TJA1051T/3/1J - 5 Mbit/s CAN Transceiver | NXP
부품 번호: TJA1051T/3/1J ✓ 활성TJA1051T/3/1J 개요
A CAN transceiver is an interface IC within the CAN controller hierarchy and the broader industrial and automotive networking ecosystem. It converts the controller's transmit and receive logic signals into differential CAN bus levels and presents received bus data to the controller. The TJA1051 family is intended for high-speed CAN networks and provides passive behavior on the bus when its supply is off.
Key features include a 5 Mbit/s maximum data rate, improved electromagnetic compatibility, enhanced electrostatic-discharge performance, and compatibility with 3 V to 5 V microcontroller supply levels. The VIO-related version supports direct connection to microcontrollers operating at those lower I/O voltages, which simplifies interfacing between a 5 V transceiver supply and a 3.3 V CAN controller.
Technically, the transceiver bridges a logic-domain CAN controller and a differential physical bus. Its TXD input accepts controller command data, while RXD reports received bus state to the controller. CANH and CANL carry the complementary differential signal, and the S input supports standby behavior when the device supports that operating mode. The manufacturer datasheet specifically notes backwards compatibility with the TJA1050.
Typical uses include automotive body and comfort electronics, industrial automation controllers, building automation equipment, robotics, diagnostic interfaces, and embedded CAN gateways. The device is particularly appropriate when a 3.3 V controller must communicate through a 5 V CAN transceiver without adding level-shifting circuitry between TXD, RXD, and S.
Designers should provide the bus termination and common-mode installation required by the CAN network rather than relying on the transceiver for termination. Decoupling close to VCC and VIO, controlled bus stubs, correct grounding, and an appropriate CAN controller timing configuration are essential for reliable operation.
This page consolidates the verified manufacturer and distributor information, practical application guidance, parameter comparisons, and verified drop-in alternatives. It also distinguishes documented TJA1051 family differences from broader functional equivalents so engineers can assess PCB compatibility without confusing protocol speed or standby behavior with physical pin compatibility.
드롭인 대체품: TJA1051T/3/1J — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
이 시리즈의 변형
다음과 드롭인 호환되는 동일 시리즈 모델: TJA1051T/3/1J (동일 폼 팩터 및 풋프린트) — 차이점: Product Type, Package, Operating Temperature, Protocol, RoHS Status.
TJA1051T/3,118
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TJA1051T/E
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TJA1051TK/3
✅ 드롭인📋 참조 대체품 (카탈로그에 없음)
TCAN1051VDRQ1
✅ 드롭인가격 문의
데이터시트 보기 →TJA1051T/3/1J 사양
| Product Type | High-speed CAN bus transceiver |
| CAN Protocol Support | Controller Area Network |
| Maximum CAN Data Rate | 5 Mbit/s |
| 공급 전압 | 5.5 V maximum |
| Microcontroller I/O Supply Compatibility | 3 V to 5 V |
| Bus Configuration | Two-wire differential CAN bus |
| Transceiver Type | 1/1 half transceiver |
| Logic Input Levels | 3 V to 5 V compatible |
| Bus Interface | CANH and CANL differential outputs |
| Controller Interface | TXD, RXD, and S pins |
| Off-Bus Behavior | Ideal passive behavior when supply voltage is off |
| Electromagnetic Compatibility | Improved EMC performance |
| Electrostatic Discharge Performance | Improved ESD performance |
| Backward Compatibility | Compatible with TJA1050 |
| 패키지 | 8-pin SOIC |
| 실장 유형 | Surface mount |
TJA1051T/3/1J 핀 구성
| 핀 1 | GND — Ground connection |
| 핀 2 | TXD — Transmit data input from the CAN controller |
| 핀 3 | RXD — Receive data output to the CAN controller |
| 핀 4 | VIO — Logic-level supply input for TXD, RXD, and S on the TJA1051T/3 version |
| 핀 5 | VCC — Transceiver supply connection |
| 핀 6 | CANL — CAN low bus connection |
| 핀 7 | CANH — CAN high bus connection |
| 핀 8 | S — Standby input |
일반적인 애플리케이션
TJA1051T/3/1J 적합 용도: 6 애플리케이션s: Automotive Body Control Module, Industrial Automation Controller, Robotics and Motion Control, Building Automation Network, Vehicle Diagnostic Interface, Embedded CAN Gateway.
