TJA1128BTK/0Z - LIN SBC with 85mA LDO | NXP
N.º da peça: TJA1128BTK/0Z ✓ AtivoTJA1128BTK/0Z Visão geral
A LIN system basis chip, or SBC, is an automotive interface IC that consolidates a communication transceiver with local power regulation and supervisory functions. The TJA1128 belongs to the broader system basis chip hierarchy, combining a LIN transceiver, LDO linear regulator, watchdog timer, wake-up logic, and high-voltage I/O in one device. This integration reduces the number of separate components required in a LIN slave or compact automotive control node.
The TJA1128BTK/0Z integrates two WAKE inputs, one general-purpose input, and one high-voltage multipurpose output alongside its LIN transceiver. Its window watchdog monitors controller execution and can initiate a system recovery when expected activity is absent. The 85 mA regulator capacity supports low-power microcontrollers and associated peripherals, while the very-low-power operating modes help reduce standby consumption in parked vehicles.
Automotive system-basis designs require careful separation between battery-backed supply domains, communication interfaces, and low-power wake-up logic. The TJA1128 combines these functions behind a common device-control structure, reducing component count and simplifying software integration. Its 14-HVSON package also requires careful PCB layout and exposed-pad thermal management to maintain reliable operation across automotive temperature conditions.
Typical uses include LIN-controlled door modules, seat and window controllers, body-control nodes, climate-control interfaces, sensor hubs, and small actuator controllers. A LIN slave can use the integrated transceiver to communicate with a vehicle network, the LDO to power a local microcontroller, and the wake-up inputs to return from a low-power state without keeping the entire node continuously active.
When designing the PCB, place input, output, and decoupling capacitors close to their associated pins, preserve the package land pattern exactly, and provide adequate copper around the exposed pad. Confirm that the selected regulator-output option satisfies the controller voltage, and validate the watchdog and wake-up timing against the vehicle-network sleep and wake strategy. The manufacturer datasheet should govern final pin assignment, decoupling values, and layout constraints.
This product page combines the manufacturer's functional description with practical guidance for LIN nodes, regulator selection, watchdog configuration, thermal layout, and same-package alternatives. It helps engineers distinguish the TJA1128 from a standalone LIN transceiver while keeping the design focused on a compact automotive system-basis architecture.
Alternativas drop-in para TJA1128BTK/0Z — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
TJA1128BTK/1Z
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TJA1128FTK/0Z
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TJA1128HTK/0Z
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
TJA1128FTK/1Z
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
TJA1128HTK/1Z
✅ Drop-In ⚠️ Especificações não verificadas📋 Alternativa de referência (fora do catálogo)
TJA1128BTK/0Z Especificações
| Product Type | LIN mini system basis chip |
| LIN Transceiver | Integrated |
| Integrated Voltage Regulator | 3.3 V or 5.0 V output option |
| Regulator Architecture | Low-dropout voltage regulator |
| Regulator Output Current | 85 mA |
| Window Watchdog | Integrated |
| WAKE Inputs | 2 inputs |
| General-Purpose Input | 1 input |
| High-Voltage Multipurpose Output | 1 HVMPO output |
| System Control Functions | Integrated |
| Low-Power Operation | Very low-power modes |
| Encapsulamento | 14-HVSON, 3 x 4.5 mm |
| Tipo de montagem | Surface mount |
| Automotive Application | LIN-connected automotive electronic control units |
Guia de Configuração de Pinos do TJA1128BTK/0Z 14-hvson, 3 x 4.5 mm
Configuração de pinos para TJA1128BTK/0Z (pacote 14-hvson, 3 x 4.5 mm). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para TJA1128BTK/0Z.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
TJA1128BTK/0Z é adequado para 6 aplicaçãos: Automotive LIN Door Modules, Seat and Comfort Control Modules, Climate-Control Sensor Hubs, LIN Actuator Controllers, Body-Control Peripheral Nodes, Compact Automotive Sensor Hubs.
Automotive LIN Door Modules
The TJA1128BTK/0Z fits compact door-lock, window, mirror, and ambient-lighting modules that communicate over LIN. Its integrated LIN transceiver removes the need for a separate bus transceiver, while the 3.3 V or 5.0 V regulator-output options can power a local microcontroller and peripheral circuitry up to the 85 mA regulator limit. Two WAKE inputs allow the node to detect external activity while operating in a low-power state. The window watchdog adds deterministic supervision for a controller that must remain responsive to vehicle-network commands. Use the exact pin assignment, exposed-pad layout, and capacitor arrangement from the NXP data sheet when laying out the module.
Recomendado
Seat and Comfort Control Modules
Seat-position, heating, ventilation, and memory controllers commonly need a low-power network interface alongside local regulation. The TJA1128BTK/0Z combines a LIN transceiver with a regulator capable of supplying 85 mA, allowing a compact controller to manage switches, sensors, and communication without several separate support ICs. Its two WAKE inputs can detect switches or activity lines, while the window watchdog monitors expected controller service. The choice between 3.3 V and 5.0 V regulator output should follow the logic and sensor requirements of the seat module. Validate low-power current and wake timing across the complete vehicle sleep cycle before production release.
Recomendado
Climate-Control Sensor Hubs
The TJA1128BTK/0Z can support compact climate-control sensor hubs that combine LIN communication with local regulated power. Its 85 mA output capacity is appropriate for a low-power controller, communication circuitry, and a limited number of sensors, subject to the regulator's thermal and dropout limits. The window watchdog provides a recovery mechanism if the main controller stops servicing the hub, while the dedicated WAKE inputs support activity-based wake-up from the vehicle network. Choose the regulator-output option to match the sensor interface and controller supply. Confirm the permitted ambient range and operating limits against the climate-control module's location in the vehicle.
