TJA1128GTK/0Z

The TJA1128 is a LIN miniature system basis chip (SBC) featuring a LIN transceiver, low dropout regulator (LDO), window watchdog, two wake-up inputs, one general purpose input (GPI), and one high-voltage multifunction (HVMPO) output. The regulator delivers up to 85 mA with selectable output voltages of 3.3 V and 5.0 V. The TJA1128 operates in ultra-low current standby and sleep modes with bus and local wake-up capability.

Applications

• Automotive Electronics

Key features

• Road vehicles with nominal 12 V systems, battery operating range 5.0 V to 28 V
• Ultra-low current consumption in sleep and standby modes: sleep mode (regulator off) typical 14 μA; standby mode (regulator on) typical 22 μA
• Remote wake-up via LIN pin
• Local wake-up via WAKE1 and WAKE2 pins: configurable level-sensitive wake-up detection; cyclic sampling wake-up detection with synchronous bias control via HVMPO pin
• Wake-up source identification
• Configurable high-voltage multi-purpose output (HVMPO): bias control output for cyclic wake-up; limp home output; bias control output for battery monitoring circuit; general-purpose input (GPI) controlled output
• Limp home function on overtemperature, watchdog service failure, VCC undervoltage, and RSTN short-to-ground
• Overtemperature shutdown
• Bidirectional reset pin with selectable power-on reset duration
• Quasi one-time configuration via SPI
• Initial mode with configurable and disableable functions (e.g., LIN, watchdog, reset, wake-up) and modes (e.g., sleep)
• LDO regulator powering 3.3 V/5.0 V microcontrollers: nominal output voltage 5.0 V/3.3 V with ±2% accuracy; output current capability 85 mA; undervoltage detection with reset output; excellent transient response with small ceramic output capacitor; output short-to-ground protection
• LIN transceiver: 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; K-line compatible; baud rate up to 20 kBd; LIN high-speed mode supporting baud rates > 20 kBd; integrated termination resistor for LIN responder applications; TXD dominant timeout
• Window watchdog: window, timeout, and autonomous modes; clock source independent of microcontroller; watchdog period selectable from 16 ms to 128 ms; dedicated modes for software development and end-of-line flashing
• Designed for automotive applications: AEC-Q100 compliant; load dump pulse protection up to 43 V; LIN bus pin ±8 kV ESD protection per HBM; BAT, WAKE1, WAKE2 pins ±6 kV ESD protection per IEC 61000-4-2, LIN pin ±8 kV; bus termination and battery pins transient protection in automotive environment (ISO 7637); LIN bus pin short-to-battery and short-to-ground protection; leadless HVSON14 package (3.0 mm × 4.5 mm) with AOI support and low thermal resistance