TJA1128ETK/1Z

Specialized Overview

The TJA1128ETK/1Z is a LIN Mini System Basis Chip (SBC) from NXP Semiconductors, designed for automotive applications with a nominal 12 V system. It integrates a LIN transceiver compliant with ISO 17987-4:2016 and SAE J2602 standards, supporting baud rates up to 20 kBd. The device includes a low-dropout voltage regulator (LDO) delivering up to 85 mA at 3.3 V or 5.0 V output, a window watchdog, two WAKE inputs, one general purpose input (GPI), and one high-voltage multipurpose (HVMPO) output. It operates within a battery supply range of 5.0 V to 28 V and features very low current consumption in STANDBY (typically 22 µA) and SLEEP modes (typically 14 µA). The component is housed in a leadless HVSON14 package (3.0 mm × 4.5 mm) and is qualified according to AEC-Q100.

Specialized Feature Summary

• Integrates a LIN transceiver, LDO voltage regulator, window watchdog, and multiple I/O pins into a single compact package.
• Supports configurable wake-up sources including remote LIN bus wake-up and local WAKE1/WAKE2 inputs with level-sensitive or cyclic detection options.
• Features quasi one-time configuration via SPI interface, allowing customization of functions such as watchdog period, reset pulse width, and HVMPO mode.
• Provides robust protection against automotive electrical stresses, including load dump up to 43 V and high ESD immunity on bus and battery pins.

Specialized Applications

• Body Control Modules (BCM)
• Seat control units
• Sensor nodes requiring cost-effective integration

Specialized Procurement Notes

Verify the specific ordering suffix '1Z' against the manufacturer's official documentation to confirm exact factory preset configurations, such as initial CRC values and default LDO output voltages. Ensure compatibility with existing PCB footprints and thermal requirements for the HVSON14 package before finalizing procurement decisions.

Specialized Selection Notes

Select this component when a highly integrated solution is needed to reduce bill of materials and PCB area for LIN-based automotive nodes. Consider the available LDO output voltage options (3.3 V or 5.0 V) and the number of required wake-up inputs to choose the appropriate variant within the TJA1128 family that matches the microcontroller supply and system architecture.

Specialized Part Context

The TJA1128 belongs to NXP's LIN mini System Basis Chip portfolio, which consolidates essential node infrastructure components. It is part of a broader family of automotive interface solutions designed to simplify design while maintaining compliance with strict automotive standards like AEC-Q100 and ISO 17987.

Specialized Replacement Considerations

Direct pin-to-pin replacements within the same family include TJA1128ETK/0Z. Verify functional equivalence regarding LDO voltage, wake-up pin count, and watchdog availability before substitution.