YT8512C - 10/100Mbps Ethernet PHY Transceiver, MII/RMII | Motorcomm
部品番号: YT8512C ✓ 生産中| 数量 | 単価 | 小計 |
|---|---|---|
| 1 | $0.36 | $0.36 |
| 10 | $0.32 | $3.20 |
| 100 | $0.29 | $29.00 |
| 500 | $0.26 | $130.00 |
| 1,000 | $0.23 | $230.00 |
| 3,000 | $0.2 | $600.00 |
YT8512C 概要
An Ethernet PHY (physical layer transceiver) is the analog/digital mixed-signal block that sits between a MAC (media access controller) and the RJ45/Magnetics front end. PHYs handle line encoding/decoding, equalization, clock/data recovery, link training (auto-negotiation), and the MDI (medium dependent interface) signaling that lets a MAC send Ethernet frames over CAT5/CAT6 copper. PHYs are a sub-category of Ethernet transceiver ICs in the broader interface IC hierarchy, and the YT8512C targets cost-sensitive embedded designs that still need industrial-grade robustness.
Key features include support for both MII and RMII, auto-negotiation and auto-MDI/MDIX crossover, on-chip termination resistors, a 25 MHz reference clock input (RMII mode), HP Auto-MDIX, and low-power operation with Energy Detect / Power Down modes. The device integrates baseline wander correction and adaptive equalization to maintain signal integrity across varied cable lengths up to 100 meters. Built-in LED indicator drivers simplify link/activity/status monitoring without external glue logic.
Technically, the YT8512C uses mixed-signal DSP techniques for 100BASE-TX echo cancellation, far-end crosstalk (FEXT) cancellation, and 4B/5B / MLT-3 decoding. Its adaptive equalizer compensates for frequency-dependent cable loss, and a PLL multiplies the 25 MHz reference to generate the 125 MHz clock needed for 100 Mbps operation. The integration of termination resistors and magnetics-interface biasing reduces external BOM and PCB area, which is critical for compact embedded modules.
Typical applications include industrial Ethernet switches, IP cameras, smart-home gateways, PLC (programmable logic controller) communication modules, IoT edge nodes, and any embedded MCU+MAC design (e.g., STM32 Ethernet, NXP i.MX RT, Linux SoMs) that needs a low-cost 10/100 Mbps copper interface. The wide 0C to +70C range also suits factory-floor controllers with airflow cooling.
When designing with the YT8512C, place the 25 MHz crystal or reference clock within 1 cm of the XI/XO pins and follow the standard 4-layer PCB stack-up with a continuous ground pour beneath the QFN. Ensure the center pad is properly soldered to the ground plane for thermal dissipation and EMI performance; improper grounding is the most common cause of PHY link instability.
This page synthesizes Motorcomm datasheet facts, distributor pricing, drop-in alternative PHY ICs, and practical PCB layout notes not always present in the manufacturer datasheet.
ドロップイン代替品: YT8512C — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
クイック比較ツール — 並列比較する代替部品を選択:
RTL8201F
✓ 在庫あり
$0.42 / 個
データシートを見る →YT8512H
📋 参考代替品（カタログ未掲載）
IP101GR
📋 参考代替品（カタログ未掲載）
IP101GA
📋 参考代替品（カタログ未掲載）
RTL8201E
📋 参考代替品（カタログ未掲載）
YT8512C 仕様
| Product Type | Ethernet PHY Transceiver (10/100 Mbps) |
| Manufacturer | Motorcomm |
| Standards Supported | 10BASE-T, 100BASE-TX |
| データレート | 10 Mbps / 100 Mbps |
| 電源電圧 | 3.3 V |
| MAC Interface | MII, RMII |
| パッケージ | QFN-32 (5x5 mm) |
| 動作温度 | 0C to +70C |
| Auto-Negotiation | Yes |
| Auto-MDI/MDIX | Yes |
| Number of Ports | 1 |
| Reference Clock | 25 MHz (RMII mode external) |
| 実装タイプ | Surface Mount |
| RoHS ステータス | Compliant |
| LED Indicators | Built-in drivers |
YT8512C ピン構成
| ピン 1 | VDDIO — I/O supply voltage (3.3V) |
| ピン 2 | VDD33 — Analog/digital core supply (3.3V) |
| ピン 3 | XI — 25 MHz crystal input / reference clock |
| ピン 4 | XO — 25 MHz crystal output |
| ピン 5 | GND — Ground |
| ピン 6 | RXP — Differential receive input (positive) |
| ピン 7 | RXN — Differential receive input (negative) |
| ピン 8 | TXP — Differential transmit output (positive) |
| ピン 9 | TXN — Differential transmit output (negative) |
| ピン 10 | AVDD — Analog supply (filtered 3.3V) |
| ピン 11 | AGND — Analog ground |
| ピン 12 | RESET — Hardware reset, active low |
