TJA1049T/3/1Z - Standby CAN Transceiver | NXP Semiconductors
料号： TJA1049T/3/1Z ✓ 量产中TJA1049T/3/1Z 概述
A CAN transceiver is the physical-layer interface between a digital CAN controller and a differential CAN bus. It converts controller-side TXD and RXD signals into bus-level CANH and CANL signals, while protecting the controller from electrical bus conditions. The TJA1049 supports the physical-layer requirements defined by ISO 11898-2:2003, ISO 11898-5:2007, and the updated ISO 11898-2:2016 version.
The TJA1049T/3 provides a separate VIO supply domain for direct connection to microcontrollers operating from 3 V to 5 V. TXD, RXD, and STB signal levels follow the selected VIO voltage. Its Standby mode reduces supply demand while retaining bus wake-up operation, making it useful in vehicle and industrial equipment that must remain responsive without continuously powering the complete control system.
The device is designed as a drop-in evolution for established 5 V CAN nodes. The NXP manufacturer datasheet states that the TJA1049T is 100% backward compatible with the TJA1040 when operated with a 5 V microcontroller. It also covers existing PCA82C250 and PCA82C251 applications, which helps simplify qualification and PCB migration for mature CAN architectures.
Typical applications include automotive body and comfort modules, industrial automation equipment, robotic controllers, building systems, and low-power CAN nodes. The transceiver is particularly appropriate when a controller operates below 5 V or when low-current bus wake-up is needed to reduce inactive power consumption.
PCB implementation should preserve the CAN bus differential routing, provide a common reference ground, and follow NXP’s recommended input and output capacitance. Decoupling capacitors should be placed close to VCC and VIO, while CANH and CANL traces should remain physically coupled with minimized stub length to maintain signal integrity.
This page combines manufacturer specifications, practical application guidance, verified package information, and engineering-focused replacement comparisons. It also identifies where a pin-compatible alternative changes wake-up behavior or controller-interface voltage, helping engineers narrow a replacement without overlooking functional differences.
直接替换替代料： TJA1049T/3/1Z ——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： TJA1049T/3/1Z （相同外形与封装尺寸） ——差异在于 Package, Peak Reflow Temperature, Protocol.
TJA1049T/3J
✅ 直接替换联系询价
查看数据手册 →TJA1049T/1Z
✅ 直接替换联系询价
查看数据手册 →TJA1042T/3,118
✅ 直接替换📋 参考替代料（不在目录中）
TJA1057T/1Z
✅ 直接替换联系询价
查看数据手册 →TJA1040T/VM
✅ 直接替换📋 参考替代料（不在目录中）
TCAN1044A-Q1
✅ 直接替换📋 参考替代料（不在目录中）
TJA1049T/3/1Z 规格参数
| Product Type | High-speed CAN transceiver |
| Controller Interface Supply Range | 3 V to 5 V |
| CAN Bus | 2-wire differential CAN bus |
| Wake-Up Capability | Bus wake-up from Standby mode |
| Standby Control | STB input |
| ISO 11898-2 Support | ISO 11898-2:2003 and updated ISO 11898-2:2016 version |
| ISO 11898-5 Support | ISO 11898-5:2007 |
| Backwards Compatibility | 100% compatible with TJA1040 at 5 V MCU supply |
| Legacy Application Support | PCA82C250 and PCA82C251 applications |
| Certification | VeLIO certified |
| 封装 | 8-pin SOIC |
| 安装类型 | Surface mount |
| Peak Reflow Temperature | 260 C |
| Moisture Sensitivity Level | MSL 1 |
TJA1049T/3/1Z 引脚配置
| 引脚 1 | VIO — Controller-interface supply for TXD, RXD, and STB |
| 引脚 2 | TXD — Controller transmit-data input |
| 引脚 3 | STB — Standby-mode control input |
| 引脚 4 | GND — Ground connection |
| 引脚 5 | RXD — Controller receive-data output |
| 引脚 6 | CANL — CAN low-side bus output and input |
| 引脚 7 | CANH — CAN high-side bus output and input |
| 引脚 8 | VCC — Transceiver supply input |
典型应用
TJA1049T/3/1Z 适用于 6 应用s: Automotive Body and Comfort Modules, Industrial Automation and Factory Control, Robotics and Mobile Equipment, Building and HVAC Networks, Low-Power Sensor and Diagnostic Nodes, Test Equipment and Communication Modules.