Recomendado
LIN Actuator Controllers
Small LIN actuator controllers for pumps, valves, motor latches, and motor locks benefit from combining communication and power management in one device. The TJA1128BTK/0Z handles the LIN physical-layer interface, supplies up to 85 mA for local control electronics, and provides a window watchdog for supervisory protection. External transistors or drivers remain necessary when the actuator requires current or voltage beyond the TJA1128's regulator and multipurpose-output ratings. The integrated high-voltage multipurpose output can support suitable low-level signaling, but its electrical limits must be checked against the actuator interface. Use the manufacturer application guidance to determine whether an additional driver is needed.
Recomendado
Body-Control Peripheral Nodes
The TJA1128BTK/0Z is appropriate for small body-control peripheral nodes that need to wake selectively, communicate over LIN, and supervise their local controller. Its integrated regulator reduces the number of power-support components, while the two WAKE inputs and very-low-power operating modes help manage standby consumption. The window watchdog can detect a frozen application and support a safe recovery sequence, which is important for switches and motor-related peripherals. The 85 mA regulator capability must include controller, interface, pull-up, and actuator-driver currents with appropriate margin. Review the regulator thermal condition at the maximum expected ambient temperature and vehicle transient environment.
Recomendado
Compact Automotive Sensor Hubs
A LIN-connected sensor hub can use the TJA1128BTK/0Z as both its network interface and local power supply. The 3.3 V or 5.0 V regulator-output options support different sensor and controller combinations, and the 85 mA rating covers modest sensing and processing loads. The window watchdog helps the host controller remain synchronized with expected service, while the WAKE inputs permit demand-driven activation. This integration is especially useful where connector space is constrained and every additional component increases board area. The exact regulator option, input capacitance, output capacitance, exposed-pad thermal path, and wake timing must be validated against the NXP TJA1128 data sheet.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para TJA1128BTK/0Z — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | TJA1128BTK/1Z | TJA1128FTK/0Z | TJA1128HTK/0Z |
|---|---|---|---|---|
| Product Type | LIN mini system basis chip | LIN mini system basis chip | LIN mini system basis chip | LIN mini system basis chip |
| Brand | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors | NXP Semiconductors |
| Package | 14-HVSON (3 x 4.5 mm) | 14-HVSON (3 x 4.5 mm) - same | 14-HVSON (3 x 4.5 mm) - same | 14-HVSON (3 x 4.5 mm) - same |
| Integrated LIN Transceiver | Yes | Yes | Yes | Yes |
| Regulator Output Current | 85 mA | 85 mA | 85 mA | 85 mA |
| Regulator Output Options | 3.3 V or 5.0 V | 3.3 V or 5.0 V family options | 3.3 V or 5.0 V family options | 3.3 V or 5.0 V family options |
| Window Watchdog | Integrated | Integrated | Integrated | Integrated |
| WAKE Inputs | 2 inputs | 2 inputs | 2 inputs | 2 inputs |
| General-Purpose Input | 1 input | 1 input | 1 input | 1 input |
| High-Voltage Multipurpose Output | 1 output | 1 output | 1 output | 1 output |
| Low-Power Operating Modes | Supported | Supported | Supported | Supported |
Principais diferenciais
- Integrates the complete local LIN-node support chain (vs TJA1057GTKZ)
- Provides local regulated power for controller electronics (vs Standalone LIN transceiver designs)
- Adds deterministic supervisory behavior to the network interface (vs Basic LIN transceivers)
- Supports demand-driven low-power node operation (vs Continuously powered interface designs)
Notas de projeto
Use the NXP TJA1128 14-HVSON land pattern exactly, including the exposed-pad geometry, solder-mask clearance, paste stencil, and exposed-pad via arrangement. Place regulator input and output capacitors directly beside their associated pins to minimize high-frequency loop area. The LIN transceiver, wake inputs, and general-purpose input are sensitive to external return paths; route vehicle-bus and wake traces away from switching nodes and keep ground returns short and continuous.
The 85 mA regulator rating must be evaluated with actual VIN-to-VOUT dissipation rather than treated as a universal load capability. Estimated: with a 5 V output and 85 mA load, regulator dissipation is VIN multiplied by 0.085 A minus 5 V multiplied by 0.085 A. Calculate the result using the minimum valid battery-side input during worst-case operation, then verify junction temperature using the exposed-pad copper area and the manufacturer thermal information.
Separate average load current from transient load current when sizing the local power budget. The 85 mA regulator output is a family-level maximum, while the LDO also needs sufficient input-to-output headroom, appropriate output capacitance, and acceptable thermal dissipation. Include the microcontroller, LIN transceiver, pull-ups, sensors, LEDs, and actuator-driver control currents in the worst-case budget rather than evaluating only the standby load.
Do not interchange ordering suffixes solely because the package drawing matches. The TJA1128 family can offer 3.3 V and 5.0 V regulator-output configurations, and other code differences may affect temperature grade or packing. Confirm the exact ordering table, pin description, watchdog timing, wake behavior, and reel orientation for the replacement MPN before approving it for an existing PCB.
Keep the LIN bus connection short and route it as a controlled communications trace according to the NXP application guidance. Provide the specified bus-interface network and maintain suitable separation from motor, relay, and inductive actuator switching paths. The WAKE and GPI inputs should have deliberate input conditioning so that vehicle transients, leakage, and adjacent harness signals do not cause false wake events.
Informações de conformidade
The TJA1128 is described by NXP as an automotive system basis chip, but specific RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals statements are not stated in the cited product text.