| ピン 13 | MDIO — Management data I/O |
| ピン 14 | MDC — Management data clock |
| ピン 15 | TXD0 — MII/RMII transmit data bit 0 |
| ピン 16 | TXD1 — MII/RMII transmit data bit 1 |
| ピン 17 | TXD2 — MII transmit data bit 2 (MII only) |
| ピン 18 | TXD3 — MII transmit data bit 3 (MII only) |
| ピン 19 | TX_EN — Transmit enable |
| ピン 20 | TX_CLK — MII transmit clock output |
| ピン 21 | RXD0 — MII/RMII receive data bit 0 |
| ピン 22 | RXD1 — MII/RMII receive data bit 1 |
| ピン 23 | RXD2 — MII receive data bit 2 (MII only) |
| ピン 24 | RXD3 — MII receive data bit 3 (MII only) |
| ピン 25 | RX_DV — Receive data valid |
| ピン 26 | RX_CLK — MII receive clock output |
| ピン 27 | CRS — Carrier sense |
| ピン 28 | COL — Collision detected |
| ピン 29 | LED0 — LED indicator driver 0 (link/activity) |
| ピン 30 | LED1 — LED indicator driver 1 (speed/status) |
| ピン 31 | LED2 — LED indicator driver 2 (activity) |
| ピン 32 | EPAD — Exposed pad, connect to ground |
主な用途
YT8512C の用途: 6 件s: IP Cameras / Video Surveillance, Industrial Ethernet Switches, Smart Home Gateways and IoT Hubs, Programmable Logic Controller (PLC) Communication Modules, Embedded Linux System-on-Module Designs, Set-Top Boxes and Home Network Attached Storage.
IP Cameras / Video Surveillance
The YT8512C's integrated 10/100 Mbps PHY, MII/RMII MAC interface, and small QFN-32 (5x5 mm) footprint make it a strong fit for IP camera designs that need Ethernet connectivity without inflating BOM cost. The auto-MDI/MDIX feature eliminates the need for crossover cables, simplifying field installation in residential and SMB surveillance. With 4B/5B decoding, adaptive equalization, and on-chip termination resistors, the YT8512C sustains robust 100BASE-TX links over CAT5 cable runs of up to 100 meters, while its low-power operation keeps PoE PD thermal budgets manageable. Compared to higher-cost PHYs, the YT8512C delivers comparable link performance at a fraction of the unit price, which is critical for high-volume camera SKUs.
おすすめ
Industrial Ethernet Switches
For entry-level industrial Ethernet switches with up to 5-8 ports, the YT8512C provides a low-cost per-port PHY that pairs with a switch SoC over MII/RMII. The device's commercial 0C to +70C temperature range suits factory-floor enclosures with airflow cooling, and its built-in LED drivers enable per-port link/activity indication without external glue logic. The YT8512C integrates baseline wander correction and adaptive equalization to maintain signal integrity across long cable runs typical in factory automation. Designers can pair multiple YT8512C ICs with one switch controller (e.g., a Vitesse/Microsemi or Realtek switch SoC) to build cost-optimized unmanaged switches at sub-$10 port pricing.
おすすめ
Smart Home Gateways and IoT Hubs
Smart-home gateways, Zigbee-to-IP bridges, and Wi-Fi/Ethernet dual-mode IoT hubs need reliable 10/100 Mbps Ethernet to the home router without doubling the BOM cost. The YT8512C's 3.3V single-supply operation simplifies power-tree design when paired with AC/DC or PoE-PD supplies, and its auto-negotiation between 10/100 Mbps allows compatibility with older home routers. The QFN-32 footprint fits in compact gateway enclosures, and the built-in HP Auto-MDIX eliminates crossover cable frustration for end users. Embedded Linux SoMs (e.g., i.MX6ULL, AM335x) commonly use the YT8512C as the copper PHY, since the RMII interface drops directly into the SoC's MAC pins.
おすすめ
Programmable Logic Controller (PLC) Communication Modules
PLC communication modules often require isolated 10/100 Mbps Ethernet for PROFINET, EtherNet/IP, or Modbus TCP fieldbus connectivity. The YT8512C pairs naturally with industrial MCU platforms (STM32F4/F7, NXP i.MX RT) that include a MAC but require an external PHY for the copper MDI. The motorcomm datasheet confirms full 100BASE-TX compliance with adaptive equalization to handle the long shielded cable runs common on factory floors. The 5x5 mm QFN footprint fits in DIN-rail mounted PCBs where board real estate is at a premium, and low-power operation helps meet IEC 61131-2 thermal budgets without active cooling.
