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NXP Semiconductors TJA1128CTK/1Z
- Part No.:
- TJA1128CTK/1Z
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TJA1128CTK/1Z.pdf
- Description:
- LIN MINI SYSTEM BASIS CHIP WITH
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TJA1128CTK/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 wake-up capability and limp-home safety in 12 V systems.
For engineers reviewing the TJA1128CTK/1Z datasheet, TJA1128CTK/1Z pinout, TJA1128CTK/1Z application, or TJA1128CTK/1Z equivalent, key selection considerations include LIN 2.2A/ISO 17987-4 compliance, 14 µA SLEEP-mode current, configurable cyclic wake via HVMPO, overtemperature shutdown, and AEC-Q100 qualification for under-hood deployment.
Technical Context
The TJA1128CTK/1Z implements a state-machine–driven system controller supporting nine deterministic modes (NORMAL, STANDBY, SLEEP, CONFIG, etc.), with wake-source recognition and mode transitions governed by EN, STBN, RSTN, and internal thresholds. Its LIN transceiver includes integrated termination, TXD dominant time-out, and high-speed slope control for >20 kBd operation.
Watchdog functionality operates independently of the MCU clock, offering selectable periods (16–128 ms) across Window, Timeout, and Autonomous modes - with dedicated settings for software development and EOL flashing. The HVMPO supports four configurable roles: cyclic wake bias, limp-home output, GPI-controlled switching, or state-dependent voltage-level signaling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LIN Compliance | ISO 17987-4:2016, LIN 2.0/2.1/2.2/2.2A, SAE J2602-1 - ensures interoperability in automotive LIN networks |
| LDO Output | 5.0 V ±2 %, 85 mA - powers 5 V microcontrollers with undervoltage reset and short-circuit protection |
| SLEEP Current | Typ. 14 µA - enables ultra-low-power battery monitoring during vehicle off-state |
| Wake Inputs | WAKE1 & WAKE2, level-sensitive with edge detection - supports local wake events without MCU intervention |
| Thermal Protection | Overtemperature shutdown at ≤150 °C virtual junction - prevents damage during thermal stress |
| Package | HVSON14 (3.0 × 4.5 × 0.85 mm), leadless, AOI-compatible - optimized for compact automotive PCBs |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C ambient) - qualified for engine bay and cabin control modules |
Pinout & Package
HVSON14 package (SOT1086-2), 3.0 mm × 4.5 mm × 0.85 mm body, exposed thermal pad soldered to PCB ground for enhanced thermal dissipation and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXD (SDI) | LIN transmit / SPI data input | Drives LIN bus in NORMAL mode; serves as SPI data input during CONFIG |
| EN (SCK) | Mode enable / SPI clock | Controls state transitions; provides SPI clock in CONFIG mode |
| RSTN | Bidirectional reset | Active-low reset input/output with programmable 4 ms or 700 µs pulse width |
| RXD (SDO) | LIN receive / SPI data output | Outputs LIN data and wake-event flags; returns register values during SPI reads |
| STBN (SCSN) | Standby control / SPI chip select | Activates STANDBY mode; selects device for SPI communication when LOW |
| WWD | Watchdog trigger | Feeds window watchdog; failure triggers limp-home response and RSTN assertion |
| GPI | General purpose input | Monitors external signals; can control HVMPO output in GPI-controlled mode |
| VCC | LDO regulated output | 5.0 V power supply for MCU; includes undervoltage detection and reset generation |
| GND | Ground reference | Common return path for analog/digital circuits and thermal pad connection |
| LIN | LIN bus I/O | Bidirectional LIN physical layer interface with integrated termination and bus fault protection |
| BAT | Battery supply input | Accepts 5–28 V; load-dump protected up to 43 V; powers internal regulators and transceiver |
| WAKE2 / WAKE1 | Local wake inputs | Configurable edge- or level-sensitive wake sources; support synchronized bias control via HVMPO |
| HVMPO | High-voltage multipurpose output | Open-drain output configurable as limp-home signal, cyclic wake bias, or GPI/state-controlled switch |
Key Features
| Feature | Design Value |
|---|---|
| LIN Transceiver with Integrated Termination | Eliminates external resistor in responder applications, reducing BOM count and layout area |
| Configurable Cyclic Wake via HVMPO | Enables periodic sampling of sensors (e.g., door latch status) without MCU wake-up, extending battery life |
| Limp-Home Function | Asserts HVMPO on overtemperature, watchdog timeout, VCC undervoltage, or RSTN short - maintains basic function during fault |
| Quasi One-Time SPI Configuration | Allows factory or EOL programming of watchdog behavior, wake sensitivity, and HVMPO mode via CRC-secured MTPNVM |
| Automotive Transient Robustness | Withstands ISO 7637 pulses, ±8 kV HBM ESD on LIN, ±6 kV IEC 61000-4-2 on BAT/WAKE pins - reduces need for external protection |
Applications
| Door Module Control | Seat Position Sensor Interface |
|---|---|
Use Scenario: Monitoring door open/closed status and window position in OEM door modules with LIN connectivity. IC Role / Device Role / Timing Role: TJA1128CTK/1Z acts as the LIN node's power management and communication interface, supplying 5 V to MCU and sensing wake events from door switches. Use Value: Enables <14 µA SLEEP current during vehicle off-state while maintaining reliable local wake-up from mechanical switch closures. | Use Scenario: Interfacing potentiometric seat position sensors to a LIN-connected seat ECU in premium vehicles. IC Role / Device Role / Timing Role: TJA1128CTK/1Z provides regulated 5 V power, LIN physical layer, and cyclic wake capability to sample sensor voltage without waking MCU. Use Value: Reduces average system current by >90 % vs. continuous polling, extending battery life in parked vehicle scenarios. |
| Roof Module LIN Node | Trunk Release Actuator |
