TJA1049T/1Z - High-Speed CAN Transceiver with Standby | NXP
料号： TJA1049T/1Z ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.92 | $1.92 |
| 10 | $1.71 | $17.10 |
| 100 | $1.32 | $132.00 |
| 500 | $1.08 | $540.00 |
| 1,000 | $0.94 | $940.00 |
| 3,000 | $0.82 | $2,460.00 |
TJA1049T/1Z 概述
A CAN transceiver is a physical-layer interface IC that translates the digital transmit/receive signals of a CAN protocol controller into the differential voltage levels (CANH/CANL) defined by ISO 11898-2 on the bus, while also providing bus-side ESD protection and dominant/recessive arbitration. As an interface IC the TJA1049T/1Z sits between application-layer MCU/processor and the physical CAN bus, making it a foundational building block for in-vehicle networking, industrial automation and any system requiring robust differential serial communication.
Key features include a very low quiescent current in Standby mode for battery-powered nodes, a SPLIT output for stabilizing the recessive common-mode voltage in networks with multiple unpowered nodes, and transmit data (TXD) dominant time-out protection that prevents the bus from being permanently clamped if the controller fails. The integrated bus wake-up filter rejects transients on CANH/CANL to ensure false wake-ups do not discharge the battery in automotive quiescent scenarios.
Typical applications include automotive body and chassis ECUs, CAN-based powertrain nodes, industrial CANopen and DeviceNet modules, and any 5V microcontroller host that requires a compact, low-power standby-enabled physical-layer interface. Designers often pair the TJA1049T/1Z with 5V MCUs such as the NXP S12K or ST STM32 families, plus a 5V LDO and common-mode choke for EMI hardening.
When designing with this part, observe the bus termination: 120 ohm resistors at each network end with optional split termination for better EMC performance. Decouple VCC with 100 nF ceramic close to the pin and provide a robust PCB ground return for the bus ESD clamps to operate as specified.
直接替换替代料： TJA1049T/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/1Z （相同外形与封装尺寸） ——差异在于 Package, Protocol, Product Type, Operating Temperature.
快速对比工具——选择替代料号进行并排对比：
TJA1049T/3
✅ 直接替换📋 参考替代料（不在目录中）
TJA1049TK/3
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TJA1057T/1Z
✅ 直接替换✓ 有现货
$0.53 / 个
查看数据手册 →TJA1050T/CM
✅ 直接替换 ⚠️ 规格未核验✓ 有现货
$0.2174 / 个
查看数据手册 →TCAN1044A-Q1
✅ 直接替换📋 参考替代料（不在目录中）
TCAN1044AVDR
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TJA1049T/1Z 规格参数
| Product Type | High-Speed CAN Transceiver |
| Number of Drivers/Receivers | 1/1 |
| Protocol | CANbus (ISO 11898-2/-5) |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| Maximum Data Rate | 1 Mbps (CAN FD capable via CAN partial networking supported on /3 variant) |
| 工作温度 | -40C to +125C |
| 封装 | 8-SOIC (SO-8) |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 (per Vyrian listing) |
| Peak Reflow Temperature | 260 C (per Vyrian listing) |
| RoHS 状态 | Compliant |
| VeLIO Certification | Yes (per Mouser listing) |
| Standby / Wake-Up | Standby mode with bus wake-up filter |
| SPLIT Output | Yes (for stabilized recessive common-mode voltage) |
TJA1049T/1Z 引脚配置
| 引脚 1 | TXD — Transmit data input from CAN controller (logic level) |
| 引脚 2 | GND — Ground |
| 引脚 3 | VCC — 5V supply voltage |
| 引脚 4 | RXD — Receive data output to CAN controller |
| 引脚 5 | VIO — Logic-level IO supply (TJA1049T/1Z variant: tied to VCC for 5V) |
| 引脚 6 | CANL — CAN bus low line |
| 引脚 7 | CANH — CAN bus high line |
| 引脚 8 | STB — Standby mode control input (active high to enter Standby) |
典型应用
TJA1049T/1Z 适用于 6 应用s: Automotive Body and Chassis ECUs, Industrial CANopen and DeviceNet Modules, Battery-Connected CAN Sensors with Remote Wake-Up, Gateway and Bridge Modules between CAN Sub-Networks, Agricultural and Off-Road Vehicle CAN Networks, Medical Device Interconnects (CAN-based).
Automotive Body and Chassis ECUs
The TJA1049T/1Z excels in 5V automotive body controllers (HVAC, lighting, seat, door modules) where the MCU runs on a regulated 5V rail and the CAN network must wake only on relevant bus traffic. Its very low Standby-mode quiescent current prevents 12V battery drain during long vehicle parking periods, while the integrated bus wake-up filter rejects RF and ESD transients that could otherwise wake the ECU falsely. The VeLIO certification streamlines tier-1 qualification.
推荐
Industrial CANopen and DeviceNet Modules
Use the TJA1049T/1Z as the physical-layer interface for industrial programmable logic controllers, CANopen I/O blocks and DeviceNet drives where the system MCU hosts a 5V supply and only classical CAN (1 Mbit/s) is needed. The SPLIT output stabilizes the recessive bus common-mode voltage when several nodes are unpowered, which is common in star-topology field installations. A 120 ohm termination at each network end completes the compliant bus.
推荐
Battery-Connected CAN Sensors with Remote Wake-Up
In battery-powered CAN sensors such as trailer rear-light modules, parking sensors, and tire-pressure sensors, the TJA1049T/1Z's low-current Standby mode keeps total quiescent draw on the order of microamps until a bus dominant pulse from another ECU wakes the node. The integrated wake-up filter ignores electrical transients so spurious wake-ups do not flatten the 12V battery. Operating range from -40C to +125C survives under-hood conditions.