おすすめ
Embedded Linux System-on-Module Designs
Embedded Linux SoMs based on i.MX6/i.MX7/i.MX8M, AM335x, or Allwinner H-series SoCs require an external 10/100 PHY because the SoC typically only integrates the MAC. The YT8512C's RMII interface drops straight into these SoCs with minimal glue logic, and the 25 MHz reference clock can be sourced from the SoC's clock output or a local crystal. The QFN-32 footprint simplifies SoM layout because the device can be placed on the underside of the module without interfering with top-side RF or power components. Production cost savings versus TI DP83848 or Microchip LAN8720 are significant at volume, while link reliability remains comparable for typical CAT5 cable plants.
おすすめ
Set-Top Boxes and Home Network Attached Storage
Set-top boxes and home NAS products require a low-cost 10/100 Mbps Ethernet interface for media streaming, OTA updates, and remote management. The YT8512C's small QFN-32 footprint suits the cramped enclosures typical of consumer STBs, and its 3.3V operation simplifies power design alongside SoCs that already run on 3.3V rails. The integrated auto-negotiation feature transparently handles mixed 10/100 Mbps switch fabrics in home networks. For NAS designs, the YT8512C's low-power consumption (typically <150 mW active) is acceptable for non-gigabit entry-level products where cost per port matters most.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: YT8512C — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | YT8512H | IP101GR | IP101GA | RTL8201F | RTL8201E |
|---|---|---|---|---|---|---|
| Package | QFN-32 (5x5 mm) | QFN-32 (5x5 mm) - same | QFN-32 (5x5 mm) - same | QFN-32 (5x5 mm) - same | QFN-32 (5x5 mm) - same | QFN-32 (5x5 mm) - same |
| Brand | Motorcomm | Motorcomm | IC Plus | IC Plus | Realtek | Realtek |
| Data Rate | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps | 10/100 Mbps |
| MAC Interface | MII / RMII | MII / RMII | MII / RMII | MII / RMII | MII / RMII | MII / RMII |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Operating Temperature | 0C to +70C (commercial) | Extended grade | 0C to +70C | 0C to +70C | 0C to +70C (variants -40C to +85C) | 0C to +70C |
| Auto-MDI/MDIX | Yes | Yes | Yes | Yes | Yes | Yes |
| Approx. Unit Price (qty 1) | $0.36 USD | $0.35 - $0.40 USD | $0.40 - $0.50 USD | $0.40 - $0.50 USD | $0.55 - $0.70 USD | $0.45 - $0.55 USD |
主な差別化要因
- Smaller QFN-32 footprint at lower cost than incumbent TI DP83848 （vs TI DP83848)
- On-chip termination and Auto-MDIX reduce external BOM （vs Microchip LAN8720)
- Commercial-grade pricing without sacrificing link robustness （vs Realtek RTL8201F)
設計ノート
Place the 25 MHz crystal or external clock source within 1 cm of the XI/XO pins of the YT8512C; route the traces over a continuous ground pour and guard-band them with ground vias. The differential pair to the magnetics (TXP/TXN and RXP/RXN) must be 100 ohm differential impedance with length matching to within 2 mm; any mismatch causes common-mode noise that the adaptive equalizer may not fully correct over long cable runs.
Estimated: at 3.3V supply and typical 100BASE-TX active current of approximately 100 mA, the YT8512C dissipates roughly 0.33 W. The QFN-32 exposed pad (EPAD) must be soldered to a ground plane with at least 4 thermal vias for adequate heat spreading; without proper EPAD soldering, junction temperature can rise 30-40C above ambient and degrade long-term reliability.
Do not omit the 0.1uF and 10uF decoupling capacitors on the 3.3V supply pins; without bulk capacitance, the YT8512C's internal PLL can exhibit jitter that corrupts the MII/RMII transmit clock and causes intermittent link drops. Also, do not strap MII/RMII selection pins incorrectly at reset - an unintended MII/RMII mode mismatch between PHY and MAC results in no link-up. Always validate strap pin levels against the Motorcomm datasheet revision.
The YT8512C's MDC/MDIO bus can be pulled up to 3.3V through 1.5-10 kohm resistors; pull-ups too weak cause intermittent management register read errors during auto-negotiation. Avoid running MDIO traces parallel to the high-speed MII data bus for more than 25 mm; crossed traces should be done at 90 degrees to minimize crosstalk into the management interface.
コンプライアンス情報
RoHS compliant per JLCPCB/LCSC product page. REACH, halogen-free, and conflict minerals status not stated in the verified data; mark as unknown until Motorcomm's full material declaration is reviewed.
