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NXP Semiconductors TJA1128BTK/1Z
- Part No.:
- TJA1128BTK/1Z
- Manufacturer:
- NXP Semiconductors
- Category:
- Specialized
- Package:
- 14-VDFN Exposed Pad
- Datasheet:
-
TJA1128BTK/1Z.pdf
- Description:
- LIN MINI SYSTEM BASIS CHIP WITH
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
TJA1128BTK/1Z from NXP Semiconductors is a LIN Mini System Basis Chip (SBC) integrating a LIN transceiver, 3.3 V/85 mA LDO regulator, window watchdog, two WAKE inputs, one GPI, and an open-drain HVMPO output. It supports ISO 17987-4:2016, LIN 2.0–2.2A, and SAE J2602 in automotive 12 V systems, enabling low-power node control in body electronics modules.
For engineers reviewing the TJA1128BTK/1Z datasheet, TJA1128BTK/1Z pinout, TJA1128BTK/1Z application, or TJA1128BTK/1Z equivalent, key selection considerations include its 3.3 V LDO output, dual local wake-up capability, configurable HVMPO for limp-home or cyclic bias control, and AEC-Q100 qualification for under-hood use.
Technical Context
The TJA1128BTK/1Z implements a state-machine-based system controller supporting nine modes-including NORMAL, STANDBY, SLEEP, and CONFIG-with mode transitions governed by EN, STBN, and RSTN signals. Its LIN transceiver includes integrated termination for responder applications and TXD dominant time-out protection.
Watchdog operation uses a microcontroller-independent clock with selectable periods (16–128 ms) and three modes: Window, Timeout, and Autonomous. The HVMPO output is software-configurable via SPI register MPOMOD for limp-home, GPI-controlled, or cyclic wake-up bias functions-enabling flexible fault-handling and ultra-low-power monitoring.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| LDO Output Voltage | 3.3 V ±2 % - powers 3.3 V microcontrollers with tight regulation tolerance |
| LDO Output Current | 85 mA - sufficient for typical automotive MCUs and peripheral logic |
| SLEEP Mode Current | 14 µA typ - enables multi-year battery life in always-on LIN nodes |
| STANDBY Mode Current | 22 µA typ - maintains regulated VCC while disabling LIN transceiver |
| LIN Baud Rate | Up to 20 kBd - meets standard LIN communication requirements |
| Watchdog Period | Selectable 16–128 ms - supports diverse MCU firmware timing constraints |
| Operating Voltage Range | 5.0 V to 28 V - compatible with full automotive battery range including cranking |
| AEC-Q100 Grade | Grade 1 (−40 °C to +125 °C) - qualified for engine compartment and body control unit placement |
Pinout & Package
Package: HVSON14 (3.0 mm × 4.5 mm, 0.85 mm height), leadless thermal-enhanced package with exposed center pad requiring soldering to PCB ground for optimal thermal and EMI performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TXD (SDI) | Digital input | LIN transmit data input; SPI data-in during CONFIG mode |
| EN (SCK) | Digital input | Enable control; SPI clock input during CONFIG mode |
| RSTN | Digital I/O | Active-low reset with programmable pulse width (4 ms or 700 µs) |
| RXD (SDO) | Digital output | LIN receive data output; carries wake-source status in PORT mode |
| STBN (SCSN) | Digital input | Standby control; SPI chip select during CONFIG mode |
| WWD | Digital input | Window watchdog trigger input for external service |
| GPI | Digital input | General-purpose input usable for status sensing or HVMPO control |
| VCC | Power supply | Regulated 3.3 V output (85 mA), with undervoltage detection and reset assertion |
| GND | Ground | Reference for all analog/digital circuitry; connects to exposed thermal pad |
| LIN | Analog I/O | LIN bus interface with ±43 V fault tolerance and short-circuit protection |
| BAT | Power supply | Main 12 V battery input (5–28 V operating range), load-dump protected to 43 V |
