DP83TC814R-Q1 - 100BASE-T1 Auto Ethernet PHY | TI
料号： DP83TC814R-Q1 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.86 | $3.86 |
| 10 | $3.47 | $34.70 |
| 100 | $3.1 | $310.00 |
| 500 | $2.79 | $1,395.00 |
| 1,000 | $2.55 | $2,550.00 |
DP83TC814R-Q1 概述
An Ethernet PHY (physical layer device) is the interface IC that converts digital MAC frames into signals transmitted over a physical medium. In the Ethernet IC hierarchy - PHY transceiver -> Ethernet controller -> network interface -> automotive E/E architecture - the PHY is the final analog stage that determines link robustness, power draw, and EMC behavior. 100BASE-T1 (formerly BroadR-Reach) transmits 100 Mbps full-duplex over a single unshielded twisted pair, halving cabling weight versus conventional 100BASE-TX.
Key features include a flexible MAC interface whose I/O supply (VDDMAC) is configurable to 1.8 V, 2.5 V, or 3.3 V, easing direct connection to a wide range of automotive microcontrollers without level shifters. The device supports full and half duplex operation with RMII media access, integrates TI's diagnostic tool kit for real-time link monitoring, and delivers low-power modes essential for network-managed ECU sleep strategies. According to the DP83TC814x-Q1 datasheet, the die family shares a common footprint strategy across speed grades.
A major engineering benefit is footprint unification: the device is pin-2-pin compatible with the DP83TG720 (1000BASE-T1) and form-factor compatible with DP83TC811 and DP83TC812, so a single PCB layout can be reused across DP83TC811, DP83TC812, DP83TC814, and DP83TG720 designs. This lets automotive Tier-1s qualify one board platform for 100 Mbps and 1 Gbps in-vehicle networking variants.
Typical applications include camera and sensor data links in ADAS systems, gateway ECUs bridging CAN and Ethernet domains, infotainment backbone nodes, and domain/zonal controller interconnects in modern vehicle networks.
When designing with this part, follow TI's reference design guidance for the single-pair MDI termination and magnetics network, and verify EMC performance on the target harness, since automotive 100BASE-T1 compliance depends heavily on layout and common-mode treatment.
This page adds value beyond the datasheet by synthesizing distributor availability, drop-in alternatives, and practical design notes in one place. Pricing shown is as of 2026-10-19.
直接替换替代料： DP83TC814R-Q1 ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： DP83TC814R-Q1 （相同外形与封装尺寸） ——差异在于 Package, Product Type, Standard Compliance, EMC Compliance, MAC Interfaces.
快速对比工具——选择替代料号进行并排对比：
DP83TC812R-Q1
✅ 直接替换📋 参考替代料（不在目录中）
DP83TC814S-Q1
✅ 直接替换✓ 有现货
$3.05 / 个
查看数据手册 →DP83TC811R-Q1
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$2.49 / 个
查看数据手册 →DP83TG720S-Q1
✅ 直接替换✓ 有现货
$3.85 / 个
查看数据手册 →DP83TC814R-Q1 规格参数
| Product Type | 100BASE-T1 Automotive Ethernet PHY |
| 数据速率 | 100 Mbps |
| Standard Compliance | IEEE 802.3bw (100BASE-T1) |
| TC10 Sleep/Wake Support | No (R version) |
| Duplex | Full, Half |
| MAC Interface Supply (VDDMAC) | 1.8 V, 2.5 V, or 3.3 V (configurable) |
| MAC Interface Type | RMII (SDR); DDR required only for 1-Gbps operation |
| 封装 | VQFN-36, 6.00 mm x 6.00 mm, wettable flank |
| 安装类型 | Surface Mount |
| AEC-Q100 Qualification | Qualified (automotive grade) |
| Pin Compatibility | Pin-2-pin with DP83TG720; form-factor compatible with DP83TC811/DP83TC812 |
| Diagnostics | Integrated diagnostic tool kit for real-time monitoring |
| Power Features | Low-power modes |
DP83TC814R-Q1 vqfn-36, 6.00 mm x 6.00 mm, wettable flank 引脚配置指南
DP83TC814R-Q1（vqfn-36, 6.00 mm x 6.00 mm, wettable flank 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： DP83TC814R-Q1.
