VSC8641XKO - Gigabit Ethernet PHY | Microchip | 100-LQFP
MPN： VSC8641XKO ✓ 啟用中VSC8641XKO 概覽
A Gigabit Ethernet PHY is the physical-layer component that converts digital Ethernet data into electrical signaling for a twisted-pair cable and reconstructs incoming signaling into data for the network controller or communications processor. Within the Ethernet hierarchy, the VSC8641XKO sits between a MAC or switch fabric and the physical network medium. It is therefore relevant to industrial Ethernet equipment, network appliances, access systems, and embedded communications platforms that require a 1 GbE copper-network interface.
The VSC8641 family is described by Vitesse Semiconductor as being designed for high-performance, low-power, and low-cost Gigabit Ethernet PHYs. The family combines a highly integrated GbE PHY with support for both GMII and RGMII connectivity, allowing the host interface to be selected according to processor pin availability and clocking requirements. The exact transceiver thresholds, internal reference requirements, latency, cable reach, and operating-temperature limits should be confirmed against the VSC8641 manufacturer datasheet before a circuit is released.
For implementation, the VSC8641XKO requires a carefully designed Ethernet magnetics path, controlled clocking, suitable supply decoupling, and a PCB layout that preserves the high-speed differential signals. The 100-LQFP package provides many power, ground, analog, and digital interface connections, so its pin assignment and exposed routing requirements must be followed directly from the manufacturer pin-description table. Commercial availability and lifecycle decisions should also be reconfirmed with Microchip.
Typical applications include industrial routers, network-interface controllers, Ethernet switches, embedded gateways, set-top equipment, and communications modules requiring a compact 1 GbE PHY. Because the VSC8641XKO is a dedicated interface device rather than a general-purpose processor, its value lies in reducing PHY implementation effort while preserving the flexibility of GMII or RGMII attachment to a host controller.
This product overview combines the exact orderable MPN, package information, supply information, interface description, source links, and engineering guidance to support initial design evaluation. Use the Request a Quote form on this page for current commercial conditions, and verify lifecycle status, pin functions, electrical limits, and recommended magnetics against the current manufacturer documentation before production release.
直接替換替代品，適用於 VSC8641XKO — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品VSC8641XKO 規格
| Product Type | Gigabit Ethernet PHY transceiver |
| Number of Drivers/Receivers | 1/1 |
| Transceiver Configuration | 1/1 transceiver |
| 資料速率 | 1 Gb/s |
| 供應電壓 | 2.5 V, 3.3 V |
| Host Interface | GMII, RGMII |
| 封裝 | 100-LQFP |
| 安裝類型 | Surface mount |
| Packaging | Tray |
| Ethernet Standard | Gigabit Ethernet |
| Network Medium | Copper Ethernet |
| Lead-Free Status | Lead-free |
| RoHS 狀態 | PB-free |
| 腳位數 | 100 pins |
VSC8641XKO 100-lqfp 腳位配置指南
VSC8641XKO（100-lqfp 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： VSC8641XKO.
請參閱 資料表 以查看完整腳位配置。
典型應用
VSC8641XKO 適用於 6 應用s: Industrial Ethernet Routers, Embedded Network Gateways, Network Interface Controller Cards, Ethernet Switch Equipment, Set-Top and Communications Equipment, Network Monitoring and Control Systems.
Industrial Ethernet Routers
The VSC8641XKO fits an industrial router that needs a dedicated 1 Gb/s copper Ethernet port alongside a host processor or switching fabric. Its 2.5 V and 3.3 V supply operation, GMII or RGMII connectivity, and 100-LQFP package support a structured implementation in networking equipment. The PHY performs the physical signaling required by the copper medium while the host controller manages packet processing, routing, management, and protocol services. Designers should follow the manufacturer reference layout for differential pairs, supply decoupling, grounding, and the magnetic network. Cable reach, temperature range, and recovery behavior should be confirmed in the datasheet before selecting it for a harsh industrial enclosure.
推薦
Embedded Network Gateways
The VSC8641XKO is appropriate for an embedded gateway that bridges a communications processor to a 1 GbE copper network. RGMII can reduce host-side signal count compared with GMII, while GMII remains available for controllers that favor a wide parallel interface. The 1/1 transceiver arrangement and 1 Gb/s rate suit a dedicated WAN or service port. Because this is a lead-free, PB-free 100-LQFP device in tray packaging, procurement should also account for the required quantity and manufacturing cadence. Confirm the exact temperature grade, PHY registers, clock source, and reference magnetics before committing the design to production.
