TJA1128GTK/0Z - 85mA LIN SBC with LDO | NXP
料号： TJA1128GTK/0Z ✓ 量产中TJA1128GTK/0Z 概述
A LIN system basis chip is an automotive interface IC that consolidates communication, power management, and basic system-control functions needed around a low-speed LIN network node. In the product hierarchy, a system basis chip sits above a LIN transceiver, integrates an LDO and supervisory functions, and connects vehicle body electronics to a LIN bus. This consolidation can reduce board area and component count while providing a defined interface between the vehicle power network and local electronics.
The TJA1128 combines the LIN transceiver with a regulator capable of supplying 85 mA. Its regulator is available in 3.3 V and 5.0 V output configurations, allowing the same device family to serve different microcontroller supply requirements. The window watchdog supports system monitoring, while two WAKE inputs provide hardware paths for detecting external wake requests. A GPI handles a general logic input, and the HVMPO output provides a high-voltage multipurpose control function for compatible body-electronics loads.
The TJA1128GTK/0Z is identified as an AEC-Q100 automotive-grade device, making it suitable for electronic control-unit designs requiring automotive qualification. Its 14-HVSON package supports compact surface-mount layouts while exposing the communication, supply, wake, monitoring, and control functions required by a LIN node. The manufacturer product page describes operation in very low-power system states, supporting battery-conscious automotive applications where standby current and wake behavior are important.
Typical uses include LIN-controlled door modules, seat controls, climate-control panels, body-control nodes, lighting controllers, sensor interfaces, and compact automotive actuator controllers. In these systems, the TJA1128 can manage communication with a LIN master while supplying a local microcontroller from the vehicle battery. Wake inputs allow external switches or sensors to return the node from a low-power condition without requiring continuous operation of the complete controller.
For PCB design, place the LIN transceiver and regulator support networks close to their associated pins, provide the required input and output capacitance, and route the LIN connection away from sensitive analog or high-speed digital signals. Confirm the exposed-pad connection, thermal pad implementation, ground strategy, and automotive ESD requirements against the manufacturer datasheet and reference layout before production release.
This product page combines manufacturer specifications, package information, sourcing guidance, design notes, and verified drop-in alternatives. It emphasizes the 85 mA regulator capability, integrated LIN interface, watchdog, wake-up inputs, GPI, HVMPO, and 14-HVSON footprint so engineers can assess both electrical suitability and PCB compatibility before selecting the device.
直接替换替代料： TJA1128GTK/0Z ——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： TJA1128GTK/0Z （相同外形与封装尺寸） ——差异在于 General-Purpose Inputs, High-Voltage Multipurpose Outputs, Product Type, Automotive Qualification, Mounting Type.
该产品暂无直接替换替代料。
请求替代料TJA1128GTK/0Z 规格参数
| Product Type | LIN mini system basis chip with integrated voltage regulator |
| LIN Interface | 1 LIN transceiver, half duplex |
| Integrated Regulator | Low-dropout voltage regulator |
| Regulator Output Options | 3.3 V or 5.0 V |
| Regulator Output Current | Up to 85 mA |
| Watchdog | 1 window watchdog |
| Wake Inputs | 2 WAKE inputs |
| General-Purpose Inputs | 1 GPI input |
| High-Voltage Multipurpose Outputs | 1 HVMPO output |
| 封装 | 14-HVSON, 3 mm x 4.5 mm |
| 安装类型 | Surface-mount |
| Automotive Qualification | AEC-Q100 |
TJA1128GTK/0Z 14-hvson, 3 mm x 4.5 mm 引脚配置指南
TJA1128GTK/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： TJA1128GTK/0Z.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TJA1128GTK/0Z 适用于 6 应用s: Automotive LIN Body-Control Node, Door-Control Module, Seat and Climate-Control Interface, Automotive Lighting Controller, Battery-Powered Sensor Interface, Automotive Climate-Control Panel.
Automotive LIN Body-Control Node
The TJA1128GTK/0Z fits compact LIN body-control nodes because it combines the bus transceiver, regulator, watchdog, and auxiliary control functions in one 14-HVSON device. Its 3.3 V or 5.0 V regulator output and 85 mA capability can power a local automotive microcontroller and limited peripherals. The half-duplex LIN interface handles communication with the vehicle master, while the window watchdog, two WAKE inputs, GPI, and HVMPO support monitoring and local I/O without requiring several separate interface ICs.
推荐
Door-Control Module
A door-control module can use the TJA1128GTK/0Z to connect switches, lock actuators, and local controller logic to a LIN network. The integrated LDO provides a regulated rail with up to 85 mA output for the controller, while the HVMPO provides a high-voltage multipurpose output for compatible loads. The two WAKE inputs can detect user activity, and the window watchdog adds monitoring for a safety-relevant electronic control unit operating across automotive temperature and voltage conditions.
