TJA1128HTK/1Z

Specialized Overview

The TJA1128HTK/1Z is a LIN Mini System Basis Chip (SBC) from NXP Semiconductors, designed for road vehicles with nominal 12 V systems. It integrates a LIN transceiver compliant with ISO 17987-4:2016 and SAE J2602, a low-dropout voltage regulator (LDO), a window watchdog, two WAKE inputs, one general purpose input (GPI), and one high-voltage multipurpose (HVMPO) output. The LDO provides up to 85 mA at 3.3 V or 5.0 V. The device supports very low current consumption in STANDBY (typically 22 µA) and SLEEP modes (typically 14 µA). It features quasi one-time configuration via SPI and operates within a battery range of 5.0 V to 28 V.

Specialized Feature Summary

• Integrates a LIN transceiver, LDO, watchdog, and multiple I/Os into a single HVSON14 package.
• Supports configurable wake-up sources including remote LIN bus and local pins WAKE1/WAKE2.
• Features a programmable HVMPO output for bias control, limp home functions, or GPI-controlled signaling.
• Includes a window watchdog with selectable periods and autonomous mode capabilities.

Specialized Applications

• Body Control Modules (BCM)
• Seat control units
• Sensor nodes

Specialized Procurement Notes

Verify the specific suffix HTK against official documentation to confirm pin compatibility and initial configuration settings. Ensure the ordering information matches the required LDO voltage and watchdog availability for your design.

Specialized Selection Notes

Select this component when a compact solution for automotive LIN nodes is required. Consider the integrated power management and configurable outputs to reduce external component count and PCB area.

Specialized Part Context

This part belongs to the TJA1128 family of LIN mini system basis chips. Variants differ by LDO voltage, number of WAKE inputs, and watchdog presence. The TJA1128HTK/1Z represents a specific configuration within this series.

Specialized Replacement Considerations

Check datasheet for drop-in compatible alternatives within the TJA112x family. Verify pin-to-pin compatibility and functional equivalence before substitution.

Specialized FAQ

What is the maximum baud rate supported by the LIN transceiver?

The LIN transceiver supports baud rates up to 20 kBd, with high-speed mode enabling faster rates.

How is the device configured after manufacturing?

Configuration is performed via SPI in CONFIG mode using quasi one-time programmable nonvolatile memory (MTPNVM).

What protection features are included?

The device includes overtemperature shutdown, undervoltage detection, short-circuit proof outputs, and ESD protection.