TJA1128GTK/1Z

Specialized Overview

The TJA1128GTK/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, supporting baud rates up to 20 kBd with high-speed mode options. 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, a general-purpose input (GPI), and a high-voltage multipurpose (HVMPO) output. It operates within a battery range of 5.0 V to 28 V and features very low current consumption in STANDBY (typically 22 µA) and SLEEP (typically 14 µA) modes.

Specialized Feature Summary

• Integrates a LIN transceiver, LDO voltage regulator, window watchdog, and multiple I/O pins in a single package.
• Supports configurable local wake-up via WAKE1/WAKE2 pins and remote wake-up via the LIN bus.
• Features a quasi one-time programmable configuration via SPI with nonvolatile memory storage.
• Includes a limp home function triggered by overtemperature, watchdog failure, or undervoltage events.

Specialized Applications

• Automotive body control modules
• Sensor and actuator nodes in LIN networks
• Low-power vehicle subsystems requiring integrated power management

Specialized Procurement Notes

Verify the specific suffix 'GTK/1Z' against the manufacturer's official ordering table to confirm LDO voltage, WAKE pin count, and watchdog availability. Ensure the component meets AEC-Q100 qualification requirements for your target automotive environment. Confirm package type HVSON14 compatibility with your PCB assembly process.

Specialized Selection Notes

Select this part when a combined LIN communication interface and regulated power supply is required for microcontroller support. Consider the 3.3 V or 5.0 V LDO output requirement and the need for two WAKE inputs. Evaluate if the integrated window watchdog and limp home functionality reduce external component count compared to discrete solutions.

Specialized Part Context

The TJA1128 belongs to NXP's LIN Mini System Basis Chip family, which consolidates standard LIN transceiver functions with power management and system control features. This integration reduces board space and simplifies design compared to using separate transceiver and PMIC components. The family supports various configurations tailored for different automotive network topologies and power requirements.

Specialized Replacement Considerations

Direct replacements include other TJA1128 variants (e.g., TJA1128ATK/1Z) differing only in factory-set configuration parameters like LDO voltage or WAKE pin count. Verify that any substitute maintains the same HVSON14 package and pinout to ensure mechanical and electrical compatibility without redesigning the PCB footprint.