TJA1051T/3/1U - 3V High-Speed CAN Transceiver | NXP
MPN： TJA1051T/3/1U ✓ 啟用中TJA1051T/3/1U 概覽
A CAN transceiver is an interface IC within the Controller Area Network communication hierarchy. It converts logic-level TXD and RXD signals used by a CAN controller into the dominant and recessive voltage levels carried by CANH and CANL. The TJA1051 family also provides bus-side protection, fault-tolerant operation, and passive behavior when the device is not powered, helping a controller remain operational during certain bus faults.
The TJA1051 is described as a third-generation CAN transceiver with improved electromagnetic compatibility and electrostatic-discharge performance compared with earlier generations. Its VIO connection allows TXD, RXD, and STB signal levels to match the supply voltage of the connected microcontroller. This is particularly useful in mixed 3 V and 5 V systems where a bus transceiver must interface cleanly with modern low-voltage controllers.
The TJA1051T/3 family supports a maximum CAN data rate of 5 Mbit/s and can operate with controller supply voltages down to 3 V. Its high-speed CAN architecture suits passenger vehicles, commercial vehicles, industrial automation systems, and embedded control networks. The SOIC-8 package supports conventional surface-mount assembly and offers a compact interface between a host controller and an external CAN bus.
Typical applications include automotive body and comfort systems, industrial PLC and factory automation networks, robotics controllers, building automation equipment, and embedded CAN gateways. Because CAN uses a shared multidrop bus, correct termination, grounding, routing, and decoupling remain as important as the transceiver selection itself.
When laying out a PCB, place the transceiver close to the CAN connector and keep the CANH and CANL route symmetrical. Route TXD and RXD as controlled-impedance digital signals, provide local supply decoupling, and avoid placing sensitive analog or high-speed clock traces alongside the bus conductors. Verify timing, bus fault behavior, termination, and logic compatibility before production release.
This product record combines the NXP family description with application guidance for engineers evaluating the TJA1051T/3/1U. It highlights the 3 V controller interface, 5 Mbit/s bus capability, SOIC-8 packaging, practical PCB considerations, and the distinctions that must be checked when considering a replacement or a related CAN transceiver.
直接替換替代品，適用於 TJA1051T/3/1U — 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： TJA1051T/3/1U （相同外形與佔位） — 差異在於 Package, Backward Compatibility, Product Type, Automotive Qualification, Bus Fault Protection.
TJA1051T/3/1J
✅ 直接替換聯絡詢價
查看資料表 →TJA1051T/3,118
✅ 直接替換📋 參考替代品（不在目錄中）
TJA1051T/3/1
✅ 直接替換✓ 有庫存
$0.4102 / 單位
查看資料表 →TCAN1051HVDQ1
✅ 直接替換✗ 缺貨
$1 / 單位
查看資料表 →SN65HVD234DR
✅ 直接替換✗ 缺貨
$1.3 / 單位
查看資料表 →TJA1051T/3/1U 規格
| Product Type | High-speed CAN transceiver |
| CAN Transceiver Channels | 1 channel |
| Maximum CAN Data Rate | 5 Mbit/s |
| Controller Interface Supply Compatibility | 3 V to 5 V |
| 封裝 | SOIC-8 |
| Bus Interface | Two-wire CAN bus |
| Controller Interface | TXD and RXD |
| I/O Level Control | VIO-controlled TXD, RXD, and STB signal levels |
| Unpowered Behavior | Passive behavior |
| EMC Performance | Enhanced compared with earlier transceiver generations |
| ESD Performance | Enhanced compared with earlier transceiver generations |
| Backward Compatibility | TJA1051T is backwards compatible with the TJA1050 |
| 安裝類型 | Surface mount |
| Automotive Qualification | AEC-Q100 Grade 1 |
TJA1051T/3/1U soic-8 腳位配置指南
TJA1051T/3/1U（soic-8 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： TJA1051T/3/1U.
請參閱 資料表 以查看完整腳位配置。
典型應用
TJA1051T/3/1U 適用於 6 應用s: Automotive Body Control Networks, Industrial PLC and Factory Automation, Robotics and Motion Control, Building Automation and HVAC, Embedded CAN Gateways, Test Equipment and Diagnostics.
Automotive Body Control Networks
The TJA1051T/3/1U fits automotive body, comfort, and gateway controllers that use a CAN protocol controller plus an external physical-layer transceiver. Its maximum data rate of 5 Mbit/s supports high-speed CAN communication, while VIO-controlled TXD, RXD, and STB levels permit direct connection to a 3 V microcontroller. The improved EMC and ESD performance is particularly relevant to electrically harsh vehicle environments. Place the transceiver near the bus connector, use symmetrical CANH and CANL routing, and validate termination, standby polarity, and fault recovery against the network requirements.