推荐
Gateway and Bridge Modules between CAN Sub-Networks
In automotive or industrial gateways that bridge two CAN buses at different speeds or between classical CAN and CAN FD segments, the TJA1049T/1Z provides a small-footprint 8-SOIC CAN physical layer on the 5V segment while the FD side uses an FD-capable transceiver. Its SPLIT output is especially valuable when one sub-network is partially powered down for ASIL or energy-management reasons. Pair with a gateway MCU such as S32K or STM32F4.
推荐
Agricultural and Off-Road Vehicle CAN Networks
Off-road construction and agricultural machinery commonly uses 5V-classical CAN networks that operate in extreme temperature, vibration, and moisture conditions. The TJA1049T/1Z in 8-SOIC handles -40C to +125C ambient and provides a robust, ESD-protected physical layer for engine, transmission, and implement bus networks. Its VeLIO certification and ISO 11898-2 compliance minimize APQP risk in the long-lifecycle vehicle platforms.
推荐
Medical Device Interconnects (CAN-based)
Although less common than industrial CAN, medical device clusters such as patient monitors, infusion pumps, and lab analyzers sometimes use CAN for safety-critical inter-module communication with deterministic latency. The TJA1049T/1Z provides a low-power, ISO 11898-compliant physical layer for these isolated, low-volume networks. Its small SO-8 footprint suits space-constrained handheld designs and its low Standby current extends battery runtime on portable units.
推荐
推荐产品汇总
工程参考数据： TJA1049T/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/3 | TJA1057T/1Z | TCAN1044A-Q1 | TJA1050T |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | NXP Semiconductors |
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same | 8-SOIC - same |
| Supply Voltage (VCC) | 4.75 V to 5.25 V | 4.5 V to 5.5 V | 4.75 V to 5.25 V | 4.5 V to 5.5 V (with 3V-5V VIO) | 4.75 V to 5.25 V |
| Max CAN Data Rate | 1 Mbps (classical CAN) | 1 Mbps (classical CAN) | 5 Mbps (CAN FD) | 5 Mbps (CAN FD) | 1 Mbps (classical CAN) |
| Standby Mode | Yes (with bus wake-up) | Yes (with bus wake-up) | Yes (with selective wake) | Yes (with bus wake-up) | No |
| VIO / Wide-Range Logic Support | No (5V only) | Yes (3V to 5V VIO) | Yes (3V to 5V VIO) | Yes (3V to 5V VIO) | No (5V only) |
| ISO 11898 Compliance | ISO 11898-2:2003 / -5:2007 | ISO 11898-2:2003 / -5:2007 | ISO 11898-2:2016 | ISO 11898-2:2016 | ISO 11898-2:2003 |
| AEC-Q100 Grade | VeLIO certified, automotive qualified | VeLIO certified, automotive qualified | Automotive qualified | AEC-Q100 qualified | Automotive qualified |
关键差异点
- Lowest Standby-mode quiescent current in the family for battery-connected nodes （对比 TJA1050T)
- 5V-only legacy interface vs. 3V-5V VIO flexibility （对比 TCAN1044A-Q1)
- Pure classical CAN vs. CAN FD upgrade （对比 TJA1057T/1Z)
设计说明
Estimated: keep the PCB trace between VCC pin (3) and the 100 nF X7R decoupling capacitor under 2 mm to suppress supply-borne switching transients that could couple into TXD. Place the common-mode choke and 120 ohm termination resistors immediately adjacent to CANH/CANL to maximize ESD immunity. The PCB ground plane under the SO-8 exposed lead-frame should be stitched to GND with multiple vias to provide a low-impedance return for the bus ESD clamps.
Critical: Do NOT tie the VIO pin (pin 5) of the TJA1049T/1Z to a 3.3V rail - the /1Z variant does NOT support VIO and the cell is internally tied to VCC. Use the /3 variant for mixed-voltage MCUs. Leaving the STB pin floating can cause unpredictable transitions; pull STB low via 100 kohm to GND for Normal mode or drive high from the MCU to enter Standby. A TXD stuck-dominant fault (e.g. firmware hangs) is handled by the internal TXD dominant time-out.
Estimated: with VCC=5V and 5 mA recessive quiescent, the TJA1049T/1Z dissipates roughly 25 mW in normal recessive mode. In Dominant mode with a 60 ohm equivalent bus load, loop current through the transmitter can reach 60-90 mA, raising dissipation briefly to 300-450 mW. Across a 1 Mbit/s CAN frame, average dissipation stays well within SO-8 thermal limits (~500 mW at 25C ambient), so no heatsink is required. The Standby-mode current on the order of microamps requires careful 12V battery modeling for weeks-long parked periods.
For high-speed CAN at 1 Mbit/s in electrically noisy environments, use split termination (two 60 ohm resistors with a 10 nF to ground at the midpoint) on each bus end to route common-mode noise to ground and stabilize the recessive level. The TJA1049T/1Z's SPLIT output pin can be used to drive the bus midpoint reference in networks where SPLIT biasing is desired. Keep stub lengths under 0.3 m to keep reflections below the CAN signal-integrity mask.
合规信息
VeLIO certified per Mouser listing; AEC-Q100 implied by NXP automotive support of the TJA1049 family. RoHS and lead-free per Vyrian and standard NXP automotive IC policy.
