TJA1128ATK/1Z

Specialized Overview

The TJA1128ATK/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, supporting baud rates up to 20 kBd. The device features an integrated low-dropout voltage regulator (LDO) delivering up to 85 mA at a fixed 5.0 V output. Additional on-chip resources include a window watchdog timer, two local wake-up inputs (WAKE1, WAKE2), 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 supports very low current consumption in STANDBY and SLEEP modes.

Specialized Feature Summary

• Integrates a fully compliant LIN transceiver with high-speed mode support and integrated termination resistor.
• Features a configurable quasi one-time programmable configuration via SPI interface for disabling specific functions.
• Includes a window watchdog with selectable periods and microcontroller-independent clock source.
• Provides robust protection against overtemperature, undervoltage, and short circuits with limp home functionality.

Specialized Applications

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

Specialized Procurement Notes

Verify the ordering suffix 'TK/1Z' corresponds to the HVSON14 package and reel/cut tape packaging format. Confirm that the 'A' variant specifically provides the 5.0 V LDO output and lacks the window watchdog feature as defined in the family overview. Ensure compatibility with AEC-Q100 qualification requirements for your specific automotive application environment.

Specialized Selection Notes

Select this part when a 5.0 V microcontroller supply is required without an external LDO. The absence of a built-in watchdog distinguishes it from variants like the TJA1128E or F; if watchdog functionality is needed, choose a different suffix. Verify that the single WAKE input meets the design's wake-up source requirements, as other variants offer two inputs.

Specialized Part Context

This component belongs to the TJA1128 LIN mini SBC family. Variants such as TJA1128B provide a 3.3 V LDO, while TJA1128C offers a 5.0 V LDO with two wake inputs. Higher-end variants like TJA1128E integrate a window watchdog. All share the same HVSON14 package and core LIN transceiver architecture.

Specialized Replacement Considerations

TJA1128CTK/1Z provides similar 5.0 V regulation but includes two WAKE inputs instead of one. TJA1128ETK/1Z adds a window watchdog function. Direct pin-to-pin replacement requires verifying that the missing watchdog or additional wake inputs do not impact the specific circuit design.