Automotive Body Control Module
The TJA1051T/3/1J fits an automotive body-control CAN node because it supports high-speed CAN operation up to 5 Mbit/s while allowing direct interfacing with microcontrollers operating from 3 V to 5 V. Its documented improved electromagnetic compatibility and electrostatic-discharge performance are valuable in an electrically noisy vehicle environment. Connect CANH and CANL to the protected bus wiring, place termination only at the appropriate bus endpoints, and configure the controller for the transceiver's timing characteristics. The /3 version's VIO support helps align TXD, RXD, and S levels with a 3.3 V MCU while the transceiver itself operates from the vehicle's nominal 12 V system. Final protection, transient immunity, and qualification requirements should be verified against the complete automotive design specification.
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Industrial Automation Controller
The TJA1051T/3/1J is appropriate for an industrial automation node that must exchange commands and diagnostic data over a high-speed CAN bus. Its 5 Mbit/s capability provides useful bandwidth for machine-control traffic while the 3 V to 5 V logic compatibility supports both 5 V and 3.3 V embedded controllers. The transceiver handles the physical differential bus layer, leaving the selected MCU to implement CAN protocol timing, message filtering, fault handling, and diagnostics. For factory equipment, route the CAN pair as a controlled impedance-coupled pair, maintain a common ground reference, use suitable transient protection at exposed connectors, and verify that cable lengths, topology, and termination comply with the CAN network design. The improved EMC behavior is particularly relevant around motors, relays, contactors, and switching power supplies.
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Robotics and Motion Control
The TJA1051T/3/1J can connect a robot controller or motor-control supervisory node to a two-wire CAN network carrying position commands, sensor results, and status information. A 5 Mbit/s bus rate is appropriate for deterministic multi-node communication when the network topology and controller timing meet standard high-speed CAN requirements. Because the /3 version accepts controller I/O levels from 3 V to 5 V, it allows a modern 3.3 V MCU to drive TXD and interpret RXD without a separate logic-level converter. In a robot, keep CAN wiring away from motor and gate-drive currents, use twisted balanced cabling where practical, and add appropriately selected bus protection at external harness interfaces. If a new design specifically requires CAN FD arbitration or higher payload-rate operation, evaluate a dedicated CAN FD transceiver instead.
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Building Automation Network
The TJA1051T/3/1J supports building-automation nodes that connect sensors, actuators, room controllers, and supervisory equipment over a high-speed CAN segment. The 5 Mbit/s maximum data rate allows the network to carry measurement updates and control commands efficiently, while the 3 V to 5 V interface range simplifies connections to embedded controllers with different logic supplies. Its improved EMC and ESD characteristics are useful around relays, dimmers, contactors, and long building cable runs, although the complete installation still requires surge and transient protection at cable boundaries. Follow the manufacturer guidance for VIO, supply decoupling, CANH/CANL routing, and grounding. For installations requiring standardized higher-level building protocols, confirm that the selected gateway or controller supports the physical CAN layer implemented by this transceiver.
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Vehicle Diagnostic Interface
The TJA1051T/3/1J is suitable for a diagnostic interface or service adapter that must communicate with an in-vehicle CAN network at the standard high-speed CAN rate. The transceiver's 5 Mbit/s capability supports ordinary CAN traffic, and the VIO arrangement permits a 3.3 V or 5 V host controller to connect without additional TXD and RXD level translation. The receiving path converts differential CAN bus activity into a logic signal for the host, while the transmitting path sends diagnostic requests onto the bus. Install the device with local supply decoupling, maintain a controlled CANH/CANL pair, and provide protection appropriate to the harness connection. Diagnostic software must match the vehicle's CAN protocol and identifier database; electrical compatibility alone does not guarantee protocol-level compatibility with every vehicle or service tool.
