TJA1128CTK/0Z - LIN SBC with 3.3V LDO | NXP
料号： TJA1128CTK/0Z ✓ 量产中TJA1128CTK/0Z 概述
A LIN mini system basis chip is a mixed-signal interface IC that connects a low-speed LIN network node to an embedded system while providing local power regulation and system monitoring. LIN is a single-wire automotive communication standard used for distributed vehicle functions such as door modules, seat controls, lighting, climate controls, and body controllers. Integrating a LIN transceiver with an LDO and watchdog reduces component count, board area, and the number of separate interconnects required for a network node.
The TJA1128 combines the LIN physical-layer interface with an 85 mA regulator, a window watchdog, two wake inputs, a GPI, and an HVMPO output. These features support distributed vehicle electronics where sleep current, fault recovery, wake detection, and stable local supply voltage are important design priorities. The manufacturer offers regulator configurations for 3.3 V and 5.0 V outputs, with the C variant in this MPN representing the 3.3 V configuration.
Its low-current standby and sleep operating modes are particularly useful in parked vehicles, where a network node must remain able to detect a wake event without continuously loading the vehicle electrical system. The window watchdog adds a time-based supervision function for firmware and external processing elements, while the WAKE and GPI inputs expand the ways the module can react to external signals. The HVMPO output provides a high-voltage-capable output for compatible body-network functions.
Typical applications include LIN-controlled door modules, seat and window controls, climate-control endpoints, lighting controllers, body-control modules, and other distributed automotive electronic nodes. Its combination of communication, regulated auxiliary power, wake detection, and watchdog supervision is particularly useful when an ECU needs a compact interface to a LIN subnetwork rather than a complete standalone controller.
When designing a TJA1128CTK/0Z circuit, reserve filtering and protection for the LIN bus, keep high-current and transient-sensitive paths away from sensitive communication routing, and validate the regulator's thermal behavior at the highest intended auxiliary load. Because the device supports both 3.3 V and 5.0 V regulator configurations across the series, confirm the exact order code and output-voltage option before releasing a production PCB.
This product record combines the manufacturer's functional description, package information, sourcing listings, application guidance, drop-in alternatives, and practical design considerations. It is intended to help engineers identify the correct LIN system basis chip and plan the associated power, wake, watchdog, and bus-interface implementation.
直接替换替代料： TJA1128CTK/0Z ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
TJA1128CTK/1Z
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TJA1128ATK/0Z
✅ 直接替换 ⚠️ 规格未核验联系询价
查看数据手册 →TJA1128ATK/1Z
✅ 直接替换 ⚠️ 规格未核验📋 参考替代料（不在目录中）
TJA1145ATK/0Z
✅ 直接替换📋 参考替代料（不在目录中）
TJA1128CTK/0Z 规格参数
| Product Type | LIN mini system basis chip |
| LIN Transceiver Configuration | 1/1 transceiver |
| Integrated Voltage Regulator | 3.3 V low-dropout regulator |
| Regulator Output Current | Up to 85 mA |
| Window Watchdog | Integrated |
| WAKE Inputs | 2 inputs |
| General-Purpose Input | 1 input |
| High-Voltage Multipurpose Output | 1 HVMPO output |
| Standby and Sleep Modes | Very low-current operating modes |
| 封装 | 14-HVSON, 3 mm x 4.5 mm |
| 安装类型 | Surface mount |
| Moisture Sensitivity Level | MSL 1 |
| Maximum Time at Peak Reflow Temperature | 30 s |
| Peak Reflow Temperature | 260 C |
| Terminal Finish | Nickel palladium gold silver |
| JESD-609 Code | e4 |
| RoHS 状态 | Compliant |
| Automotive Network Standard | LIN, ISO 17987-4 |
TJA1128CTK/0Z 14-hvson, 3 mm x 4.5 mm 引脚配置指南
TJA1128CTK/0Z（14-hvson, 3 mm x 4.5 mm 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TJA1128CTK/0Z.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TJA1128CTK/0Z 适用于 6 应用s: Automotive Door Control Modules, Seat and Window Control ECUs, Climate-Control Endpoint Modules, Automotive Lighting Control Nodes, Body-Control Peripheral Modules, Low-Power Sensor Network Endpoints.
Automotive Door Control Modules
The TJA1128CTK/0Z fits a LIN door-control endpoint that needs both network communication and local auxiliary power. Its 1/1 LIN transceiver connects the module to the vehicle's LIN subnetwork, while the integrated 3.3 V regulator supplies up to 85 mA for sensors, switches, or a small controller. Two WAKE inputs support local activation, and the window watchdog can supervise a periodic service from the attached processor. This integration reduces the number of discrete interface, regulator, and wake components compared with a standalone LIN transceiver arrangement.
推荐
Seat and Window Control ECUs
A LIN-connected seat, window, or mirror module can use the TJA1128CTK/0Z to combine bus communication with local regulation and monitoring. The 85 mA regulator capability is suitable for low-power sensors, switches, logic, or a small local controller, provided the load and thermal budget remain within the device limits. The WAKE inputs allow the module to respond to activity around the vehicle without keeping every function fully active. The window watchdog adds system supervision where a stuck or missed service must be detected.