Use Scenario: Controlling sunroof motor, ambient light sensor, and rain sensor in roof-mounted LIN nodes. IC Role / Device Role / Timing Role: TJA1128CTK/1Z delivers stable 5 V power, handles LIN messaging, and uses HVMPO as limp-home output during overtemperature events. Use Value: Ensures safe sunroof stop and partial functionality (e.g., manual override) even after thermal fault detection. | Use Scenario: Driving a solenoid-based trunk release actuator triggered via LIN command in rear-body control units. IC Role / Device Role / Timing Role: TJA1128CTK/1Z supplies 5 V to actuator driver MCU, monitors WAKE1 for key-fob signal, and asserts HVMPO as controlled output. Use Value: Supports fast, low-latency trunk release (<100 ms) with fail-safe behavior if MCU fails to service watchdog. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLIN1029QDRBRQ1 | Single WAKE input; no HVMPO; 3.3 V LDO only; lower SLEEP current (8 µA) | Lacks limp-home and cyclic wake features; suited for simpler nodes without bias control needs | Select when cost-sensitive design requires minimal feature set and 3.3 V MCU supply |
| UJA1075TK/3Z | Legacy LIN SBC with 5 V LDO; no SPI configuration; fixed watchdog period; larger HVQFN32 package | No MTPNVM customization; limited wake-source flexibility; higher board area requirement | Choose for legacy platform migration where pin compatibility with UJA107x family is required |
Compared with TLIN1029QDRBRQ1 and UJA1075TK/3Z, the TJA1128CTK/1Z offers unique configurability via SPI, dual wake inputs, and HVMPO-based cyclic wake - making it optimal for next-gen LIN nodes demanding functional safety and energy efficiency.
Availability
TJA1128CTK/1Z is available at Aetrix Electronics and suitable for automotive door modules, seat position sensors, roof control units, and trunk actuators requiring stable component supply across production lifecycles.
Supply support for TJA1128CTK/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, scalable silicon solutions with deep system expertise.
The TJA1128CTK/1Z belongs to NXP's LIN System Basis Chip portfolio, engineered specifically for robust, low-power LIN network nodes in 12 V automotive systems - emphasizing functional safety, wake-up efficiency, and seamless integration with microcontrollers.
FAQ
What LIN protocol versions does the TJA1128CTK/1Z support?
The TJA1128CTK/1Z supports LIN 2.0, LIN 2.1, LIN 2.2, and LIN 2.2A protocols, and is fully compliant with ISO 17987-4:2016 (12 V LIN) and SAE J2602-1 standards. It operates at baud rates up to 20 kBd natively, with high-speed mode enabling >20 kBd operation via adjustable slope control - ensuring interoperability across legacy and modern LIN networks.
How does the TJA1128CTK/1Z achieve ultra-low power consumption in SLEEP mode?
The TJA1128CTK/1Z achieves typ. 14 µA SLEEP-mode current by disabling the LDO regulator, LIN transceiver, and watchdog while retaining wake detection on LIN, WAKE1, and WAKE2. Its internal state machine maintains wake-source recognition logic in minimal power domain, allowing immediate transition to NORMAL mode upon valid event - critical for battery-powered automotive modules.
Can the TJA1128CTK/1Z be configured after soldering to the PCB?
Yes, the TJA1128CTK/1Z supports quasi one-time configuration via SPI interface in CONFIG mode. Using the EN, STBN, TXD, and RXD pins as SPI signals, users can program MTPNVM registers to customize watchdog behavior, wake sensitivity, HVMPO function, and LDO settings - all secured by CRC validation to prevent accidental corruption.
What safety functions does the TJA1128CTK/1Z provide for automotive use?
The TJA1128CTK/1Z provides multiple safety functions: overtemperature shutdown (≤150 °C), limp-home activation on VCC undervoltage/watchdog failure/RSTN short, LIN-bus short-circuit protection to battery/ground, and load-dump immunity up to 43 V. These features meet ISO 26262 ASIL-B readiness requirements for body electronics applications.
Is the TJA1128CTK/1Z pin-compatible with other variants in the TJA1128 family?
Yes, all TJA1128 variants - including TJA1128CTK/1Z - share identical HVSON14 (SOT1086-2) packaging and pinout. Differences between variants (e.g., TJA1128E vs. TJA1128G) relate solely to factory-programmed features (LDO voltage, number of WAKE inputs, watchdog enablement), not physical layout - enabling flexible BOM management and design reuse.
TJA1128CTK/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
TJA1128CTK/1Z FAQ
1.How can I place an order for TJA1128CTK/1Z through Aetrix?
Please submit a Request for Quotation (RFQ) for TJA1128CTK/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 TJA1128CTK/1Z reliable?
The price and inventory of TJA1128CTK/1Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TJA1128CTK/1Z is usually 5 days.
3.What payment methods are accepted for TJA1128CTK/1Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TJA1128CTK/1Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TJA1128CTK/1Z?
TJA1128CTK/1Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TJA1128CTK/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 TJA1128CTK/1Z?
For technical support, including TJA1128CTK/1Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TJA1128CTK/1Z requirements.
6.How does Aetrix verify that TJA1128CTK/1Z is sourced from the original manufacturer or authorized distributors?
All TJA1128CTK/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 TJA1128CTK/1Z meets industry standards.
7.What is the process for return or replacement of TJA1128CTK/1Z?
All TJA1128CTK/1Z units undergo pre-shipment inspection (PSI). If there is an issue with TJA1128CTK/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 TJA1128CTK/1Z part is unused and in its original packaging.
Return procedure for TJA1128CTK/1Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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