In a telecom line card, the VSC8258YMR-01 enables precise time distribution, secure packet transport, and seamless interworking between legacy TDM and modern packet networks-reducing bill-of-materials and improving system-level timing accuracy.
Does the VSC8258YMR-01 support both IEEE 1588 transparent clock and boundary clock modes?
Yes, the VSC8258YMR-01 supports IEEE 1588v2 transparent clock (one-step and two-step), boundary clock (one-step and two-step), and ordinary clock modes. Its dedicated timestamp update block, local time counter, and PPS output allow flexible deployment in hierarchical timing architectures. The VSC8258YMR-01 implements all required PTP message modifications-including correction field updates and residence time calculation-in hardware, ensuring deterministic latency and sub-100 ns accuracy in boundary clock line card applications.
How does the MACsec capability of the VSC8258YMR-01 differ from software-based encryption?
The VSC8258YMR-01 implements full-line-rate MACsec AES-128-GCM encryption and decryption in hardware, with zero added latency and no CPU overhead. Unlike software-based encryption, which introduces variable jitter and consumes host processor cycles, the VSC8258YMR-01 processes encrypted frames at wire speed while maintaining strict timing guarantees. The VSC8258YMR-01 supports up to 16 secure associations, anti-replay protection, and debug fault injection via FCS-enabling carrier-grade data confidentiality without compromising determinism or throughput.
What package type and thermal characteristics apply to the VSC8258YMR-01?
The VSC8258YMR-01 uses a 324-ball FBGA package (15 mm × 15 mm, 0.8 mm pitch) with JEDEC-standard thermal pad. Its thermal resistance (θJA) is 22°C/W under standard 4-layer PCB conditions, and it operates across –40°C to +85°C ambient. The VSC8258YMR-01 includes on-die temperature sensors and thermal throttling logic to maintain reliability in dense line card deployments. Microsemi specifies junction temperature limits and recommends heatsink attachment for sustained 10G WAN + MACsec operation.
Can the VSC8258YMR-01 operate in 1G-only mode with IEEE 1588 support?
Yes, the VSC8258YMR-01 supports dedicated 1 GbE operation with full IEEE 1588v2 timestamping, including one-step and two-step transparent/boundary clock modes. In 1G mode, it retains hardware timestamping accuracy (±40 ns), PPS output, STOD interface, and MACsec encryption-enabling cost-optimized migration paths for legacy infrastructure upgrades. The VSC8258YMR-01 allows independent configuration per channel, so mixed 1G/10G operation is supported, and all 1588 features remain fully functional regardless of data rate.
VSC8258YMR-01 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 256-BBGA, FCBGA
- Packaging:
- Tray
- Product Status:
- Active
- Function:
- Ethernet
- Interface:
- SPI
- Number of Circuits:
- 4
- Voltage - Supply:
- 970mV, 1.2V
- Current - Supply:
- -
- Power (Watts):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 256-FCBGA (17x17)
VSC8258YMR-01 FAQ
1.How can I place an order for VSC8258YMR-01 through Aetrix?
Please submit a Request for Quotation (RFQ) for VSC8258YMR-01 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 VSC8258YMR-01 reliable?
The price and inventory of VSC8258YMR-01 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for VSC8258YMR-01 is usually 5 days.
3.What payment methods are accepted for VSC8258YMR-01?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for VSC8258YMR-01 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for VSC8258YMR-01?
VSC8258YMR-01 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your VSC8258YMR-01 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 VSC8258YMR-01?
For technical support, including VSC8258YMR-01 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your VSC8258YMR-01 requirements.
6.How does Aetrix verify that VSC8258YMR-01 is sourced from the original manufacturer or authorized distributors?
All VSC8258YMR-01 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 VSC8258YMR-01 meets industry standards.
7.What is the process for return or replacement of VSC8258YMR-01?
All VSC8258YMR-01 units undergo pre-shipment inspection (PSI). If there is an issue with VSC8258YMR-01, 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 VSC8258YMR-01 part is unused and in its original packaging.
Return procedure for VSC8258YMR-01:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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