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NXP Semiconductors TJA1128GTK/1Z
- Part No.:
- TJA1128GTK/1Z
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TJA1128GTK/1Z.pdf
- Description:
- LIN MINI SYSTEM BASIS CHIP WITH
- Quantity:
- Payment:
- Shipping:
Inventory:4,053
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Product details
Overview
TJA1128GTK/1Z from NXP Semiconductors is a LIN Mini System Basis Chip (SBC) integrating a LIN transceiver, 5.0 V/85 mA LDO regulator, window watchdog, two level-sensitive WAKE inputs, one GPI, and an open-drain HVMPO output - designed for automotive body electronics nodes requiring low-power operation, bus wake-up, and limp-home safety response in 12 V systems.
For engineers reviewing the TJA1128GTK/1Z datasheet, TJA1128GTK/1Z pinout, TJA1128GTK/1Z application, or TJA1128GTK/1Z equivalent, key selection considerations include its AEC-Q100 qualification, ISO 17987-4:2016 LIN compliance, 14 µA SLEEP-mode current, configurable HVMPO function, and HVSON14 thermal-enhanced package with AOI support.
Technical Context
The TJA1128GTK/1Z implements a state-machine–driven system controller supporting nine modes (NORMAL, STANDBY, SLEEP, CONFIG, etc.), with mode transitions governed by EN, STBN, RSTN, and internal thresholds. Its LIN transceiver supports baud rates up to 20 kBd and high-speed mode (>20 kBd) with fast slope control, plus integrated termination for responder applications.
Watchdog operation includes Window, Timeout, and Autonomous modes with microcontroller-independent clocking and selectable periods (16–128 ms). The HVMPO output is programmable via SPI for cyclic wake bias control, limp-home signaling, or GPI-synchronized switching - all configurable in nonvolatile memory with CRC-protected writes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO Output | 5.0 V ±2 %, 85 mA - powers MCU directly; short-circuit proof to GND |
| SLEEP Current | Typ. 14 µA - enables ultra-low-power node sleep with bus/local wake capability |
| LIN Compliance | ISO 17987-4:2016, LIN 2.0–2.2A, SAE J2602 - ensures interoperability in automotive LIN networks |
| Watchdog Modes | Window, Timeout, Autonomous - provides flexible safety monitoring without MCU clock dependency |
| Wake Inputs | WAKE1 & WAKE2 - level-sensitive, edge-selectable, with wake-source recognition |
| HVMPO Function | Configurable open-drain output - supports limp-home, cyclic wake bias, GPI-controlled switching |
| Package | HVSON14 (3.0 × 4.5 × 0.85 mm) - leadless, thermally enhanced, AOI-compatible |
Pinout & Package
HVSON14 package (SOT1086-2), 3.0 mm × 4.5 mm × 0.85 mm body, exposed thermal pad soldered to PCB ground for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXD (SDI) | LIN transmit / SPI data input | Dual-role pin: drives LIN bus in NORMAL mode; accepts SPI config data in CONFIG mode |
| EN (SCK) | Enable / SPI clock | Controls operating mode entry; serves as SPI clock during configuration |
| RSTN | Bidirectional reset | Active-LOW reset I/O with programmable pulse width (4 ms or 700 µs) |
| RXD (SDO) | LIN receive / SPI data output | Outputs LIN data or wake-event flags; returns register reads during SPI access |
| STBN (SCSN) | Standby control / SPI chip select | Mode selection input; active-LOW SPI chip select in CONFIG mode |
| WWD | Watchdog trigger | Accepts external watchdog service pulses; failure triggers limp-home response |
| GPI | General purpose input | Monitors external signals; can control HVMPO output when configured |
| VCC | LDO regulated output | 5.0 V power supply for connected MCU; includes undervoltage detection and reset |
| GND | Ground reference | Common return path; thermal pad must be soldered to PCB ground plane |
| LIN | LIN bus interface | Analog I/O with ±43 V fault tolerance, K-line compatibility, and integrated termination |
| BAT | Battery supply input | Accepts 5–28 V; load-dump protected to 43 V; powers internal circuitry and LDO |