推薦
Network Interface Controller Cards
The VSC8641XKO can serve as the physical-layer device on a dedicated Ethernet interface card where a host ASIC or FPGA uses GMII or RGMII. Integrating a standalone PHY gives the host controller freedom to handle framing, checksums, queues, and protocol processing while the VSC8641 handles the copper Ethernet physical layer. The 100-LQFP footprint requires careful fanout and multilayer routing, especially for clock and differential pairs. Use the manufacturer reference schematic and layout as the baseline, validate magnetics and impedance, and confirm cable reach and BER-related performance for the intended network environment before production.
推薦
Ethernet Switch Equipment
The VSC8641XKO can be paired with a switching ASIC to implement a copper Gigabit Ethernet port in an access switch or communications platform. Its GMII or RGMII interface allows the PHY to operate alongside packet-processing silicon while the 1 Gb/s line rate supports standard Gigabit Ethernet links. The device is a useful building block rather than a complete switch, so switch-specific functions remain external. Layout engineers should preserve continuous return paths, keep sensitive PHY nodes compact, and follow the prescribed magnetics and terminations. The operating-temperature grade and lifecycle commitment should be confirmed before using the part in managed or outdoor network equipment.
推薦
Set-Top and Communications Equipment
The VSC8641XKO supports a 1 Gb/s copper network connection in set-top boxes, media endpoints, and communications appliances that must bridge high-bandwidth local traffic to a home, campus, or service-provider network. The PHY’s 2.5 V and 3.3 V supply rails and selectable GMII or RGMII host connectivity align with many embedded network processors. Designers should account for the 100-LQFP footprint and thermal layout while keeping the Ethernet channel within manufacturer layout guidance. Verify the supported physical layer standard, auto-negotiation behavior, fault handling, and cable specifications against the current VSC8641 datasheet for each product variant.
推薦
Network Monitoring and Control Systems
The VSC8641XKO can provide a high-speed copper uplink for network monitoring appliances, control systems, and industrial data concentrators that must collect traffic from a 1 GbE segment. A dedicated PHY allows the host processor to focus on monitoring, filtering, timestamping, and control functions rather than driving copper signaling directly. GMII can provide a wide parallel path for FPGA-based analyzers, while RGMII can suit a network processor with fewer host-side pins. The design must use an approved magnetic and termination network, follow high-speed layout guidance, and verify operating-temperature requirements for the target cabinet. Current lifecycle and supply conditions should be confirmed with Microchip before production commitment.
推薦
推薦產品摘要
工程參考資料，適用於 VSC8641XKO — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Brand | Microchip Technology |
| Package | 100-LQFP |
| Product Type | Gigabit Ethernet PHY transceiver |
| Number of Drivers/Receivers | 1/1 |
| Data Rate | 1 Gb/s |
| Supply Voltage | 2.5 V, 3.3 V |
| Host Interface | GMII, RGMII |
| Packaging | Tray |
主要差異化特點
- Single-port Gigabit Ethernet integration (對比LAN8710A-EZC)
- Choice of parallel or reduced-width host connectivity (對比LAN8742-CZ-TR)
- High-speed PHY option with a 100-LQFP footprint (對比DP83867IRRGZR)
- RGMII support can simplify host-side routing (對比KSZ9897RTXI)
設計說明
Use the VSC8641 manufacturer reference layout as the baseline for the 100-LQFP footprint and Ethernet channel. Place the PHY close to its network transformer and keep the differential and clock routing short. Preserve continuous ground and return paths, observe the specified pair geometry, and avoid introducing stubs or test structures into the high-speed channel. Confirm every footprint dimension against the current package drawing rather than scaling the package outline from an image.
Follow the exact supply, decoupling, and sequencing requirements in the VSC8641 manufacturer datasheet for the 2.5 V and 3.3 V rails. Place the prescribed capacitor network at the associated power pins and connect the exposed or assigned ground pins according to the package drawing. Validate the assembled board for adequate ripple margin at the PHY and keep switching-regulator layout away from sensitive analog and reference nodes.
Treat the GMII or RGMII interface as a timing-sensitive digital channel. Use the manufacturer-recommended host clock source, maintain the documented trace impedance, and match trace lengths where the interface requires it. Avoid unnecessary vias, provide adequate return-path continuity, and keep clock routing separated from noisy power-converter and Ethernet magnetics areas. Run signal-integrity and link-margin checks with the selected magnetics and production PCB stack-up.
Do not treat a family-number equivalent in another package as a drop-in replacement for the 100-LQFP VSC8641XKO. The documented VSC8211XVW and VSC8501XML equivalents use different packages, so adopting them requires a PCB change or adapter and full electrical revalidation. For a true alternate, verify physical pin mapping, host-interface behavior, supplies, clocking, media network, firmware or register dependencies, and environmental qualification before substitution.
合規資訊
The exact MPN is identified as PB-free and lead-free in the verified component listing. RoHS is treated as compliant from the PB-free listing indication; REACH, AEC-Q100, halogen-free status, and conflict-minerals status are not established.
