TJA1050 - High-Speed CAN Transceiver, 5V | NXP Semiconductors
料号： TJA1050 ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.62 | $1.62 |
| 10 | $1.46 | $14.60 |
| 100 | $1.18 | $118.00 |
| 500 | $0.97 | $485.00 |
| 1,000 | $0.84 | $840.00 |
TJA1050 概述
A CAN transceiver is an interface IC that sits between a microcontroller's CAN protocol controller and the differential CANH/CANL bus wires. Its hierarchical role is: CAN transceiver → bus interface IC → interface integrated circuit → semiconductor. The TJA1050 family forms part of NXP's third-generation high-speed CAN transceivers, succeeding earlier devices like the PCA82C250 with improved slope control, lower electromagnetic emissions, and integrated protection features against bus shorts and transient voltages.
Key features include an operating supply voltage range of 4.75V to 5.25V, low quiescent current consumption, integrated thermal protection, and a recessive bus output voltage that approximates the supply voltage (VCC) for improved logic-level compatibility. The device supports both normal and silent (standby-like) modes selected via the S pin and provides differential transmit/receive capability across an extended common-mode range on the bus. Differential receiver thresholds are tightly controlled to support CAN-FD-ready bit timing in many classic CAN networks.
The architecture uses a current-driven recessive output and a dominant-driving topology with slope control to minimize ringing and RF emissions. An internal watchdog and thermal shutdown safeguard the die against bus shorts to battery or ground, while an undervoltage detection circuit disables the transmitter when VCC drops below the operational threshold to prevent erroneous bus states during power-up or power-down sequences.
Typical applications include automotive body control modules, industrial CAN-based sensor networks, building automation gateways, and battery management systems where galvanic isolation can be implemented with a transformer or capacitive barrier after the transceiver stage. The TJA1050 is commonly paired with 8-bit or 32-bit microcontrollers that include an integrated CAN controller, such as NXP's LPC and S32K families.
When designing with the TJA1050, place a 120 Ω termination resistor at each end of the CAN bus segment and keep the stub length under roughly 30 cm at 1 Mbit/s. Decouple VCC with a 100 nF ceramic capacitor close to the supply pin, and provide adequate ground plane coverage under the bus traces to maintain the differential impedance target of 120 Ω.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： TJA1050 ——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： TJA1050 （相同外形与封装尺寸） ——差异在于 Operating Temperature, Package, Maximum Data Rate, Product Type, Protocol.
快速对比工具——选择替代料号进行并排对比：
TJA1051T/3/1
✅ 直接替换✓ 有现货
$0.4102 / 个
查看数据手册 →TJA1057T/3
✅ 直接替换📋 参考替代料（不在目录中）
TJA1040T
✅ 直接替换📋 参考替代料（不在目录中）
SN65HVD230DR
✅ 直接替换✓ 有现货
$0.94 / 个
查看数据手册 →SN65HVD1050A-Q1
✅ 直接替换📋 参考替代料（不在目录中）
TJA1050 规格参数
| Product Type | High-speed CAN transceiver |
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| Maximum Data Rate | 1 Mbit/s |
| Number of Drivers/Receivers | 1/1 |
| Protocol | CAN 2.0A/B (classic CAN); controller-side interface only |
| Bus Fault Protection | Short to battery, short to ground, thermal shutdown |
| 工作温度 | -40 C to +150 C |
| Standby/Mode Pin | Yes (S pin, silent mode) |
| 封装 | SOIC-8 (TJA1050T/CM,118) |
| 安装类型 | Surface Mount |
| MSL 等级 | 1 |
| RoHS 状态 | Compliant |
TJA1050 引脚配置
| 引脚 1 | TXD — Transmit data input from CAN controller (TTL-level referenced to VCC) |
| 引脚 2 | GND — Ground reference for logic and bus drivers |
| 引脚 3 | VCC — +5V supply input (4.75V to 5.25V operating range) |
| 引脚 4 | RXD — Receive data output to CAN controller (recessive = logic HIGH, dominant = LOW) |
| 引脚 5 | VREF — Common-mode reference voltage output (approx 0.5 × VCC) for external biasing |
| 引脚 6 | CANL — Low-level CAN bus line (differential pair with CANH) |
| 引脚 7 | CANH — High-level CAN bus line (differential pair with CANL) |
| 引脚 8 | S — Silent mode select input (HIGH = normal, LOW = high-Z bus / standby) |
典型应用
TJA1050 适用于 6 应用s: Automotive Body Control Modules, Industrial CAN Sensor Networks, Battery Management Systems (BMS), Building Automation Gateways, Industrial Lift and Elevator Control, CAN-Based Embedded Instrumentation.
