Buck/Boost High-Speed CAN/LIN System Basis Chip

UJA113xA Active

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The UJA113xA System Basis Chip (SBC) contains a fully integrated automatic SMPS Buck-Boost converter, a High-Speed CAN transceiver and up to two LIN transceivers along with a number of features commonly found in typical automotive Electronic Control Units (ECUs). It interfaces directly with CAN and LIN bus lines, supplies the microcontroller, handles input and output signals and supports fail-safe features including a watchdog and advanced 'limp home' functionality configurable via non-volatile memory.

The UJA113xA implements the High-Speed CAN physical layer as defined in the ISO 11898-2:2016 standard with additional timing parameters included, defining loop delay symmetry for CAN FD communication up to 5 Mbit/s. The UJA113xAHW/xFx variants support ISO 11898-2:2016 compliant CAN partial networking with a selective wake-up function incorporating CAN FD-passive.

Block Diagram

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UJA113xAHW/x

UJA113xAHW/x Block Diagram

UJA113xAHW/xFx

UJA113xAHW/xFx Block Diagram
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Features

General

  • Designed for automotive applications according to ISO 11898-2:2016
  • ±6 kV ESD protection according to the Human Body Model (HBM) on the CAN/LIN bus pins
  • ±6 kV ESD protection according to IEC 61000-4-2 on the CAN/LIN bus pins, the sensor supply output (VEXT) and the HVIO pins
  • ±40 V short-circuit proof CAN/LIN bus pins
  • Battery and CAN/LIN bus pins are protected against transients in accordance with ISO 7637-3

Integrated Buck and Boost Converter (SMPS)

  • Automatic Buck or Boost mode selection depending on input voltage and output load conditions functions with a single external coil
  • The SMPS functions as a pre-regulator for V1 and, optionally, V2
  • The SMPS can be used to supply external loads directly

Low-Drop Voltage Regulators (LDOs)

  • V1 voltage regulator 5 V or 3.3 V with 500 mA output current capability
  • V2 auxiliary voltage regulator 5 V with 100 mA output current capability
  • V2 is protected against shorts to GND and battery for off-board loads

CAN Transceiver

  • ISO 11898-2:2016 compliant 1 Mbit/s high-speed CAN transceiver supporting CAN FD active communication up to 5 Mbit/s in the CAN FD data field
  • Autonomous bus biasing according to ISO 11898-2:2016
  • UJA113xAHW/xFx: selective wake-up function (ISO11898-2:2016 compliant CAN partial networking)

LIN Transceivers

  • One or two LIN channels depending on the selected device
  • LIN 2.x and SAE J2602 compliant
  • Integrated LIN follower termination
  • Improved EMC emission performance with optimized curve shaping

High-Voltage I/Os (not available in UJA113xAHW/xF0 variants)

  • 4 or 8 I/O pins individually configurable as high- or low-side output drivers
  • Reverse-current protection of the output in off-mode (loss-of-ground and loss-of-battery proof)
  • Open-load diagnostics and short-circuit protection and diagnostics
  • Individually configurable as inputs with wake-up capability
  • Three HVIOs can be configured individually as limp-home outputs

A/D Converter for Monitoring the Battery Voltage

  • Two channels: 10-bit resolution, accurate to ±300 mV at 20 V full scale
  • Undervoltage and overvoltage detection

Product Longevity Program

  • This product is included in the NXP Product Longevity Program ensuring a stable supply of products for your embedded designs. The UJA113xA is included in the 15-year program.

Part numbers include: UJA1131AHW, UJA1132AHW, UJA1135AHW, UJA1136AHW.

Comparison Table

Part Number Description CAN PHY LIN PHY Safety Level Interface and Input Control Additional Features - Analog AEC-Q100 Temperature Range Ambient Operating Temperature (Min to Max) (°C)
UJA1131AHW Buck/boost HS-CAN/LIN system basis chip, 5 V/500 mA + 5 V/100 mA, up to 8 HVIO, optional CAN Partial Networking 1, CAN FD 1 QM SPI 8x HVIO, LDO (5 V/500 mA), Sensor Supply (5 V/100 mA), LIMP output, Watchdog Grade 1 -40 to 125
UJA1132AHW Buck/boost HS-CAN/dual-LIN system basis chip, 5 V/500 mA + 5 V/100 mA, up to 8 HVIO, optional CAN Partial Networking 1, CAN FD 2 QM SPI 8x HVIO, LDO (5 V/500 mA), Sensor Supply (5 V/100 mA), LIMP output, Watchdog Grade 1 -40 to 125
UJA1135AHW Buck HS-CAN/LIN system basis chip, 5 V/500 mA + 5 V/100 mA, 8 HVIO 1, CAN FD 1 QM SPI 8x HVIO, LDO (5 V/500 mA), Sensor Supply (5 V/100 mA), LIMP output, Watchdog Grade 1 -40 to 125
UJA1136AHW Buck HS-CAN/dual-LIN system basis chip, 5 V/500 mA + 5 V/100 mA, 8 HVIO 1, CAN FD 2 QM SPI 8x HVIO, LDO (5 V/500 mA), Sensor Supply (5 V/100 mA), LIMP output, Watchdog Grade 1 -40 to 125

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