| WAKE2 / WAKE1 | Local wake inputs | Level- or edge-triggered; wake-source identification supported in PORT mode |
| HVMPO | High-voltage multipurpose output | Open-drain output configurable for limp-home, cyclic wake bias, or GPI sync |
Key Features
| Feature | Design Value |
|---|---|
| Limp-home activation | Automatically asserts on overtemperature, VCC undervoltage, watchdog fail, or RSTN short-to-ground |
| Cyclic wake-up support | HVMPO generates synchronized bias pulses (16/64 ms period, 70/134 µs settle) for low-power sensor polling |
| Configurable wake detection | WAKE1/WAKE2 support rising/falling/both-edge detection with status capture in PORT mode |
| Robust LIN physical layer | Integrated termination, TXD dominant timeout, LIN high-speed slope control, and ±8 kV HBM ESD on LIN pin |
| Nonvolatile configuration | SPI-programmable MTPNVM with CRC-verified writes; factory presets restorable |
Applications
| Door Module Control | Seat Position Sensor Node |
|---|---|
Use Scenario: LIN-connected door module managing window lift, lock actuation, and mirror adjustment in passenger vehicles. IC Role / Device Role / Timing Role: TJA1128GTK/1Z serves as system basis chip - supplying MCU, interfacing LIN bus, enabling local wake via door handle switch, and asserting limp-home on overtemperature. Use Value: Eliminates discrete LDO, watchdog, and LIN transceiver; reduces BOM count while meeting AEC-Q100 and ISO 17987-4 requirements. | Use Scenario: Seat position feedback node using potentiometers or Hall sensors, communicating over LIN to body control module. IC Role / Device Role / Timing Role: TJA1128GTK/1Z powers sensor signal conditioning MCU, provides LIN communication, and enables cyclic wake via HVMPO to minimize average current draw. Use Value: Achieves <15 µA average system current in sleep using configurable wake timing and low-quiescent LDO. |
| Roof Console Switch Panel | Trunk Release Actuator |
Use Scenario: Roof-mounted console with sunroof, lighting, and HVAC controls, powered from vehicle battery and communicating via LIN. IC Role / Device Role / Timing Role: TJA1128GTK/1Z supplies 5.0 V to MCU, handles LIN protocol framing, detects wake events from push-button inputs (WAKE1/WAKE2), and manages reset sequencing. Use Value: Simplifies layout with single-chip integration; supports rapid development via SPI-configurable modes and PORT-mode diagnostics. | Use Scenario: Trunk release actuator with motor driver and position sensing, requiring fail-safe operation and battery-conscious sleep behavior. IC Role / Device Role / Timing Role: TJA1128GTK/1Z acts as safety-enabling SBC - monitoring temperature, providing watchdog supervision, and triggering limp-home output (HVMPO) on fault conditions. Use Value: Meets ASIL-B–relevant functional safety needs through overtemperature shutdown, watchdog autonomy, and deterministic limp-home assertion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLIN1029DR | Single WAKE input; no HVMPO; 3.3 V LDO only; smaller HVSSOP8 package | Limited to simpler nodes without limp-home or cyclic wake requirements | Select when board space is critical and advanced wake/configurability is unnecessary |
| UJA1075ATW/3V3/1Z | Higher integration (CAN + LIN); 3.3 V LDO; larger HTSO20 package; no HVMPO | Suitable for gateway or mixed-bus nodes where CAN coexistence is required | Choose when dual-bus (LIN+CAN) functionality justifies larger footprint and higher cost |
Compared with TLIN1029DR and UJA1075ATW/3V3/1Z, the TJA1128GTK/1Z uniquely balances compact HVSON14 packaging, 5.0 V LDO capability, dual wake inputs, and field-configurable HVMPO - making it optimal for cost-sensitive, safety-aware LIN endpoints needing flexible low-power operation.
Availability
TJA1128GTK/1Z is available at Aetrix Electronics and suitable for automotive door modules, seat position sensors, roof console panels, and trunk actuators requiring stable component supply, AEC-Q100-compliant sourcing, and long-term lifecycle support.
