TJA1049T/1Z - High-Speed CAN Transceiver with Standby | NXP
MPN: TJA1049T/1Z ✓ Hoạt độngTJA1049T/1Z Tóm tắt
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.
Bộ thay thế dễ dàng lắp đặt cho TJA1049T/1Z — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với TJA1049T/1Z (cùng hình factor và footprint) — khác nhau ở Package, Protocol, Product Type, Operating Temperature.
TJA1049T/3
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TJA1049TK/3
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TJA1057T/1Z
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TJA1050T/CM
✅ Drop-In ⚠️ Thông số chưa được xác minhLiên hệ để biết giá
Xem tài liệu →TCAN1044A-Q1
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
TCAN1044AVDR
✅ Drop-In ⚠️ Thông số chưa được xác minh📋 Tham chiếu thay thế (không có trong danh mục)
TJA1043T
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →TJA1049T/1Z Thông số kỹ thuật
| 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) |
| Nhiệt độ hoạt động | -40C to +125C |
| Hộp | 8-SOIC (SO-8) |
| Kiểu lắp đặt | Surface Mount |
| Cấp MSL | 1 (per Vyrian listing) |
| Peak Reflow Temperature | 260 C (per Vyrian listing) |
| Trạng thái RoHS | 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) |
Cấu hình chân TJA1049T/1Z
| Chân 1 | TXD — Transmit data input from CAN controller (logic level) |
| Chân 2 | GND — Ground |
| Chân 3 | VCC — 5V supply voltage |
| Chân 4 | RXD — Receive data output to CAN controller |
| Chân 5 | VIO — Logic-level IO supply (TJA1049T/1Z variant: tied to VCC for 5V) |
| Chân 6 | CANL — CAN bus low line |
| Chân 7 | CANH — CAN bus high line |
| Chân 8 | STB — Standby mode control input (active high to enter Standby) |
Ứng dụng tiêu biểu
TJA1049T/1Z phù hợp cho 6 Áp dụngs: 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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
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.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho TJA1049T/1Z — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | 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 |
Bảo phân biệt quan trọng
- Lowest Standby-mode quiescent current in the family for battery-connected nodes (vsTJA1050T)
- 5V-only legacy interface vs. 3V-5V VIO flexibility (vsTCAN1044A-Q1)
- Pure classical CAN vs. CAN FD upgrade (vsTJA1057T/1Z)
Ghi chú thiết kế
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.
Thông tin tuân thủ
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.
