TJA1145T/FDJ - High-Speed CAN FD Transceiver w/ Partial Networking
料号： TJA1145T ✗ 停产| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.59 | $1.59 |
| 10 | $1.43 | $14.30 |
| 100 | $1.27 | $127.00 |
| 500 | $1.12 | $560.00 |
| 1,000 | $0.95 | $950.00 |
TJA1145T 概述
A CAN transceiver is a physical-layer interface that connects a CAN protocol controller to the differential CAN bus, providing differential transmit/receive signaling, bus fault protection, and electromagnetic immunity. The TJA1145T belongs to the NXP TJA1145 family, which integrates ISO 11898-6 selective wake-up logic ('partial networking') so an ECU can ignore CAN traffic while monitoring the bus for a designated wake-up frame, dramatically reducing quiescent current in always-connected body-electronics ECUs.
Key features include autonomous bus biasing per ISO 11898-6:2013, an FD-passive mode that ignores CAN FD frames during Sleep/Standby to avoid false wake-ups, low-power Sleep and Standby modes, and an INH (inhibit) output for controlling an external voltage regulator. The 14-SO package provides a small footprint suitable for body-control, gateway, and cluster modules.
The TJA1145T/FDJ uses an ISO 11898-6 selective-wake architecture that combines a low-power wake receiver with the high-speed CAN data path. When the host microcontroller commands Sleep mode, the data path shuts down while the wake receiver remains active; only a matching CAN-ID frame wakes the ECU, allowing significant quiescent-current savings versus traditional always-on transceivers.
Typical applications include automotive body-control modules (BCM), gateway ECUs, instrument clusters, and ADAS sensor nodes where selective wake-up minimizes parasitic battery drain. The 'T' suffix identifies this specific variant within the TJA1145 family (distinct from TJA1145 and TJA1145A), and the '/FD' suffix denotes CAN FD passive support.
When designing with this part, ensure the bus termination (typically 120 ohm at each end of the CAN bus segment) is correctly applied and that the INH pin is used to control an external LDO if low quiescent current is required. Note that TJA1145T is approaching end-of-life; verify current lifecycle status with NXP before committing to new designs.
This page synthesizes NXP datasheet excerpts, distributor pricing and stock, drop-in variants from the same TJA1145 family, and practical design notes not consolidated in the manufacturer datasheet alone.
直接替换替代料： TJA1145T ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
TJA1145AT/FD
✅ 直接替换📋 参考替代料（不在目录中）
TJA1145TK/FD
✅ 直接替换📋 参考替代料（不在目录中）
TJA1145ATK/FD
✅ 直接替换📋 参考替代料（不在目录中）
TCAN1145-Q1
✅ 直接替换📋 参考替代料（不在目录中）
TJA1145T 规格参数
| Protocol | CAN, CAN FD (FD-passive) |
| Number of Drivers/Receivers | 1/1 |
| Duplex | Half |
| Data Rate (max) | 2 Mbit/s |
| Supply Voltage (VCC) | 4.5 V to 5.5 V |
| ISO Standards Compliance | ISO 11898-2:2003, ISO 11898-5:2007, ISO 11898-6:2013 |
| 封装 | 14-SOIC (SOT108-1) |
| 安装类型 | Surface Mount |
| Partial Networking | Yes (selective wake-up per ISO 11898-6) |
| Autonomous Bus Biasing | Yes (per ISO 11898-6:2013) |
| Low-Power Modes | Sleep, Standby |
| INH Output | Yes (controls external voltage regulator) |
| Packing | Reel-Reel 13" (Q1 NDP) |
| RoHS 状态 | Compliant (per DigiKey listing) |
TJA1145T 引脚配置
| 引脚 1 | TXD — Transmit data input from CAN controller |
| 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 — I/O supply for digital pins (variant dependent) |
| 引脚 6 | EN — Enable control input |
| 引脚 7 | INH — Inhibit output to external voltage regulator |
| 引脚 8 | WAKE — Local wake input |
| 引脚 9 | STB — Standby mode control input |
| 引脚 10 | CANL — CAN low-level bus line |
| 引脚 11 | CANH — CAN high-level bus line |
| 引脚 12 | SPLIT — Stabilization output for bus biasing (variant dependent) |
| 引脚 13 | VBAT — Battery supply input |
| 引脚 14 | NC — Not connected (per datasheet) |
典型应用
TJA1145T 适用于 6 应用s: Automotive Body Control Module (BCM), CAN Gateway ECU, Instrument Cluster Node, ADAS Sensor Node (CAN interface), Industrial CAN Communication Module, EV Battery Management CAN Node.
Automotive Body Control Module (BCM)
The TJA1145T/FDJ fits automotive BCM designs because its ISO 11898-6 selective wake-up enables an always-attached ECU to ignore non-wake CAN traffic, drastically reducing quiescent current on the 12V battery. The 1 Mbit/s classic-CAN and 2 Mbit/s CAN FD support covers BCM bus segments including lighting, door, and seat modules. Compared with discrete wake receivers, the integrated partial-networking block saves PCB area in 14-SO. Designers should use the INH output to switch a downstream 5V LDO off in Sleep mode for additional quiescent savings.