Automotive Body and Comfort Modules
The TJA1049T/3/1Z fits distributed automotive body and comfort controllers that communicate over a two-wire CAN bus and use a 3.3 V microcontroller. Its 3 V to 5 V VIO range lets TXD, RXD, and STB match the controller supply directly, while Standby mode with bus wake-up helps modules react after the vehicle network becomes active. The 8-pin SOIC package also supports compact control boards. Validate the ISO 11898 network configuration and wake-up pattern during vehicle-level validation.
推荐
Industrial Automation and Factory Control
Use the TJA1049T/3/1Z in PLC modules, motor controllers, sensors, and factory equipment that exchange commands and diagnostics over CAN. The separate 3 V to 5 V VIO domain supports mixed-voltage controller designs, and low-current Standby operation is useful in machinery where idle modules must still wake when another node initiates traffic. Its documented compatibility with legacy TJA1040, PCA82C250, and PCA82C251 designs simplifies maintenance of installed automation equipment.
推荐
Robotics and Mobile Equipment
The TJA1049T/3/1Z is suitable for robot controllers, autonomous mobile systems, and actuator gateways where a low-voltage MCU communicates over a robust differential bus. VIO can follow a 3 V to 5 V MCU supply without translating TXD, RXD, and STB through additional logic. Bus wake-up supports equipment that remains mostly asleep but must respond when supervisory commands arrive. Follow NXP’s CANH and CANL routing and termination guidance to preserve differential signal integrity.
推荐
Building and HVAC Networks
The TJA1049T/3/1Z can connect thermostats, room controllers, pumps, dampers, and supervisory panels in a building CAN network. Its 3 V to 5 V controller interface supports cost-conscious low-voltage embedded controllers, while Standby and bus wake-up allow distributed equipment to remain responsive without continuously operating at full power. The 8-pin SOIC footprint is suitable for compact multi-board installations. Verify termination placement at both physical ends of each CAN segment.
推荐
Low-Power Sensor and Diagnostic Nodes
The TJA1049T/3/1Z suits remote sensor hubs and diagnostic modules that need a low-power standby path but must detect activity on the CAN bus. The /3 interface operates with microcontrollers supplied from 3 V to 5 V, allowing TXD, RXD, and STB to use the controller’s native logic levels. Its compatibility with established CAN transceiver applications supports controlled migration of existing measurement systems. Design the bus termination and common-mode environment according to the manufacturer recommendations.
推荐
Test Equipment and Communication Modules
The TJA1049T/3/1Z is useful in CAN diagnostic tools, interface adapters, automated test equipment, and communication modules that must connect a modern controller to an established bus. The 3 V to 5 V VIO range simplifies controller integration, and the documented TJA1040 compatibility supports use with legacy 5 V test systems. Standby mode with bus wake-up lets portable instruments remain responsive while reducing inactive consumption. Confirm the selected wake-up pulse sequence before software or hardware qualification.
推荐
推荐产品汇总
工程参考数据： TJA1049T/3/1Z ——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 | TJA1049T/3J | TJA1049T/1Z | TJA1042T/3,118 | TJA1057T/1Z | TJA1040T/VM | TCAN1044A-Q1 |
|---|---|---|---|---|---|---|---|
| Package | SOIC-8 | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same | SOIC-8 - same |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments |
关键差异点
- Supports 3 V and 5 V microcontroller interfaces through the /3 configuration （对比 TJA1040T/VM)
- Single-edge CAN wake-up behavior （对比 TCAN1044A-Q1)
- Direct support for established CAN transceiver applications （对比 TJA1042T/3,118)
设计说明
Place the VCC and VIO decoupling capacitors directly beside their corresponding pins, with short ground returns. Keep TXD and RXD traces away from CANH and CANL where practical, and connect the transceiver ground to the controller ground through a low-impedance path. Separate supply and signal return currents reduce the chance that switching current on the MCU rail disturbs the CAN receiver.
Route CANH and CANL as a closely coupled differential pair with matched geometry and minimal stubs. Install the CAN termination network only at the physical endpoints of the bus, using the resistor value specified by the NXP application guidance. Avoid adding test pads or long branches between the transceiver and connector, because excessive stub length can degrade differential signal quality.
Do not assume that equivalent pin position guarantees identical wake-up behavior. The TJA1049 responds after a recessive-to-dominant bus activity pattern, while TCAN1044A-Q1 uses a dominant-to-recessive-to-dominant sequence. Also connect VIO to the MCU supply on the /3 version so TXD, RXD, and STB use the intended logic levels. Validate these conditions before releasing a replacement design.
合规信息
The product is identified as VeLIO certified. Specific RoHS, REACH, automotive-qualification, lead-free, halogen-free, and conflict-minerals declarations are not stated for the exact MPN in the manufacturer product material and require confirmation before regulatory use.