推薦
Industrial PLC and Factory Automation
The TJA1051T/3/1U is suitable for PLC modules, machine controllers, and factory automation equipment that connect legacy CAN networks to a low-voltage embedded processor. The transceiver supports CAN operation up to 5 Mbit/s and exposes a controller interface compatible with 3 V to 5 V logic levels through VIO. Its passive unpowered behavior helps maintain network stability during certain controller power transitions. In a factory design, route the bus away from motor-switching nodes, use a robust connector and protective network, and verify the termination strategy for each cable length.
推薦
Robotics and Motion Control
The TJA1051T/3/1U can connect a robot controller, actuator hub, or remote I/O module to a high-speed CAN backbone carrying commands and sensor feedback. Its 5 Mbit/s capability provides adequate bandwidth for coordinated motion and distributed diagnostics, while the 3 V-capable logic interface fits compact embedded controllers. Keep the CANH and CANL pair tightly coupled, separate it from motor power paths, and test operation with the selected termination because long cable runs and branch stubs can alter signal timing and fault margins.
推薦
Building Automation and HVAC
The TJA1051T/3/1U is appropriate for building automation controllers, HVAC modules, room controllers, and sensor gateways that use CAN for reliable multi-drop communication. The VIO feature allows the transceiver logic to operate at the controller's 3 V supply while the bus side handles the physical differential signaling. This reduces level-shifting complexity in compact controls. Designers should use low-ESR local decoupling, preserve a common ground reference between nodes, and isolate CAN routing from mains-derived switching nodes to minimize common-mode disturbances.
推薦
Embedded CAN Gateways
The TJA1051T/3/1U is useful in protocol gateways that bridge an embedded CAN controller to another communications interface. A 5 Mbit/s CAN physical layer permits efficient transfer of real-time process data, and the 3 V logic compatibility supports compact gateway designs built around modern microcontrollers. Choose the gateway supply architecture so the transceiver receives clean VCC and VIO rails, and validate controller wake, sleep, and standby transitions. The passive unpowered behavior is advantageous when a gateway is reset while other nodes continue communicating.
推薦
Test Equipment and Diagnostics
The TJA1051T/3/1U can serve in CAN diagnostic tools, interface modules, and automated test fixtures where a host controller needs access to a physical two-wire network. Its 5 Mbit/s capability supports both functional testing and communication with high-speed CAN nodes. Use controlled bus termination and diagnostic protection appropriate to the bench environment, and keep the host digital interface away from high-energy bus faults. Before production use, verify loopback behavior, error reporting, timeout handling, and state transitions across the controller's complete operating range.
推薦
推薦產品摘要
工程參考資料，適用於 TJA1051T/3/1U — 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 | TJA1051T/3/1J | TJA1051T/3,118 | TJA1051T/3/1 | TCAN1051 | SN65HVD234 |
|---|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Texas Instruments |
| Package | SOIC-8 | SOIC-8 - same package | SOIC-8 - same package | SOIC-8 - same package | SOIC-8 - same package | SOIC-8 - same package |
| Transceiver Type | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver | High-speed CAN transceiver |
| Transceiver Channels | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel | 1 channel |
主要差異化特點
- Native 3 V controller-interface support (對比SN65HVD234)
- Third-generation EMC and ESD improvements (對比TJA1050T)
- Passive behavior during loss of power (對比TCAN1051)
設計說明
Route CANH and CANL as a tightly coupled differential pair with a continuous reference plane and avoid stubs, vias, and impedance discontinuities wherever possible. Keep the transceiver close to the bus connector so surge current is limited to the protected interface region. Preserve the connector-to-transceiver ground return, and place external bus protection close to the connector rather than near the controller.
Connect VIO to the microcontroller supply voltage so TXD, RXD, and STB operate at compatible logic levels. Provide separate, local bypass capacitors at VCC and VIO, with the shortest possible return path to the device ground pins. Confirm the final capacitor values and stability requirements against the NXP datasheet, and verify power-up and power-down sequencing across every controller operating state.
Do not assume that identical SOIC-8 packages guarantee a drop-in replacement. Before substituting TCAN1051 or SN65HVD234, compare VIO ranges, logic thresholds, STB or EN polarity, timeout behavior, loopback implementation, bus fault response, and pin-level timing. The NXP family order codes also require confirmation because suffix differences can identify reel, regional, or other commercial packaging details.
Keep switching regulators, relay drivers, motor outputs, and high-current power loops away from CANH and CANL. Maintain a solid ground reference and use the shortest practical ground connection between the transceiver, controller, and connector. If the bus must cross a noisy region, route it perpendicular to the dominant noise direction and verify signal integrity with an oscilloscope under the worst operating load.
合規資訊
The cross-reference material identifies the TJA1051T/3 family as AEC-Q100 Grade 1. No separate RoHS, REACH, lead-free, halogen-free, or conflict-minerals declaration was established for the exact order code, so those fields remain unknown.