| WAKE2 / WAKE1 | Digital input | Level- or edge-sensitive local wake-up inputs with configurable detection |
| HVMPO | Digital output | Open-drain high-voltage multipurpose output for limp-home, cyclic wake bias, or GPI-controlled switching |
Key Features
| Feature | Design Value |
|---|---|
| LIN Transceiver Compliance | Fully compliant with ISO 17987-4:2016, LIN 2.0–2.2A, and SAE J2602 - ensures interoperability across automotive LIN networks |
| Configurable Wake Sources | Supports remote (LIN bus) and dual local (WAKE1/WAKE2) wake-up with source identification - eliminates ambiguous wake events in multi-node systems |
| HVMPO Flexibility | Software-selectable operation modes (limp-home, GPI-controlled, cyclic bias) via SPI register MPOMOD - reduces need for external discrete components |
| Ultra-Low-Power Modes | SLEEP mode draws only 14 µA; STANDBY maintains 3.3 V VCC at 22 µA - extends battery life without sacrificing restart readiness |
| Robust Automotive Protection | Load dump protection to 43 V, ±8 kV HBM ESD on LIN, ±6 kV IEC 61000-4-2 on BAT/WAKE pins - meets OEM EMC and reliability requirements |
| Nonvolatile Configuration | MTP memory stores user-defined settings (watchdog period, wake enable, HVMPO mode) - eliminates boot-time SPI reconfiguration in production systems |
Applications
| Body Control Module (BCM) | Door Module |
|---|---|
Use Scenario: Centralized control of interior lighting, power windows, and mirror adjustment via LIN network. IC Role / Device Role / Timing Role: LIN SBC providing regulated 3.3 V power, LIN physical layer, and wake-up supervision for MCU. Use Value: Enables single-chip integration of power, communication, and safety monitoring - reducing BOM count and PCB area in space-constrained modules. | Use Scenario: Local control of door lock actuators, window lift motors, and anti-pinch sensors. IC Role / Device Role / Timing Role: LIN node with dual WAKE inputs detecting mechanical switch closures and LIN bus commands. Use Value: Supports reliable local wake-up from sleep without MCU intervention - critical for fast response to door handle or key-fob events. |
| Roof Module | Seat Control Unit |
Use Scenario: Sunroof position control, ambient lighting dimming, and rain sensor interface. IC Role / Device Role / Timing Role: LIN SBC delivering 3.3 V power and hosting HVMPO as limp-home output for sunroof emergency stop. Use Value: HVMPO configured as limp-home output asserts fault condition directly to actuator driver - bypassing MCU failure scenarios. | Use Scenario: Memory seat position recall, heating/ventilation control, and occupancy detection. IC Role / Device Role / Timing Role: LIN SBC using cyclic wake-up via HVMPO to periodically sample seat sensor inputs during SLEEP mode. Use Value: Achieves <15 µA average current during monitoring cycles - extends vehicle standby time without compromising occupant detection responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LIN SBC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLIN1029DR | 3.3 V LDO (80 mA), single WAKE input, no HVMPO, no window watchdog | Limited wake flexibility and no limp-home or cyclic bias capability | Choose when basic LIN transceiver + regulator suffices and cost sensitivity outweighs feature depth |
| MC33897TAER2 | 5.0 V LDO (120 mA), dual WAKE, HVMPO, window watchdog, but larger SOIC-16 package | Higher LDO current and same functional scope, but 30% larger footprint and higher thermal resistance | Prefer when 5.0 V MCU supply is required and board space allows SOIC packaging |
Compared with TLIN1029DR and MC33897TAER2, the TJA1128BTK/1Z uniquely combines 3.3 V regulation, dual wake inputs, HVMPO configurability, and HVSON14's AOI-friendly 3×4.5 mm footprint - making it optimal for compact, feature-rich LIN nodes where thermal performance and layout efficiency are critical.
