TJA1128DTK/0Z - LIN SBC with 85 mA LDO | NXP
料号： TJA1128DTK/0Z ✓ 量产中TJA1128DTK/0Z 概述
A LIN system basis chip, or SBC, combines the physical-layer transceiver with power-management and supervisory functions needed for a LIN node. In the broader hierarchy, a LIN SBC is an interface IC that connects a low-speed serial network to an automotive electronic control unit. Its integrated LDO, watchdog, wake-up logic, and system-control functions reduce the number of discrete components required around a LIN-compatible microcontroller.
The TJA1128's principal functions include LIN signal transmission and reception, an 85 mA LDO, a window watchdog, two WAKE inputs, one GPI, and one HVMPO output. The 3.3 V and 5.0 V regulator choices let the same device family support automotive systems with different microcontroller supply requirements. Its integration is particularly useful when component count, board area, or standby-system simplicity is more important than implementing every function separately.
The window watchdog supervises the software execution interval expected by the host microcontroller, while the WAKE inputs support wake-up behavior in distributed vehicle networks. The GPI provides an additional logic input, and the HVMPO output provides a high-voltage-capable output function for system control. These resources allow a compact LIN node to handle both communication and supervisory tasks without duplicating the functions in separate discrete devices.
Typical uses include LIN-controlled automotive body modules, seat and door control units, climate-control interfaces, sensor gateways, lighting controllers, and other electronic modules that exchange data over a LIN bus. The device is particularly appropriate where the node requires a local regulated supply, autonomous bus wake-up, fault supervision, and a compact surface-mount footprint.
When designing the circuit, preserve the published decoupling and external-component requirements, route the LIN connection as a controlled network interface, and validate wake-up and watchdog timing for the complete network. The regulator's 85 mA capability must cover the microcontroller, wake logic, communications load, and any external peripherals with margin for transient automotive supply conditions.
This product guide combines the manufacturer's functional description with practical system-basis-chip design guidance, application analysis, package constraints, and qualified drop-in comparison points. It helps engineers determine whether the TJA1128 integrates the required LIN, power, watchdog, and wake-up functions before committing a board layout.
直接替换替代料： TJA1128DTK/0Z ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
TJA1128DTK/1Z
✅ 直接替换📋 参考替代料（不在目录中）
TJA1128HTK/0Z
✅ 直接替换联系询价
查看数据手册 →TJA1128DTK/0Z 规格参数
| Product Type | LIN mini system basis chip (SBC) |
| Integrated Functions | LIN transceiver, LDO, window watchdog, 2 WAKE inputs, GPI, and HVMPO output |
| LIN Communication | LIN transceiver with 1 transmitter and 1 receiver |
| Regulator Topology | Low-dropout voltage regulator (LDO) |
| Regulator Output Options | 3.3 V or 5.0 V |
| Regulator Maximum Output Current | 85 mA |
| WAKE Input Count | 2 inputs |
| General-Purpose Input Count | 1 input |
| High-Voltage Multipurpose Output Count | 1 output |
| Watchdog Type | Window watchdog |
| 封装 | 14-HVSON, 3 x 4.5 mm |
| 安装类型 | Surface mount |
| Application Domain | Automotive electronics |
| Bus Standard | LIN |
| RoHS 状态 | Compliant |
TJA1128DTK/0Z 14-hvson, 3 x 4.5 mm 引脚配置指南
TJA1128DTK/0Z（14-hvson, 3 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： TJA1128DTK/0Z.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TJA1128DTK/0Z 适用于 6 应用s: Automotive LIN Body Modules, LIN Seat and Comfort Control, Automotive Sensor Gateway, Vehicle Lighting Controller, LIN Climate-Control Interface, Door and Switch Module.
Automotive LIN Body Modules
The TJA1128DTK/0Z suits compact body-control modules that require a local 3.3 V or 5.0 V rail, LIN communication, and autonomous supervisory behavior. Its 85 mA LDO can power a microcontroller and selected peripherals, while the window watchdog monitors expected software execution and the two WAKE inputs support network wake-up. Integrating these functions in a 14-HVSON package measuring 3 x 4.5 mm reduces discrete count and conserves PCB area in distributed door, seat, lighting, and body-interface modules.
