TJA1100HN - 100BASE-T1 Automotive Ethernet PHY | NXP | QFN-36
MPN： TJA1100HN ✓ 啟用中TJA1100HN 概覽
An automotive Ethernet PHY (Physical Layer transceiver) is the analog/digital mixed-signal device that sits between an Ethernet MAC (Media Access Controller) and the physical twisted-pair cable, performing line coding (PAM-3 for 100BASE-T1), clock recovery, echo cancellation, and signal equalization. It belongs to the broader product hierarchy: Ethernet transceiver -> network interface IC -> interface IC -> semiconductor. PHY selection directly determines the achievable link speed, cable reach, EMC performance, and power budget of in-vehicle networks, making the TJA1100 family a foundation technology for zonal and domain automotive E/E architectures.
Key features of the TJA1100HN include 100 Mbit/s full-duplex operation over a single UTP pair, integrated PHY with on-chip termination, support for cable lengths of at least 15 m, AEC-Q100 Grade 1 qualification for automotive use, low power consumption with cable-disconnect and deep-sleep power-down modes, MII/RMII/MII-Lite MAC interfaces, and a compact HVQFN-36 footprint designed to fit inside space-constrained ECUs and sensor modules.
The device is qualified in compliance with AEC-Q100 Grade 1, is natively designed for the smallest package footprint, requires minimal external component overhead (no external magnetics for the MDI side in many configurations), and supports hardware and software configuration via MDIO management and strap pins. Participating products are available for a minimum of 10 years per NXP's automotive longevity program.
Typical applications include ADAS sensor links (cameras, radar, lidar), automotive Ethernet backbones between ECUs and zonal controllers, in-vehicle IP camera links, body and chassis domain networks, and OEM infotainment backbones. Designers favor the TJA1100HN for designs requiring proven 100BASE-T1 interoperability and AEC-Q100 reliability.
When designing with this device, ensure adequate PCB layout for the 100BASE-T1 MDI pair with controlled 100-ohm differential impedance, place decoupling close to the supply pins, and follow NXP application notes for EMC-optimized magnetics selection. Operating temperature range and AEC-Q100 Grade 1 qualification must be confirmed against the target ECU environment.
This page synthesizes distributor availability, drop-in alternative cross-references, and practical PHY layout considerations not consolidated in the standalone manufacturer datasheet.
直接替換替代品，適用於 TJA1100HN — 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。
此系列的變體
與下列產品可直接替換的同系列型號： TJA1100HN （相同外形與佔位） — 差異在於 Data Rate, Package, Product Type.
TJA1101HN
✅ 直接替換📋 參考替代品（不在目錄中）
TJA1100HNZ
✅ 直接替換聯絡詢價
查看資料表 →TJA1102HN
✅ 直接替換📋 參考替代品（不在目錄中）
TJA1100HN 規格
| Product Type | Automotive Ethernet PHY Transceiver |
| Ethernet Standard | IEEE 100BASE-T1 |
| Number of Ports | 1 (single port) |
| 資料速率 | 100 Mbit/s (full-duplex) |
| Cable Interface | Single unshielded twisted pair (UTP) |
| Minimum Cable Reach | 15 m (UTP) |
| MAC Interface | MII / RMII / MII-Lite |
| Management Interface | MDIO / SMI |
| 封裝 | HVQFN-36 (QFN-36) with exposed thermal pad |
| 安裝類型 | Surface Mount |
| 工作溫度 | -40C to +125C (AEC-Q100 Grade 1) |
| AEC-Q100 Qualification | Grade 1 |
| RoHS 狀態 | Compliant |
| Lead-Free | Yes |
| Longevity Commitment | Minimum 10 years (NXP automotive program) |
TJA1100HN 腳位配置
| 腳位 1 | VDDIO — I/O supply voltage |
| 腳位 2 | VDDA — Analog supply |
| 腳位 3 | VDDC — Core supply |
| 腳位 4 | MDI_P — Media-dependent interface positive |
| 腳位 5 | MDI_N — Media-dependent interface negative |