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Embedded CAN Gateway
The TJA1051T/3/1J can form the CAN-side interface of an embedded gateway that translates or aggregates data between a high-speed CAN network and another communications domain. Its 5 Mbit/s maximum rate supports efficient transfer of process data, while direct 3 V to 5 V microcontroller compatibility allows integration with modern embedded processors and companion interface devices. The gateway design should define deterministic CAN identifiers, filtering, overload handling, and bus-off recovery in firmware rather than relying on the transceiver for protocol functions. Keep the CAN route compact and symmetrical, place network termination at the two physical endpoints, and separate it from switching regulators and high-current peripherals. If future expansion requires CAN FD data rates or payload improvements, use a CAN FD transceiver and controller together instead of assuming that this classic CAN device can negotiate CAN FD.
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추천 제품 요약
엔지니어링 참조 데이터: TJA1051T/3/1J — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TJA1051T/3,118 | TJA1051T/E | TJA1051TK/3 | TCAN1051V |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments |
| Package | 8-pin SOIC | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same | 8-pin SOIC - same |
| Transceiver Type | 1/1 half CAN transceiver | 1/1 half CAN transceiver | 1/1 half CAN transceiver | 1/1 half CAN transceiver | 1/1 CAN FD transceiver |
| Protocol Generation | Classic CAN | Classic CAN | Classic CAN | Classic CAN | CAN FD |
주요 차별점
- Direct compatibility with both 3.3 V and 5 V controller logic domains (vs TCAN1051V)
- Established 5 Mbit/s high-speed CAN transceiver architecture (vs TCAN1051V)
- Optional very-low-current Off mode in the same TJA1051 family (vs TJA1051T/3,118)
- Passive bus behavior when the supply is off (vs TJA1051T/3,118)
설계 노트
Connect VIO to the CAN controller's supply voltage on the TJA1051T/3 version so TXD, RXD, and S use the correct logic levels. The manufacturer states that this permits direct interfacing with microcontrollers operating from 3 V to 5 V. Place the required local supply-decoupling capacitor close to the transceiver's power pins and keep the return-current path short. Do not infer a specific capacitor value or operating voltage from the search excerpts; verify it against the complete NXP data sheet and the controller's supply requirements.
Route CANH and CANL as a closely coupled pair with symmetric geometry, continuous ground reference, and minimal stub length. Place termination only at the physical ends of the CAN segment, using the network's specified termination arrangement rather than adding broad onboard termination by default. This layout discipline reduces radiated emissions, susceptibility to electromagnetic noise, and reflections that can destabilize high-speed communication at rates up to 5 Mbit/s.
A matching SOIC-8 outline does not by itself prove that two CAN transceivers are interchangeable. Verify TXD and RXD behavior, standby or Off-mode logic, VIO handling, passive state when unpowered, EMC performance, ESD rating, and CAN FD capability before releasing a substitution. The TJA1051T/3,118 is the closest same-family choice, while TCAN1051V introduces CAN FD-oriented behavior that may require controller and firmware changes.
Keep the CAN physical layer away from switching nodes, motor phases, relay contacts, and high-current return paths. Use a continuous ground reference, carefully route the differential pair through the PCB, and apply suitable transient protection at cable entry points where the installation exposes the bus to ESD, surge, or automotive transients. The transceiver's improved EMC and ESD characteristics reduce vulnerability but do not eliminate the need for system-level shielding, filtering, and protective components.
규정 준수 정보
The verified search excerpts mention RoHS and REACH comparison information for related orderings and associate one TJA1051T/3 source with AEC-Q100 Grade 1, but they do not provide the authoritative compliance declaration for TJA1051T/3/1J. Each status therefore remains unknown pending the NXP product page or material declaration.