推荐
LIN Seat and Comfort Control
Seat-position, climate, and comfort modules often combine LIN communication with local sensing and actuator-control functions. The TJA1128DTK/0Z provides the physical LIN interface plus a regulator capable of supplying 85 mA, reducing the need for a separate supply controller in space-constrained modules. Its GPI and HVMPO resources can support auxiliary control functions, and the window watchdog provides a hardware timeout for safety-related monitoring of the controlling firmware.
推荐
Automotive Sensor Gateway
A LIN-connected sensor gateway benefits from combining the bus transceiver and local regulated supply in one device. The TJA1128DTK/0Z can provide up to 85 mA for a gateway controller, its GPI can accept a discrete logic condition, and its HVMPO output adds a controllable system function. The window watchdog detects missing or delayed controller responses, while dual WAKE inputs support low-power network nodes that must respond to remote bus activity without keeping every subsystem continuously powered.
推荐
Vehicle Lighting Controller
Compact lighting modules can use the TJA1128DTK/0Z to combine LIN command reception with local regulated power for a small controller and logic. The 3.3 V or 5.0 V regulator options support different controller supply architectures, and the 85 mA output rating accommodates low-power automotive logic rather than high-current LED drivers directly. The window watchdog and wake-up inputs improve supervisory behavior while the 3 x 4.5 mm package supports compact lamp and switch assemblies.
推荐
LIN Climate-Control Interface
Climate-control nodes often act as LIN masters or slaves while supervising a local microcontroller. The TJA1128DTK/0Z integrates the LIN transceiver with an 85 mA LDO, making it appropriate for the interface electronics that connect a controller to the vehicle network. The window watchdog can detect controller stalls, two WAKE inputs support distributed power management, and the small HVSON package helps accommodate the environmental-control module's limited PCB area.
推荐
Door and Switch Module
Door controls, central locking modules, and multiplexed switch assemblies benefit from a compact interface IC that handles both network communication and local regulation. The TJA1128DTK/0Z provides a LIN transceiver, 3.3 V or 5.0 V LDO capability, two wake-up inputs, a GPI, and an HVMPO output in one 14-HVSON package. The 85 mA regulator rating is appropriate for a small local controller and logic load, while the watchdog adds monitoring without requiring a separate supervisor IC.
推荐
推荐产品汇总
工程参考数据： TJA1128DTK/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 | TJA1128DTK/1Z | TJA1128HTK/0Z |
|---|---|---|---|
| Package | 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 |
| Product Type | LIN mini system basis chip | System basis chip | Functionally equivalent LIN mini system basis chip |
| LIN Interface | 1/1 LIN transceiver | LIN transceiver | LIN transceiver |
关键差异点
- Combines five system functions with the LIN interface （对比 TJA1128DTK/1Z)
- Supports two local regulated-output choices （对比 TJA1128HTK/0Z)
- Consolidates discrete automotive interface functions （对比 TJA1128DTK/1Z)
设计说明
Route the LIN transceiver connection according to the NXP TJA1128 datasheet layout guidance, including the prescribed LIN bus components and protection arrangement. Place the regulator input and output capacitors directly at their designated package pins, connect the exposed pad to the recommended ground-plane structure, and keep high-current and high-voltage automotive return paths away from sensitive wake-up and GPI traces. Verify the final stackup and exposed-pad geometry against the manufacturer package drawing before release.
The 85 mA regulator rating must be treated as a system-output limit, not as additional capacity available to every attached load. Add the microcontroller, transceiver, sensors, indicators, and pull-up or bias currents, then preserve startup margin for transient loads. Select the 3.3 V or 5.0 V output variant against the controller requirement and check the resulting thermal dissipation at the vehicle battery's maximum operating voltage.
Do not substitute on package outline alone. Confirm the complete ordering suffix, output-voltage option, temperature range, LIN electrical limits, watchdog timing, wake-up thresholds, and exposed-pad implementation for any replacement. TJA1128DTK/1Z and TJA1128HTK/0Z are same-brand candidates, but a production change requires comparison against the specific TJA1128DTK/0Z datasheet revision and the vehicle program's qualification requirements.
Keep the WAKE and GPI traces away from noisy switching nodes and route them with controlled return paths to minimize false wake events or logic noise. Use a quiet ground reference for the LDO, watchdog, and digital control functions even though the same package also interfaces with an automotive LIN bus. Review test-point accessibility for wake, watchdog, GPI, HVMPO, and LIN signals so production validation does not require disturbing the final assembly.
合规信息
The product listing identifies the reel-packed TJA1128DTK/0Z as RoHS compliant. No explicit REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals statement was included in the cited product records.