Availability
TJA1128BTK/1Z is available at Aetrix Electronics and suitable for body control modules, door modules, roof modules, and seat control units requiring stable component supply across automotive production lifecycles.
Supply support for TJA1128BTK/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 secure connectivity solutions for automotive, industrial, and IoT applications, with deep expertise in automotive-grade mixed-signal ICs.
The TJA1128 family is designed specifically for cost-optimized, low-power LIN network nodes in automotive body electronics - integrating essential power, communication, and safety functions into a single AEC-Q100-qualified device.
FAQ
What is the LDO output voltage and accuracy of the TJA1128BTK/1Z?
The TJA1128BTK/1Z provides a fixed 3.3 V LDO output with ±2 % accuracy over temperature and load. This precision enables direct powering of 3.3 V microcontrollers without external regulation, and its 85 mA output current supports typical MCU cores plus small peripheral loads such as GPIO expanders or CAN transceivers in LIN gateway designs.
How does the TJA1128BTK/1Z support wake-up in ultra-low-power applications?
The TJA1128BTK/1Z supports wake-up from SLEEP mode (14 µA) via LIN bus activity, or locally through WAKE1 and WAKE2 inputs with configurable edge/level sensitivity. Its PORT mode allows reading captured wake sources via serial status bits on RXD, enabling deterministic wake-source identification without MCU boot - a critical capability for rapid response in battery-powered automotive accessories.
Can the HVMPO pin on the TJA1128BTK/1Z be used for limp-home functionality?
Yes - the HVMPO pin on the TJA1128BTK/1Z can be configured as a limp-home output via SPI register MPOMOD = 011. When activated, it asserts a fault signal (open-drain LOW) during overtemperature, VCC undervoltage, watchdog timeout, or RSTN short-to-ground - allowing direct control of fail-safe actuators independent of MCU health, which is essential for safety-critical LIN nodes like sunroof or seat controls.
What LIN protocol versions and standards does the TJA1128BTK/1Z support?
The TJA1128BTK/1Z is compliant with ISO 17987-4:2016 (12 V LIN), LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, and SAE J2602-1. It also supports K-line compatibility and offers LIN high-speed mode for baud rates above 20 kBd. These certifications ensure seamless interoperability with legacy and next-generation LIN master and slave nodes across global automotive platforms.
Is the TJA1128BTK/1Z pin-compatible with other variants in the TJA1128 family?
Yes - all TJA1128 variants, including TJA1128BTK/1Z, share identical HVSON14 pinout and electrical behavior. Differences between variants (e.g., TJA1128A vs. TJA1128B) relate solely to factory-programmed configuration: LDO voltage (3.3 V vs. 5.0 V), number of WAKE inputs (1 vs. 2), and watchdog enablement. No PCB redesign is needed when migrating between variants, simplifying platform reuse and inventory management.
TJA1128BTK/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
TJA1128BTK/1Z FAQ
1.How can I place an order for TJA1128BTK/1Z through Aetrix?
Please submit a Request for Quotation (RFQ) for TJA1128BTK/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 TJA1128BTK/1Z reliable?
The price and inventory of TJA1128BTK/1Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TJA1128BTK/1Z is usually 5 days.
3.What payment methods are accepted for TJA1128BTK/1Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TJA1128BTK/1Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TJA1128BTK/1Z?
TJA1128BTK/1Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TJA1128BTK/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 TJA1128BTK/1Z?
For technical support, including TJA1128BTK/1Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TJA1128BTK/1Z requirements.
6.How does Aetrix verify that TJA1128BTK/1Z is sourced from the original manufacturer or authorized distributors?
All TJA1128BTK/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 TJA1128BTK/1Z meets industry standards.
7.What is the process for return or replacement of TJA1128BTK/1Z?
All TJA1128BTK/1Z units undergo pre-shipment inspection (PSI). If there is an issue with TJA1128BTK/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 TJA1128BTK/1Z part is unused and in its original packaging.
Return procedure for TJA1128BTK/1Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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