Supply support for TJA1128GTK/1Z includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
NXP Semiconductors is a global semiconductor leader focused on automotive, industrial, and IoT applications, delivering secure, energy-efficient, and scalable silicon solutions.
The TJA1128GTK/1Z belongs to NXP's LIN System Basis Chip product line, engineered specifically for robust, low-power automotive body electronics nodes that demand integrated power, communication, safety monitoring, and configurable wake behavior.
FAQ
What LIN protocol versions does the TJA1128GTK/1Z support?
The TJA1128GTK/1Z supports LIN 2.0, LIN 2.1, LIN 2.2, and LIN 2.2A, and is fully compliant with ISO 17987-4:2016 (12 V LIN) and SAE J2602-1. It maintains backward compatibility with earlier LIN physical layers, ensuring interoperability across legacy and new nodes in the same network - a core requirement for the TJA1128GTK/1Z in multi-generation vehicle platforms.
How does the TJA1128GTK/1Z implement limp-home functionality?
The TJA1128GTK/1Z asserts limp-home automatically on four fault conditions: overtemperature, VCC undervoltage, watchdog service failure, or RSTN short-circuit to ground. When triggered, it drives the HVMPO output (if configured as limp-home) to signal degraded operation to the host system - a critical safety feature built into the TJA1128GTK/1Z's analog/mixed-signal architecture.
Can the TJA1128GTK/1Z operate with both 3.3 V and 5.0 V LDO outputs?
No - the TJA1128GTK/1Z variant is fixed at 5.0 V LDO output. While the broader TJA1128 family includes 3.3 V options (e.g., TJA1128D, TJA1128F), the TJA1128GTK/1Z specifically delivers 5.0 V ±2 % at up to 85 mA. This voltage is factory-trimmed and non-adjustable, ensuring stable MCU supply matching common automotive microcontrollers.
What is the role of the HVMPO pin in the TJA1128GTK/1Z?
The HVMPO (High-Voltage Multipurpose Output) in the TJA1128GTK/1Z is a programmable open-drain output supporting five modes: disabled, GPI-controlled, cyclic wake bias, limp-home, or state-controlled (e.g., active in NORMAL/STANDBY). Its flexibility - configured via SPI-accessible MTPNVM - makes the TJA1128GTK/1Z adaptable across diverse node architectures without hardware change.
Is the TJA1128GTK/1Z pin-compatible with other variants in the TJA1128 family?
Yes - all TJA1128 variants, including TJA1128GTK/1Z, share identical HVSON14 pinout and footprint (SOT1086-2). Differences lie in factory-configured features (e.g., WAKE count, watchdog presence, LDO voltage), not pin assignment or electrical interface. This allows drop-in replacement within the same package variant, simplifying design reuse and inventory management for the TJA1128GTK/1Z.
TJA1128GTK/1Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- -
- Package/Case:
- 14-VDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- System Basis Chip
- Interface:
- SPI
- Voltage - Supply:
- 3V ~ 28V
- Supplier Device Package:
- 14-HVSON (3x4.5)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
TJA1128GTK/1Z FAQ
1.How can I place an order for TJA1128GTK/1Z through Aetrix?
Please submit a Request for Quotation (RFQ) for TJA1128GTK/1Z on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TJA1128GTK/1Z reliable?
The price and inventory of TJA1128GTK/1Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TJA1128GTK/1Z is usually 5 days.
3.What payment methods are accepted for TJA1128GTK/1Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TJA1128GTK/1Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TJA1128GTK/1Z?
TJA1128GTK/1Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TJA1128GTK/1Z order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TJA1128GTK/1Z?
For technical support, including TJA1128GTK/1Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TJA1128GTK/1Z requirements.
6.How does Aetrix verify that TJA1128GTK/1Z is sourced from the original manufacturer or authorized distributors?
All TJA1128GTK/1Z products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TJA1128GTK/1Z meets industry standards.
7.What is the process for return or replacement of TJA1128GTK/1Z?
All TJA1128GTK/1Z units undergo pre-shipment inspection (PSI). If there is an issue with TJA1128GTK/1Z, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TJA1128GTK/1Z part is unused and in its original packaging.
Return procedure for TJA1128GTK/1Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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