推荐
Climate-Control Endpoint Modules
The TJA1128CTK/0Z is appropriate for a distributed climate-control endpoint connected through a LIN bus. Its 3.3 V auxiliary output can support low-power sensing and control electronics, while the integrated LIN transceiver handles communication with a central body controller. The device's standby and sleep behavior is valuable in vehicles that spend substantial time parked, and the two WAKE inputs permit activation from local controls. Engineers should budget regulator loading carefully because the internal supply is rated to deliver up to 85 mA rather than a high-current actuator drive.
推荐
Automotive Lighting Control Nodes
A small LIN lighting node can use the TJA1128CTK/0Z to combine the physical bus interface with a regulated local rail and wake capability. The 3.3 V regulator can power logic-level sensing or driver-control electronics up to its 85 mA rating, while the HVMPO output may serve compatible high-voltage-capable logic functions. The window watchdog provides an independent timing reference for periodically serviced firmware. Because lighting modules can encounter electrical transients and substantial ambient temperature variation, protection and thermal validation must be treated as essential part of the design.
推荐
Body-Control Peripheral Modules
The TJA1128CTK/0Z is useful for peripheral body-control nodes that terminate a LIN network and require several local services from one IC. It combines a 1/1 LIN transceiver, a 3.3 V regulator, a window watchdog, two WAKE inputs, one GPI, and one HVMPO output in a 3 mm by 4.5 mm 14-HVSON package. That integration can simplify routing and reduce board area in compact modules. The design should still separate high-current loads from the regulator path and verify that the selected package's exposed-pad connection follows the manufacturer's land pattern and thermal guidance.
推荐
Low-Power Sensor Network Endpoints
The TJA1128CTK/0Z suits a low-power LIN endpoint that combines remote sensing with occasional local control. Its very low-current standby and sleep modes reduce the continuing energy demand of parked vehicle networks, while the WAKE inputs provide local or remote wake paths. The integrated 3.3 V regulator can power suitable sensors and interface logic within the 85 mA limit. The GPI and HVMPO broaden the input and output resources available to the module, and the window watchdog can confirm that expected periodic communication or control activity continues.
推荐
推荐产品汇总
工程参考数据： TJA1128CTK/0Z ——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 | TJA1128CTK/1Z | TJA1128ATK/0Z | TJA1128ATK/1Z | TJA1145ATK/0Z |
|---|---|---|---|---|---|
| Package | 14-HVSON (3 x 4.5 mm) | 14-HVSON (3 x 4.5 mm) | 14-HVSON (3 x 4.5 mm) | 14-HVSON (3 x 4.5 mm) | 14-HVSON (3 x 4.5 mm) |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Product Family | TJA1128 LIN mini system basis chip | TJA1128 LIN mini system basis chip | TJA1128 LIN mini system basis chip | TJA1128 LIN mini system basis chip | TJA1145 LIN-related system basis chip |
| Mounting Type | Surface mount | Surface mount | Surface mount | Surface mount | Surface mount |
关键差异点
- Combines six system functions in one package （对比 TJA1145ATK/0Z)
- Provides a 3.3 V auxiliary rail rated to 85 mA （对比 TJA1128ATK/0Z)
- Closest order-code match retains C-series configuration （对比 TJA1128CTK/1Z)
设计说明
Treat the integrated regulator as an 85 mA auxiliary supply, not as a general-purpose power stage for actuators, LEDs, or motors. Estimate the worst-case auxiliary load, regulator dropout demand, and ambient temperature before assigning current headroom. Place the input capacitor and regulator output capacitor directly at the device pins using the values and layout geometry specified in the NXP datasheet. A local test point on the 3.3 V rail helps distinguish bus faults from regulator or downstream load faults.
Follow the NXP 14-HVSON land pattern and exposed-pad connection exactly, including the package thermal pad and its solder treatment. Maintain short, direct return paths for the LIN transceiver, regulator, and ground pins; long loops can increase susceptibility to coupling from adjacent switching nodes. Use a solid, low-impedance ground plane where the layout rules permit, and place bus protection components near the connector rather than beside the IC. Confirm the assembly stencil and reflow profile for the package's specified peak-reflow conditions.
Do not substitute an A-series TJA1128 order code for the C-series TJA1128CTK/0Z without checking the regulator voltage used by downstream circuitry. The family includes 3.3 V and 5.0 V regulator configurations, so a mechanically matching package does not make every order-code variant electrically interchangeable. Likewise, confirm WAKE thresholds, watchdog timing, sleep-current behavior, and exposed-pad requirements against the manufacturer documentation before approving a substitute.
The LIN bus interface, regulator, wake inputs, and HVMPO output share one compact mixed-signal package. Avoid routing or placing high-current inductive loads beside the device without deliberate separation and return-current planning. In a vehicle network, validate startup during cold conditions, bus recessive and dominant states, wake thresholds, watchdog recovery, and operation with partial supply loading. Use the manufacturer reference application and test guidance as the basis for production validation.
合规信息
RoHS compliance is stated by a product listing. The device is associated with LIN ISO 17987-4. No explicit REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was identified in the provided product information.