UJA1075ATW

High-speed CAN/ LIN core system basis chip


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The UJA1075A core System Basis Chip (SBC) replaces the basic discrete components commonly found in Electronic Control Units (ECU) with a high-speed Controller Area Network (CAN) and a Local Interconnect Network (LIN) interface.

The UJA1075A supports the networking applications used to control power and sensor peripherals by using a high-speed CAN as the main network interface and the LIN interface as a local sub-bus.

The core SBC contains the following integrated devices:

  • High-speed CAN transceiver, inter-operable and downward compatible with CAN transceiver TJA1042, and compatible with the ISO 11898-2 and ISO 11898-5 standards
  • LIN transceiver compliant with LIN 2.1, LIN 2.0 and SAE J2602, and compatible with LIN 1.3
  • Advanced independent watchdog (UJA1075A/xx/WD versions)
  • 250 mA voltage regulator for supplying a microcontroller; extendable with external PNP transistor for increased current capability and dissipation distribution
  • Separate voltage regulator for supplying the on-board CAN transceiver
  • Serial Peripheral Interface (SPI) (full duplex)
  • 2 local wake-up input ports
  • Limp home output port

In addition to the advantages gained from integrating these common ECU functions in a single package, the core SBC offers an intelligent combination of system-specific functions such as:

  • Advanced low-power concept
  • Safe and controlled system start-up behavior
  • Detailed status reporting on system and sub-system levels

The UJA1075A is designed to be used in combination with a microcontroller that incorporates a CAN controller. The SBC ensures that the microcontroller always starts up in a controlled manner.

Features and benefits

2.1 General

  • Contains a full set of CAN and LIN ECU functions:
    • CAN transceiver and LIN transceiver
    • Scalable 3.3 V or 5 V voltage regulator delivering up to 250 mA for a microcontroller and peripheral circuitry; an external PNP transistor can be connected for better heat distribution over the PCB
    • Separate voltage regulator for the CAN transceiver (5 V)
    • Watchdog with Window and Timeout modes and on-chip oscillator
    • Serial Peripheral Interface (SPI) for communicating with the microcontroller
    • ECU power management system
  • Designed for automotive applications:
    • Enhanced ElectroMagnetic Compatibility (EMC) performance
    • ±8 kV ElectroStatic Discharge (ESD) protection Human Body Model (HBM) on the CAN/LIN bus pins and the wake-up pins
    • ±6 kV ElectroStatic Discharge protection IEC 61000-4-2 on the CAN/LIN bus pins and the wake-up pins
    • ±58 V short-circuit proof CAN/LIN bus pins
    • Battery and CAN/LIN bus pins are protected against transients in accordance with ISO 7637-3
  • Supports remote flash programming via the CAN bus
  • Small 6.1 mm × 11 mm HTSSOP32 package with low thermal resistance
  • Pb-free; Restriction of Hazardous Substances Directive (RoHS) and dark green compliant

2.2 CAN transceiver

  • ISO 11898-2 and ISO 11898-5 compliant high-speed CAN transceiver
  • Dedicated low dropout voltage regulator for the CAN bus:
    • Independent of the microcontroller supply
    • Significantly improves EMC performance
  • Bus connections are truly floating when power is off
  • SPLIT output pin for stabilizing the recessive bus level

2.3 LIN transceiver

  • LIN 2.1 compliant LIN transceiver
  • Compliant with SAE J2602
  • Downward compatible with LIN 2.0 and LIN 1.3
  • Low slope mode for optimized EMC performance
  • Integrated LIN termination diode at pin DLIN

2.4 Power management

  • Wake-up via CAN, LIN or local wake-up pins with wake-up source detection
  • 2 wake-up pins:
    • WAKE1 and WAKE2 inputs can be switched off to reduce current flow
    • Output signal (WBIAS) to bias the wake-up pins, selectable sampling time of 16 ms or 64 ms
  • Standby mode with very low standby current and full wake-up capability; V1 active to maintain supply to the microcontroller
  • Sleep mode with very low sleep current and full wake-up capability

2.5 Control and diagnostic features

  • Safe and predictable behavior under all conditions
  • Programmable watchdog with independent clock source:
    • Window, Timeout (with optional cyclic wake-up) and Off modes supported (with automatic re-enable in the event of an interrupt)
  • 16-bit Serial Peripheral Interface (SPI) for configuration, control and diagnosis
  • Global enable output for controlling safety-critical hardware
  • Limp home output (LIMP) for activating application-specific ‘limp home’ hardware in the event of a serious system malfunction
  • Overtemperature shutdown
  • Interrupt output pin; interrupts can be individually configured to signal V1/V2 undervoltage, CAN/LIN/local wake-up and cyclic and power-on interrupt events
  • Bidirectional reset pin with variable power-on reset length to support a variety of microcontrollers
  • Software-initiated system reset