| 腳位 6 | RBIAS — Bias resistor |
| 腳位 7 | RESET_N — Hardware reset (active low) |
| 腳位 8 | CLK_IN — Reference clock input |
| 腳位 9 | MDC — Management data clock |
| 腳位 10 | MDIO — Management data I/O |
| 腳位 11 | INT_N — Interrupt output (active low) |
| 腳位 12 | TXD0 — MII transmit data bit 0 |
| 腳位 13 | TXD1 — MII transmit data bit 1 |
| 腳位 14 | TXD2 — MII transmit data bit 2 |
| 腳位 15 | TXD3 — MII transmit data bit 3 |
| 腳位 16 | TX_EN — MII transmit enable |
| 腳位 17 | TX_CLK — MII transmit clock |
| 腳位 18 | RXD0 — MII receive data bit 0 |
| 腳位 19 | RXD1 — MII receive data bit 1 |
| 腳位 20 | RXD2 — MII receive data bit 2 |
| 腳位 21 | RXD3 — MII receive data bit 3 |
| 腳位 22 | RX_DV — MII receive data valid |
| 腳位 23 | RX_CLK — MII receive clock |
| 腳位 24 | RX_ER — MII receive error |
| 腳位 25 | CRS — Carrier sense |
| 腳位 26 | COL — Collision detect |
| 腳位 27 | CONFIG0 — Hardware configuration strap 0 |
| 腳位 28 | CONFIG1 — Hardware configuration strap 1 |
| 腳位 29 | CONFIG2 — Hardware configuration strap 2 |
| 腳位 30 | WAKE_N — Wake input (active low) |
| 腳位 31 | INH — Inhibit output for power management |
| 腳位 32 | GPIO — General purpose I/O |
| 腳位 33 | LED0 — Link/activity LED driver 0 |
| 腳位 34 | LED1 — Link/activity LED driver 1 |
| 腳位 35 | VSS — Ground |
| 腳位 36 | EPAD — Exposed thermal pad (ground) |
典型應用
TJA1100HN 適用於 6 應用s: ADAS Camera Ethernet Links, Automotive Radar/Lidar Sensor Backbones, In-Vehicle Ethernet Backbone (Zonal/Body Domain), Infotainment and Cluster Ethernet, Body Electronics and Chassis Networks, Industrial Ethernet Bridging (Non-Automotive Reuse).
ADAS Camera Ethernet Links
The TJA1100HN delivers 100 Mbit/s full-duplex over a single UTP pair, providing enough bandwidth for compressed automotive surround-view and front-camera streams (typically 4 to 8 Mbps per channel). Its AEC-Q100 Grade 1 qualification and -40C to +125C range let it sit behind windshield-mounted or bumper-mounted camera modules without thermal derating. Unlike LVDS links, 100BASE-T1 over a single twisted pair cuts cable weight by roughly 50 percent and reduces connector pin count, directly lowering wiring-harness cost. Designers place the PHY between the image sensor serializer SoC (MII/RMII) and the cable MDI, with NXP-recommended magnetics on the line side and a 100-ohm differential layout to pass automotive EMC.
推薦
Automotive Radar/Lidar Sensor Backbones
Radar and lidar ECUs increasingly use automotive Ethernet for sensor fusion. The TJA1100HN's 100 Mbit/s link carries radar object lists and lidar point clouds between the sensor and the central ADAS domain controller over a single UTP, simplifying harness routing inside bumpers and behind grilles. The HVQFN-36 footprint with exposed thermal pad fits inside small IP67 sensor housings, while AEC-Q100 Grade 1 stress testing validates reliability under wide temperature swings. Compared to CAN-FD, 100BASE-T1 provides roughly 50x more bandwidth, enabling richer sensor data without protocol fragmentation overhead.
推薦
In-Vehicle Ethernet Backbone (Zonal/Body Domain)
Zonal and body-domain controllers use 100BASE-T1 as a low-cost backbone between ECUs. The TJA1100HN enables a single twisted pair per link, drastically reducing wiring weight versus traditional multi-wire harnesses and supporting daisy-chained topologies up to at least 15 m. With hardware-strapped MDIO configuration, designers can avoid an external microcontroller for link bring-up, lowering BOM cost. When compared to BroadR-Reach predecessors, the TJA1100HN adds compliance with the ratified IEEE 100BASE-T1 standard and improved EMC margin.