Automotive Body Control Modules
The TJA1050's 5V single-supply rail (4.75-5.25V) and -40C to +150C operating range map directly to automotive body-electronics environments such as BCMs, door modules, and HVAC controllers. Placed between an NXP S32K or LPC microcontroller's CAN controller and the bus, it converts TTL-level TXD/RXD into differential CANH/CANL signaling up to 1 Mbit/s with very low electromagnetic emissions thanks to the integrated slope control. Unlike a discrete optocoupler + bus driver, the TJA1050 integrates thermal shutdown, undervoltage detection, and bus-fault protection in one SO-8 die, reducing PCB area by ~60% in typical node designs and improving reliability against shorts to battery or ground.
推荐
Industrial CAN Sensor Networks
In factory-floor sensor and actuator backbones based on CANopen or DeviceNet, the TJA1050 provides robust differential signaling across cable lengths up to a few hundred meters at 125 kbit/s. Its high common-mode rejection and integrated slope control suppress ringing on long stub connections without external EMC components, supporting up to 32 nodes per segment per ISO 11898-2 when 120 Ω termination is applied at each end. Compared to slower RS-485 transceivers, the TJA1050's hardware-based arbitration and frame-level error confinement reduce firmware complexity and enable deterministic latency for real-time control loops in industrial automation.
推荐
Battery Management Systems (BMS)
Within a 12V/48V battery management system, the TJA1050 connects the slave monitoring boards (cell-voltage and temperature acquisition) to the master controller via a CAN backbone, isolating MCU-side logic from the noisy battery environment. The 5V VCC ties directly to onboard low-dropout regulators, and the differential bus rejects common-mode noise from inverter switching or motor commutation in the same chassis. Its very low quiescent current in recessive state is acceptable for systems that sleep periodically, although for deep-sleep nodes the TJA1051 with sub-10 uA standby is preferred.
推荐
Building Automation Gateways
Building-automation platforms (BACnet over MS/TP, KNX, or proprietary CAN-based protocols) often use the TJA1050 in gateway nodes that bridge Ethernet to a CAN-based fieldbus segment. The TJA1050's stable recessive bus biasing and fast loop times support real-time polling of HVAC controllers and lighting nodes without the need for an external isolator in low-voltage installations. Unlike Ethernet PHYs, the TJA1050 consumes far less board area and draws tens of milliwatts, making it ideal for compact DIN-rail gateways where thermal dissipation is constrained.
推荐
Industrial Lift and Elevator Control
The TJA1050's wide common-mode range and robust bus-fault handling make it a long-standing candidate for elevator control panels and lift shaft networks where CAN carries safety messages between floor controllers, the hoist machine, and door interlocks. Its dual-shorted-bus protection keeps the network operational under wiring damage common during installation, and the high-EMI immunity satisfies EN 12016 / EN 12015 emissions requirements when paired with proper cable shielding. Compared to isolated 4-20 mA loops, the TJA1050 multi-drop topology reduces cabling cost up to 30% per shaft.
推荐
CAN-Based Embedded Instrumentation
Lab instruments, programmable power supplies, and motion controllers often use the TJA1050 as the service-port connection between the operator panel (CAN master) and per-channel daughtercards. Its 1 Mbit/s capability is sufficient for high-speed tune and trim loops in 4-axis stepper drivers, while the SO-8 footprint drops into legacy PCBs that were originally laid out for the PCA82C250. Engineers should evaluate the silent-mode (S-pin) behavior if the instrument needs selective node deactivation during test sequences.