请参阅 数据手册 以查看完整引脚配置。
典型应用
DP83TC814R-Q1 适用于 6 应用s: ADAS Camera and Sensor Links, Automotive Ethernet Gateway ECU, Infotainment Backbone Networking, Zonal and Domain Controllers, Industrial and Test Equipment Ethernet Interfaces, Battery Management and Powertrain Networking.
ADAS Camera and Sensor Links
The DP83TC814R-Q1 is widely used to move uncompressed or compressed video from ADAS camera modules to domain controllers over a single unshielded twisted pair. The 100 Mbps line rate matches typical camera bandwidth budgets, and the single-pair 100BASE-T1 standard per IEEE 802.3bw cuts cabling weight, which matters because harness mass directly affects vehicle efficiency. The AEC-Q100 qualification and wettable-flank VQFN-36 package support the automated optical inspection used in automotive assembly lines. The integrated diagnostic tool kit enables real-time monitoring of link quality during camera bring-up and end-of-line testing. Placed behind a single-pair MDI with the recommended termination network, the PHY meets automotive EMC requirements when layout follows TI reference designs; low-power modes allow camera nodes to be powered down in network sleep strategies when the R-version's lack of TC10 is compensated by gateway-controlled wake.
推荐
Automotive Ethernet Gateway ECU
In gateway ECUs that bridge CAN, LIN, and Ethernet domains, the DP83TC814R-Q1 provides 100 Mbps backbone ports with a flexible MAC interface. The configurable VDDMAC supply of 1.8 V, 2.5 V, or 3.3 V allows direct connection to automotive microcontroller MACs without external level translators, reducing BOM count in dense gateway boards that already carry dozens of interface ICs. TI's footprint unification - one PCB layout usable for DP83TC811, DP83TC812, DP83TC814, and DP83TG720 - lets gateway platforms share a single qualified board across cost and speed tiers, amortizing validation cost. Full and half duplex operation plus RMII support covers legacy MCU integrations. In this application the PHY typically runs continuously, so the device's low-power characteristics and diagnostic tool kit for real-time monitoring help manage thermal budget and fleet-level link health analytics.
推荐
Infotainment Backbone Networking
Modern infotainment architectures use 100BASE-T1 single-pair Ethernet as the backbone between head units, amplifiers, displays, and connectivity modules. The DP83TC814R-Q1 suits these links because its 100 Mbps full-duplex rate comfortably carries compressed audio/video streams, and its automotive qualification addresses the elevated cabin temperatures infotainment nodes experience. The 36-pin VQFN 6.00 mm x 6.00 mm wettable-flank package fits the dense multilayer boards typical of head units, and the flexible MAC I/O voltage connects cleanly to SoC media interfaces running at 1.8 V or 3.3 V. The diagnostic tool kit assists in certifying EMC behavior of the MDI on production harnesses, a critical factor for consumer-experienced audio dropouts. Because a single PCB layout is reusable across the DP83TC811/812/814/DP83TG720 family, infotainment platforms can offer connectivity-tier variants with one hardware design.
推荐
Zonal and Domain Controllers
Zonal controller architectures concentrate vehicle wiring into local nodes linked by Ethernet backbones. The DP83TC814R-Q1 provides the 100 Mbps uplink from a zone to the central compute node over a single twisted pair, satisfying IEEE 802.3bw and AEC-Q100 requirements. Its low-power modes align with the sleep/wake power management of zonal nodes, and its pin-2-pin compatibility with DP83TG720 means a zonal controller PCB can be qualified once and populated with either a 100 Mbps or 1 Gbps PHY depending on the zone's bandwidth class - TI explicitly documents that one layout serves DP83TC811, DP83TC812, DP83TC814, and DP83TG720. The VDDMAC flexibility (1.8 V, 2.5 V, 3.3 V) lets the same controller board host MCUs from different vendors without interface rework. Real-time diagnostics via the integrated tool kit support in-service network monitoring demanded by software-defined-vehicle platforms.
推荐
Industrial and Test Equipment Ethernet Interfaces
Although automotive-qualified, the DP83TC814R-Q1 is also practical in industrial single-pair Ethernet links and in test fixtures that emulate automotive networks. Test houses validating 100BASE-T1 compliance use the PHY's register-level diagnostic tool kit for real-time monitoring of signal quality during EMC chamber runs and cable-harness stress tests. The wide MAC interface voltage range (1.8 V, 2.5 V, 3.3 V on VDDMAC) simplifies integration with FPGA and MCU evaluation platforms that use different I/O banks. The shared footprint with DP83TC811, DP83TC812, and DP83TG720 lets test fixture vendors build one carrier board covering 100 Mbps and 1 Gbps device-under-test sockets, reducing fixture inventory. Half and full duplex support plus RMII compatibility eases connection to general-purpose microcontroller ecosystems used in instrumentation.
