UJA1079ATW: LIN core system basis chip
The UJA1079A core System Basis Chip (SBC) replaces the basic discrete components commonly found in Electronic Control Units (ECU) with a Local Interconnect Network (LIN) interface.
The UJA1079A supports the networking applications used to control power and sensor peripherals by using the LIN interface as a local sub-bus.
The core SBC contains the following integrated devices:
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:
The UJA1079A is designed to be used in combination with a microcontroller. The SBC ensures that the microcontroller always starts up in a controlled manner.
sot549-1_3d
2.1 General
- Contains LIN ECU functions: 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 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 LIN bus pin and the wake-up pins ±6 kV ElectroStatic Discharge protection IEC 61000-4-2 on the LIN bus pin and the wake-up pins ±58 V short-circuit proof LIN bus pin Battery and LIN bus pins are protected against transients in accordance with ISO 7637-3
- Small 6.1 mm × 11 mm HTSSOP32 package with low thermal resistance
- Pb-free; Restriction of Hazardous Substances Directive (RoHS) and dark green compliant
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
Power management
- Wake-up via 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
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 undervoltage, 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
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 ISO16750-2
- Stable output under all conditions
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| LIN core system basis chip (REV 2.0) PDF (325.0 kB) UJA1079A | 31 Jan 2011 |
Package Information (1)
| Name/Description | Modified Date |
|---|---|
| plastic thermal enhanced thin shrink small outline package; 32 leads; body width 6.1 mm; lead pitch 0.65 mm; exposed die... (REV 1.0) PDF (380.0 kB) SOT549-1 | 08 Feb 2016 |
Ordering Information
| Product | Status | Product category | Category | Supported standards | Package name | Low power modes | Supply voltage [min] (V) | Package version | Supply voltage [max] (V) | Data rate [min] (kb/s) | Data rate [max] (kb/s) | CAN channels | LIN channels | Voltage on bus pins [min] (V) | Voltage on bus pins [max] (V) | VESD IEC61000-4-2 (kV) | FlexRay Channels | VESD HBM on bus pins (+/- kV) | VIO option available | Application | Recommended Version | Tvj [max] (°C) | Rth(j-a) (K/W) | SPLIT pin | Under-voltage detection | TX Dominant Time out | Over-temperature detection | INH / Wake Pin | Min High Input Levels (V) | No of pins |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UJA1079ATW/5V0/1 | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA | ||||||||||||
| UJA1079ATW/5V0/WD/1 | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA | ||||||||||||
| UJA1079ATW/5V0 | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA | ||||||||||||
| UJA1079ATW/3V3 | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA | ||||||||||||
| UJA1079ATW/3V3/WD/1 | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA | ||||||||||||
| UJA1079ATW/3V3/1 | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA | ||||||||||||
| UJA1079ATW/5V0/WD | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA | ||||||||||||
| UJA1079ATW/3V3/WD | Active | SBC; LIN Transceiver | LIN 2.1; LIN 2.0; SAE J2602; compatible with LIN 1.3 | HTSSOP32 | Standby Mode; Sleep Mode | 4.5 | 40 | 1 | 20 | 0 | 1 | -58 | 58 | 6 | 8 | No | Yes | 250mA |
Package Information
| Product ID | Package Description | Outline Version | Reflow/Wave Soldering | Packing | Product Status | Part NumberOrdering code(12NC) | Marking | Chemical Content | RoHS / Pb Free / RHF | LeadFree Conversion Date | MSL | MSL LF |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UJA1079ATW/3V3 | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/3V3,118 (9352 924 39118) | Standard Marking | UJA1079ATW/3V3 |    | Always Pb-free | 1 | 1 | |
| UJA1079ATW/3V3/1 | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/3V3/1J (9353 064 28118) | Standard Marking | UJA1079ATW/3V3/1 | | Always Pb-free | 1 | 1 | |
| UJA1079ATW/3V3/WD | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/3V3/WD, (9352 924 42118) | Standard Marking | UJA1079ATW/3V3/WD | | Always Pb-free | 1 | 1 | |
| UJA1079ATW/3V3/WD/1 | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/3V3/WDJ (9353 064 31118) | Standard Marking | UJA1079ATW/3V3/WD/1 | | Always Pb-free | 1 | 1 | |
| UJA1079ATW/5V0 | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/5V0,118 (9352 924 38118) | Standard Marking | UJA1079ATW/5V0 | | Always Pb-free | 1 | 1 | |
| UJA1079ATW/5V0/1 | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/5V0/1J (9353 064 27118) | Standard Marking | UJA1079ATW/5V0/1 | | Always Pb-free | 1 | 1 | |
| UJA1079ATW/5V0/WD | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/5V0WD,1 (9352 924 41118) | Standard Marking | UJA1079ATW/5V0/WD | | Always Pb-free | 1 | 1 | |
| UJA1079ATW/5V0/WD/1 | | SOT549-1 | Reel 13" Q1/T1 | Active | UJA1079ATW/5V0/WDJ (9353 064 29118) | Standard Marking | UJA1079ATW/5V0/WD/1 | | Always Pb-free | 1 | 1 |
- LIN core system basis chip uja1079atw