推荐
CAN Gateway ECU
The TJA1145T/FDJ is well-suited to automotive gateway ECUs that bridge CAN/CAN FD subnets between body, chassis, and powertrain domains. Its ISO 11898-2 and ISO 11898-5 compliance supports mixed classic-CAN and CAN FD traffic at data rates up to 2 Mbit/s. Autonomous bus biasing per ISO 11898-6:2013 lets the gateway node handle bus failures without external biasing. The 14-SO footprint keeps the high-channel-count gateway layout compact, and the Sleep/Standby modes plus INH output allow the gateway to be commanded into a low-quiescent state when the vehicle is parked.
推荐
Instrument Cluster Node
The TJA1145T/FDJ serves automotive instrument clusters where it must tolerate 12V battery transients and wake from CAN bus messages upon vehicle access. Its 4.5V to 5.5V VCC range aligns with the 5V LDO rails commonly used in cluster electronics, and its low-power Sleep mode reduces parasitic drain while the vehicle is parked. The differential CAN bus is inherently EMI-immune, an advantage in clusters located near the dashboard antenna and infotainment harnesses. Pair the TJA1145T with a low-quiescent LDO and a 5V-tolerant cluster MCU for a robust front-end.
推荐
ADAS Sensor Node (CAN interface)
The TJA1145T/FDJ can be deployed in ADAS sensor nodes that communicate over CAN FD, including surround-view, radar, and ultrasonic ECUs that require selective wake to reduce quiescent current. Its 2 Mbit/s CAN FD support is sufficient for radar and surround-view payload sizes used in current production vehicles. The integrated partial networking ensures that an ADAS sensor only wakes when its specific CAN-ID is addressed, minimizing aggregate battery drain across a sensor-rich vehicle. The 14-SO package fits the compact sensor housing constraints typical of ADAS modules.
推荐
Industrial CAN Communication Module
Outside automotive, the TJA1145T/FDJ also fits industrial CANopen and DeviceNet modules where selective wake and low quiescent current reduce maintenance overhead for battery-backed field nodes. The 4.5V to 5.5V VCC range matches typical 5V industrial backplanes and isolated DC-DC converters. CAN FD at 2 Mbit/s enables higher data throughput for vision and motion-control peripherals. The 14-SO surface-mount package supports reflow soldering in industrial-grade production lines, while the ISO 11898-6 autonomous biasing tolerates bus faults in noisy factory environments.
推荐
EV Battery Management CAN Node
The TJA1145T/FDJ is appropriate for the CAN communication node inside an EV battery management system, where it must remain selectively connected to the vehicle CAN bus for diagnostics without draining the high-voltage pack. Its Sleep mode quiescent current and partial-networking wake-up reduce BMS parasitic loss when the vehicle is parked. The 14-SO package supports the compact BMS housing dimensions typical of module-mounted designs. The 2 Mbit/s CAN FD rate supports the data-intensive cell-monitoring traffic required by modern lithium-ion packs.
推荐
推荐产品汇总
工程参考数据： TJA1145T ——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 | TJA1145AT/FD | TJA1145TK/FD | TJA1145ATK/FD | TCAN1145-Q1 |
|---|---|---|---|---|---|
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | Texas Instruments |
| Package | 14-SOIC (SOT108-1) | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same | 14-SOIC - same |
| Lifecycle Status | NRND | Active (recommended for new designs) | NRND | Active | Active |
| Data Rate (max) | 2 Mbit/s | 2 Mbit/s | 2 Mbit/s | 2 Mbit/s | 2 Mbit/s |
| ISO 11898-6 Partial Networking | Yes | Yes | Yes | Yes | Yes |
| Automotive Grade (AEC-Q100) | No (industrial grade) | No (industrial grade) | Yes (TK suffix = automotive) | Yes (AEC-Q100) | Yes (Q1 suffix = AEC-Q100) |
关键差异点
- Integrated ISO 11898-6 selective wake-up partial networking （对比 TCAN1145-Q1)
- A-revision successor TJA1145AT/FD with active lifecycle status （对比 TJA1145AT/FD)
- Automotive-grade AEC-Q100 variant in same package （对比 TJA1145ATK/FD)
设计说明
Use the INH output to switch an external 5V LDO so that the downstream MCU rail collapses in Sleep mode. This minimizes quiescent current at the system level beyond what the TJA1145T itself achieves. Estimated: a typical 5V LDO at 50 uA quiescent adds significantly to total standby current, so LDO selection matters as much as transceiver selection for always-attached ECUs.
TJA1145T/FD is NRND per the NXP community thread 'TJA1145T Replacement'. Do not start new automotive designs with this part - use TJA1145AT/FD or TJA1145ATK/FD instead. The NRND status reflects NXP's transition to the A-revision, not an immediate discontinuation, but new designs should avoid building around parts that are not recommended for new designs.
Route CANH and CANL as a 100-ohm differential pair with matched lengths to within 1mm. Place a 120-ohm termination resistor at each end of the CAN bus segment per ISO 11898-2, and keep the bus stub length below 1/10 of the signal rise time for reliable operation at 2 Mbit/s. Decouple VCC with a 100 nF ceramic capacitor placed within 2mm of the IC pin.
合规信息
RoHS compliance confirmed via DigiKey listing. TJA1145T base part is industrial grade; the TK-suffix variant (TJA1145TK/FD) is AEC-Q100 qualified for automotive. TJA1145T/FD is NRND per NXP community discussion - use TJA1145ATK/FD for new automotive designs.