2.6 Voltage regulators

  • Main voltage regulator V1:
    • Scalable voltage regulator for the microcontroller, its peripherals and additional external transceivers
    • ±2 % accuracy
    • 3.3 V and 5 V versions available
    • Delivers up to 250 mA and can be combined with an external PNP transistor for better heat distribution over the PCB
    • Selectable current threshold at which the external PNP transistor starts to deliver current
    • Undervoltage warning at 90 % of nominal output voltage and undervoltage reset at 90 % or 70 % of nominal output voltage
    • Can operate at VBAT voltages down to 4.5 V (e.g. during cranking), in accordance with ISO 7637 pulse 4/4b and ISO 16750-2
    • Stable output under all conditions
  • Voltage regulator V2 for CAN transceiver:
    • Dedicated voltage regulator for on-chip high-speed CAN transceiver
    • Undervoltage warning at 90 % of nominal output voltage
    • Can be switched off; CAN transceiver can be supplied by V1 or by an external voltage regulator
    • Can operate at VBAT voltages down to 5.5 V (e.g. during cranking) in accordance with ISO 7637, pulse 4
    • Stable output under all conditions
All information on this product information page is subject to the subsequent disclaimers:
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Parametric search

Parametrics of this product

Type numberPackagePackage nameApplicationCategoryConfigurationFunctionNumber of pinsSupply voltage [min](V)Supply voltage [max](V)Transceiver type
UJA1075ATWSOT549-1
(HTSSOP32)		HTSSOP32AutomotiveCore SBCHS-CAN transceiver; LIN transceiver; 2 voltage regulators; watchdogSystem Basis Chip324.528HS-CAN; LIN

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Package

Type numberOrderable part numberOrdering code (12NC)Product statusPackagePackingMarking
UJA1075ATW/3V3UJA1075ATW/3V3,1189352 924 18118Volume productionSOT549-1
(HTSSOP32) 		Reel Pack, SMD, 13"Standard Marking
UJA1075ATW/3V3UJA1075ATW/3V3,1129352 924 18112Volume productionSOT549-1
(HTSSOP32) 		TubeStandard Marking
UJA1075ATW/3V3/WDUJA1075ATW/3V3WD,19352 924 17118Volume productionSOT549-1
(HTSSOP32) 		Reel Pack, SMD, 13"Standard Marking
UJA1075ATW/3V3/WDUJA1075ATW/3V3/WD,9352 924 17112Volume productionSOT549-1
(HTSSOP32) 		TubeStandard Marking
UJA1075ATW/5V0UJA1075ATW/5V0,1129352 924 15112Volume productionSOT549-1
(HTSSOP32) 		TubeStandard Marking
UJA1075ATW/5V0UJA1075ATW/5V0,1189352 924 15118Volume productionSOT549-1
(HTSSOP32) 		Reel Pack, SMD, 13"Standard Marking
UJA1075ATW/5V0/WDUJA1075ATW/5V0WD,19352 924 16118Volume productionSOT549-1
(HTSSOP32) 		Reel Pack, SMD, 13"Standard Marking
UJA1075ATW/5V0/WDUJA1075ATW/5V0/WD,9352 924 16112Volume productionSOT549-1
(HTSSOP32) 		TubeStandard Marking

Outline drawing

Package VersionPackage NamePackage DescriptionReference CodesIssue Date
SOT549-1HTSSOP32plastic thermal enhanced thin shrink small outline package; 32 leads; body width 6.1 mm; lead pitch 0.65 mm; exposed die padMO-153 (JEDEC); 2005-11-02

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Quality, reliability & chemical content

Type numberOrderable part numberChemical contentRoHSLeadfree conversion dateRHFIFR (FIT)MTBF (hours)MSLMSL LF
UJA1075ATW/3V3UJA1075ATW/3V3,118UJA1075ATW/3V3Always Pb-free11
UJA1075ATW/3V3UJA1075ATW/3V3,112UJA1075ATW/3V3Always Pb-free11
UJA1075ATW/3V3/WDUJA1075ATW/3V3WD,1UJA1075ATW/3V3/WDAlways Pb-free11
UJA1075ATW/3V3/WDUJA1075ATW/3V3/WD,UJA1075ATW/3V3/WDAlways Pb-free11
UJA1075ATW/5V0UJA1075ATW/5V0,112UJA1075ATW/5V0Always Pb-free11
UJA1075ATW/5V0UJA1075ATW/5V0,118UJA1075ATW/5V0Always Pb-free11
UJA1075ATW/5V0/WDUJA1075ATW/5V0WD,1UJA1075ATW/5V0/WDAlways Pb-free11
UJA1075ATW/5V0/WDUJA1075ATW/5V0/WD,UJA1075ATW/5V0/WDAlways Pb-free11
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Documentation for this product

File nameTitleTypeFormatDate
UJA1075AHigh-speed CAN/ LIN core system basis chipData sheetpdf2011-01-28

Ordering & availability

Type numberOrdering code (12NC)Orderable part numberRegionDistributorIn stockOrder quantityInventory dateBuy onlineSamples
UJA1075ATW/3V39352 924 18118UJA1075ATW/3V3,118      not available
UJA1075ATW/3V39352 924 18112UJA1075ATW/3V3,112      not available
UJA1075ATW/3V3/WD9352 924 17118UJA1075ATW/3V3WD,1       
UJA1075ATW/3V3/WD9352 924 17112UJA1075ATW/3V3/WD,      not available
UJA1075ATW/5V09352 924 15112UJA1075ATW/5V0,112      not available
UJA1075ATW/5V09352 924 15118UJA1075ATW/5V0,118       
UJA1075ATW/5V0/WD9352 924 16118UJA1075ATW/5V0WD,1ASIAWPI8,000200005/22/2013Buy online 
UJA1075ATW/5V0/WD9352 924 16112UJA1075ATW/5V0/WD,      not available

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