推荐
Battery Management and Powertrain Networking
Powertrain and battery management ECUs increasingly adopt 100BASE-T1 for deterministic, low-latency communication between cell supervision circuits, control nodes, and vehicle gateways. The DP83TC814R-Q1 fits these environments: AEC-Q100 qualification addresses harsh thermal and vibration conditions, and the low-power design suits ECUs with strict quiescent-draw budgets when the vehicle is parked - although the R version lacks TC10, gateway-mediated wake strategies remain viable. The single twisted-pair link reduces connector pin count and harness cost in battery packs where routing space is limited. The configurable VDDMAC (1.8 V, 2.5 V, 3.3 V) matches the I/O domains of typical BMS microcontrollers, and the wettable-flank VQFN-36 package supports the inspection standards of high-reliability powertrain assembly lines. Link diagnostics support predictive maintenance analytics on the communication channel itself.
推荐
推荐产品汇总
工程参考数据： DP83TC814R-Q1 ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | DP83TC812R-Q1 | DP83TC814S-Q1 | DP83TC811R-Q1 | DP83TG720S-Q1 |
|---|---|---|---|---|---|
| Package | VQFN-36, 6.00 mm x 6.00 mm, wettable flank | Same footprint (shared PCB layout per TI) | VQFN-36, 6.00 mm x 6.00 mm - same | Form-factor compatible per TI | Pin-2-pin compatible, same package |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Data Rate | 100 Mbps (100BASE-T1) | 100 Mbps | 100 Mbps | 100 Mbps | 1000 Mbps (1000BASE-T1) |
| Standard | IEEE 802.3bw | IEEE 802.3bw | IEEE 802.3bw | IEEE 802.3bw | IEEE 802.3bp (1000BASE-T1) |
| AEC-Q100 | Qualified | Qualified (-Q1 suffix) | Qualified | Qualified (-Q1 suffix) | Qualified (-Q1 suffix) |
关键差异点
- Single-PCB-family upgrade path to 1 Gbps （对比 DP83TG720S-Q1)
- Configurable MAC interface voltage （对比 DP83TC811R-Q1)
- TC10 omitted for cost-optimized links （对比 DP83TC814S-Q1)
设计说明
Because TI documents that one PCB layout is usable for DP83TC811, DP83TC812, DP83TC814, and DP83TG720, design the MDI termination and magnetics network per the DP83TC814x-Q1 reference schematic so a 100 Mbps board can later accept the 1 Gbps DP83TG720 without relayout. Keep the single-pair MDI traces impedance-controlled and short, place the AC coupling/termination network close to the pins, and reserve the footprint populated per the chosen variant's BOM. The wettable-flank VQFN-36 package is chosen specifically for reliable solder-joint inspection on automotive AOI lines.
Configure VDDMAC (pin 22) to match the MAC I/O bank voltage of the host microcontroller: 1.8 V, 2.5 V, or 3.3 V. This avoids external level translators, but ensure the supply rail is well decoupled (bulk plus 0.1 uF ceramic at the pin). RMII timing at 100 Mbps is single-data-rate - data is sampled on the falling clock edge; DDR clocking is only needed for 1 Gbps operation on the pin-compatible DP83TG720, so verify reference-clock routing and loading if planning a shared layout for both speed classes.
Do not confuse the R and S variants: the DP83TC814R-Q1 has no TC10 sleep/wake support, so designs relying on Open Alliance TC10 wake sequences must use the DP83TC814S-Q1 or handle wake through the gateway. Also confirm software compatibility when reusing drivers - TI E2E threads note that code written for DP83TC812R-Q1 needs verification against the DP83TC814R-Q1 register set. Use TI's IBIS model for RMII signal-integrity simulation before finalizing trace lengths.
合规信息
AEC-Q100 qualification confirmed by TI datasheet. RoHS/REACH/lead-free status not stated in the provided web data - see TI product page for the official quality dossier.