推薦
Infotainment and Cluster Ethernet
Head-unit and instrument-cluster domains use 100BASE-T1 to share audio, video, and diagnostic streams. The TJA1100HN's small HVQFN-36 footprint and low power dissipation keep thermal budgets comfortable inside dash-mounted enclosures. Cable-disconnect detection and deep-sleep modes help minimize quiescent draw on parked vehicles. The MII/RMII interface pairs cleanly with NXP i.MX and S32K automotive processors used in cockpit modules.
推薦
Body Electronics and Chassis Networks
Body control modules and chassis ECUs increasingly adopt Ethernet for gateway functions, replacing multiple CAN/CAN-FD buses. The TJA1100HN's 100 Mbit/s link provides ample bandwidth for centralized body control, lighting, and chassis data aggregation over a single UTP pair per link. AEC-Q100 Grade 1 qualification, robust ESD tolerance, and NXP's automotive longevity program support high-volume production programs. Compared to legacy CAN-FD at 2 Mbps, the TJA1100HN offers 50x throughput per link.
推薦
Industrial Ethernet Bridging (Non-Automotive Reuse)
Although AEC-Q100 qualified, the TJA1100HN also serves industrial designers who need a compact 100 Mbit/s single-pair Ethernet PHY with extended temperature operation. Factory automation nodes, building automation gateways, and remote sensor installations benefit from the part's robust EMC margin and small footprint. Note that designers should verify that AEC-Q100 stress data satisfies any industrial-specific certifications (IEC 61508, etc.) required by their end application.
推薦
推薦產品摘要
工程參考資料，適用於 TJA1100HN — 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 | TJA1101HN | TJA1100HNZ | TJA1102HN |
|---|---|---|---|---|
| Package | HVQFN-36 (QFN-36) with EPAD | HVQFN-36 - same | HVQFN-36 - same | HVQFN-36 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Ethernet Standard | IEEE 100BASE-T1 | IEEE 100BASE-T1 + TC10 | IEEE 100BASE-T1 | IEEE 2.5G/5GBASE-T1 |
| Data Rate | 100 Mbit/s | 100 Mbit/s | 100 Mbit/s | 2.5 Gbit/s / 5 Gbit/s |
| Cable Interface | Single UTP | Single UTP | Single UTP | Single UTP (higher speed) |
| AEC-Q100 Grade | Grade 1 | Grade 1 | Grade 1 | Grade 1 |
主要差異化特點
- AEC-Q100 Grade 1 qualified with 10-year longevity commitment (對比TJA1102HN)
- Minimal external component count (對比TJA1101HN)
- Single-pair cable reach of at least 15 m (對比Generic 100BASE-TX PHY)
設計說明
Route the MDI_P/MDI_N pair as a 100-ohm differential link with controlled impedance; keep pair length matching within 2 mm and avoid splits orstubs. Place the bias resistor and supply decoupling within a few millimeters of the pins. Follow NXP's reference layout in the TJA1100 application note for EMC-compliant magnetics placement and chassis-ground stitching.
Use a ferrite bead or pi-filter on the analog supply (VDDA) to isolate from digital switching noise. Decouple each supply pin with 100 nF X7R plus a bulk 4.7 uF ceramic close to the pin. The exposed thermal pad must be soldered to a continuous ground plane for thermal dissipation; an unsoldered EPAD can raise junction temperature by 20-30 C under full MDI activity.
Do not substitute non-automotive-grade 100BASE-T1 PHYs in AEC-Q100 designs without explicit OEM approval; commercial-grade parts typically fail 125C HTOL stress. Avoid routing MDI traces near noisy DC-DC or CAN-H/L lines to maintain the link's strict EMC margin. Always configure hardware straps (CONFIG0-2) before MDIO software init to avoid link flap on power-up.
合規資訊
AEC-Q100 Grade 1 qualified per NXP TJA1100 product page. RoHS/REACH compliance stated by NXP. Halogen-free status not explicitly confirmed in the verified web data and marked unknown.