推荐
推荐产品汇总
工程参考数据： TJA1050 ——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 | TJA1051T/3 | TJA1057T/3 | TJA1040T | SN65HVD230DR | SN65HVD1050A-Q1 |
|---|---|---|---|---|---|---|
| Package | SOIC-8 (TJA1050T/CM,118) | SO-8 (same) | SO-8 (same) | SO-8 (same) | SOIC-8 (same) | SOIC-8 (same) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments | Texas Instruments |
| Supply Voltage | 4.75V to 5.25V | 4.5V to 5.5V | 4.75V to 5.25V | 4.75V to 5.25V | 3.0V to 3.6V | 4.75V to 5.25V |
| Maximum Data Rate | 1 Mbit/s | Up to 5 Mbit/s (CAN FD ready) | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s | 1 Mbit/s |
| Standby / Silent Mode | Silent mode via S pin | Standby with remote wake-up | Silent mode via S pin | Low-current standby with wake-up | Silent mode via Rs pin | Silent mode via Rs pin |
| CAN FD Support | No (Classic CAN 2.0A/B only) | Yes | No | No | No | No |
关键差异点
- Sustained 5V supply band for legacy automotive body ECUs （对比 SN65HVD230)
- Third-generation EMC/ESD successors with same SO-8 footprint （对比 TJA1051T/3)
- Long-term availability through authorized channels （对比 TJA1057T/3 (or other -Q1 AEC-Q100 alternates))
设计说明
Power the TJA1050 from a regulated 5V rail with a 100 nF X7R ceramic decoupling capacitor placed within 5 mm of the VCC pin. Add a 10 µF bulk capacitor on the same rail to suppress transient currents during dominant-to-recessive switching events. The TXD input is referenced to VCC, so a 3.3V MCU cannot drive it directly without violating the HIGH-level input threshold (typically 0.7 × VCC). For 3.3V CAN systems, the TI SN65HVD230 is the typical pin-compatible substitute, since it shares the SO-8 footprint.
Route the CANH and CANL lines as a tightly coupled differential pair with 120 Ω characteristic impedance; keep both traces on the same layer and avoid splitting them across a plane cut. Stubs to the transceiver should be under 30 mm at 1 Mbit/s to limit reflections; place the 120 Ω termination resistors only at the two farthest ends of the bus segment, not on every node. Provide a solid uninterrupted ground plane directly under the bus traces to maintain the controlled-impedance reference.
Do not apply a negative VCC (sub-zero supply) or backfeed the bus: the TJA1050 bus pins are protected against ±25 V transient bus shorts per IEC 61000-4-2, but sustained over-voltage will damage the die. When migrating designs to a TJA1051 or TJA1057, verify the VREF pin behavior - the TJA1050 uses VREF for an internal bias reference (about 0.5 × VCC), while the SN65HVD1050A-Q1 ties VREF to a stronger common-mode driver; the two are NOT always software-compatible. Avoid driving TXD while VCC is below 4.75V because the undervoltage detector will tri-state the bus, potentially causing an incomplete dominant bit that confuses other nodes on the network.
Estimated: at ambient 85 C with bus short (CANH shorted to VCC), the TJA1050's internal thermal shutdown activates near 170 C junction. In a properly designed node with default bus loading, the part dissipates well under 100 mW (estimated: 5V × 20 mA quiescent), so no heatsink is required. However, when the bus is repeatedly driving into a shorted cable during installation tests, the SO-8 θJA of approximately 150 C/W will allow the junction to climb quickly - ensure the surrounding copper area is at least 0.5 sq.in. to avoid nuisance thermal shutdown.
合规信息
RoHS and REACH compliance per manufacturer product page. TJA1050 is NRND; for AEC-Q100-qualified variants use TJA1051/Q1 or TJA1057/Q1 instead. MSL 1 per JEDEC J-STD-020 for SO-8 package.