推荐
Seat and Climate-Control Interface
Seat and climate-control panels benefit from consolidating several low-speed functions into one LIN node. The TJA1128GTK/0Z supplies either a 3.3 V or 5.0 V local rail, supports up to 85 mA for controller electronics, and communicates through the LIN transceiver. Its compact 3 mm by 4.5 mm 14-HVSON package is useful where board area is constrained, while the GPI and HVMPO provide additional control paths for switches, indicators, or compatible peripheral loads.
推荐
Automotive Lighting Controller
The TJA1128GTK/0Z can support a LIN-managed lighting node that requires both bus communication and regulated local power. The 85 mA regulator output is appropriate for a small controller and associated logic rather than high-current lighting loads, so an external driver stage remains necessary. The LIN transceiver handles commands from the vehicle master, the window watchdog supervises controller activity, and the HVMPO can serve as a multipurpose output where its electrical limits meet the lamp-driver requirements.
推荐
Battery-Powered Sensor Interface
A compact LIN sensor interface can use the TJA1128GTK/0Z to reduce the number of devices connected to a vehicle battery when the node includes local regulation and wake detection. The regulator supports controller electronics with up to 85 mA, while the WAKE inputs permit a low-power operating strategy. The window watchdog provides a supervisory function for the attached microcontroller, and the small 14-HVSON footprint leaves more board area for sensors, protection, or an external interface stage.
推荐
Automotive Climate-Control Panel
A climate-control panel commonly combines LIN communication with local buttons, indicators, and a low-power microcontroller. The TJA1128GTK/0Z provides the LIN physical layer, a selectable 3.3 V or 5.0 V regulator output up to 85 mA, a window watchdog, two wake inputs, a GPI, and an HVMPO. This consolidation simplifies the panel's interface circuitry while preserving dedicated paths for human-input detection and peripheral control. Layout should preserve clean LIN routing and provide the external networks specified by the manufacturer datasheet.
推荐
推荐产品汇总
工程参考数据： TJA1128GTK/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 |
|---|---|
| Package | 14-HVSON, 3 mm x 4.5 mm |
| Brand | NXP Semiconductors |
| Product Type | LIN mini system basis chip |
| LIN Transceiver Count | 1 half-duplex LIN transceiver |
| Integrated Regulator | 3.3 V or 5.0 V LDO |
| Regulator Output Current | Up to 85 mA |
| Window Watchdog | 1 window watchdog |
| WAKE Inputs | 2 |
| General-Purpose Input | 1 GPI |
| High-Voltage Multipurpose Output | 1 HVMPO |
| Automotive Qualification | AEC-Q100 |
关键差异点
- Combines five major functions in one LIN node device （对比 Discrete LIN transceiver architecture)
- Supports two regulated supply levels within the device family （对比 Fixed-output discrete regulator)
- Compact package for space-constrained body electronics （对比 Larger multi-package discrete implementation)
- Automotive qualification aligned with LIN applications （对比 TJA1441AT/0Z)
设计说明
Follow the manufacturer datasheet layout for the 14-HVSON package, including the exposed-pad connection and recommended copper area. Place the LIN transceiver and regulator support components close to their corresponding pins to minimize loop area and preserve signal integrity. Route the LIN connection as a controlled automotive bus trace with appropriate protection components, while keeping switching nodes, motor outputs, and high-current load paths away from the transceiver region.
Use the 85 mA regulator rating as the maximum design objective and verify the actual load current, line-drop margin, startup behavior, and thermal conditions at the intended battery voltage. The LDO can provide either 3.3 V or 5.0 V depending on the exact device variant, so verify the ordering code before fixing the regulator configuration in the schematic. Confirm all capacitor values and ESR or stability requirements from the NXP datasheet rather than substituting generic values.
Do not assume that related TJA1128 suffix codes are drop-in replacements. The TJA1128ATK/0Z and TJA1128ETK/0Z appear in family comparison records, but the available records do not conclusively establish identical package dimensions, pinout, regulator configuration, or temperature grade. For a direct substitution, compare every pin, the exposed pad, absolute maximum ratings, watchdog timing, WAKE behavior, GPI, HVMPO, and regulator output against the manufacturer documentation.
Treat the WAKE inputs as potentially sensitive high-impedance nodes. Keep their traces short, protect them from moisture and contamination, and observe the input thresholds and external configuration shown in the manufacturer datasheet. Maintain separation from LIN edge-rate transitions and noisy power stages. A deliberate ground reference and short return paths will improve repeatability in vehicle electrical environments where switching transients and electrostatic discharge are common concerns.
Calculate regulator dissipation from the actual battery-to-regulator voltage difference and the measured local load rather than from the 85 mA output rating alone. Keep copper away from areas that cannot support heat dissipation, and verify the exposed-pad thermal design using the manufacturer package information. The SBC integrates power management with communication logic, so thermal assessment should cover both steady-state regulator loss and transient load behavior across the vehicle operating range.
合规信息
The product is identified as AEC-Q100 automotive-grade in the Arrow product listing. The listing indicates that lead-free and RoHS information is associated with the part, but it does not explicitly state the resulting compliance status.