UJA1066TW: High-speed CAN fail-safe system basis chip
The UJA1066 fail-safe System Basis Chip (SBC) replaces basic discrete components which are common in every Electronic Control Unit (ECU) with a Controller Area Network (CAN) interface. The fail-safe SBC supports all networking applications that control various power and sensor peripherals by using high-speed CAN as the main network interface. The fail-safe SBC contains the following integrated devices:
In addition to the advantages of integrating these common ECU functions in a single package, the fail-safe SBC offers an intelligent combination of system-specific functions such as:
The UJA1066 is designed to be used in combination with a microcontroller that incorporates a CAN controller. The fail-safe SBC ensures that the microcontroller is always started up in a defined manner. In failure situations, the fail-safe SBC will maintain microcontroller functionality for as long as possible to provide a full monitoring and software-driven fallback operation.
The UJA1066 is designed for 14 V single power supply architectures and for 14 V and 42 V dual power supply architectures.
sot549-1_3d
2.1 General
- Contains a full set of CAN ECU functions: CAN transceiver Voltage regulator for the microcontroller (3.3 V or 5.0 V) Separate voltage regulator for the CAN transceiver (5 V) Enhanced window watchdog with on-chip oscillator Serial Peripheral Interface (SPI) for the microcontroller ECU power management system Fully integrated autonomous fail-safe system
- Designed for automotive applications: Supports 14 V and 42 V architectures Excellent ElectroMagnetic Compatibility (EMC) performance ±8 kV ElectroStatic Discharge (ESD) protection Human Body Model (HBM) for off-board pins ±4 kV ElectroStatic Discharge (ESD) protection IEC 61000-4-2 for off-board pins ±60 V short-circuit proof CAN-bus pins Battery and CAN-bus pins are protected against transients in accordance with ISO 7637-3 Very low sleep current
- Supports remote flash programming via the CAN-bus
- Small 8 mm × 11 mm HTSSOP32 package with low thermal resistance
2.2 CAN transceiver
- ISO 11898-2 and ISO 11898-5 compliant high-speed CAN transceiver
- Enhanced error signalling and reporting
- Dedicated low dropout voltage regulator for the CAN-bus: Independent of the microcontroller supply Guarded by CAN-bus failure management Significantly improves EMC performance
- Partial networking option with global wake-up feature; allows selective CAN-bus communication without waking up sleeping nodes
- Bus connections are truly floating when power is off
- SPLIT output pin for stabilizing the recessive bus level
2.3 Power management
- Smart operating modes and power management modes
- Cyclic wake-up capability in Standby and Sleep modes
- Local wake-up input with cyclic supply feature
- Remote wake-up capability via the CAN-bus
- External voltage regulators can easily be incorporated into the power supply system (flexible and fail-safe)
- 42 V battery-related high-side switch for driving external loads such as relays and wake-up switches
- Intelligent maskable interrupt output
2.4 Fail-safe features
- Safe and predictable behavior under all conditions
- Programmable fail-safe coded window and time-out watchdog with on-chip oscillator, guaranteeing autonomous fail-safe system supervision
- Fail-safe coded 16-bit SPI interface for the microcontroller
- Global enable pin for the control of safety-critical hardware
- Detection and detailed reporting of failures: On-chip oscillator failure and watchdog alerts Battery and voltage regulator undervoltages CAN-bus failures (short circuits and open-circuit bus wires) TXD and RXD clamping situations and short circuits Clamped or open reset line SPI message errors Overtemperature warning ECU ground shift (two selectable thresholds)
- Rigorous error handling based on diagnostics
- Supply failure early warning allows critical data to be stored
- 23 bits of access-protected RAM available (e.g. for logging cyclic problems)
- Reporting in a single SPI message; no assembly of multiple SPI frames needed
- Limp-home output signal for activating application hardware in case system enters Fail-safe mode (e.g. for switching on warning lights)
- Fail-safe coded activation of Software development mode and Flash mode
- Unique SPI readable device type identification
- Software-initiated system reset
Data Sheets (1)
| Name/Description | Modified Date |
|---|---|
| High-speed CAN fail-safe system basis chip (REV 3.0) PDF (460.0 kB) UJA1066 | 17 Mar 2010 |
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) | FlexRay Channels | VESD IEC61000-4-2 (kV) | VESD HBM on bus pins (+/- kV) | VIO option available | Application | Recommended Version | Tvj [max] (°C) | SPLIT pin | Under-voltage detection | TX Dominant Time out | Over-temperature detection | INH / Wake Pin | Min High Input Levels (V) | No of pins |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UJA1066TW/3V3/T | Active | SBC; High-Speed CAN; Fail-safe SBC | ISO-11898-2; ISO-11898-5 | HTSSOP32 | Standby Mode; Sleep Mode | 5.5 | 33 | 18 | 1000 | 1 | 0 | -60 | 60 | 4 | 8 | No | Yes | 150mA | |||||||||||
| UJA1066TW/5V0/T | Active | SBC; High-Speed CAN; Fail-safe SBC | ISO-11898-2; ISO-11898-5 | HTSSOP32 | Standby Mode; Sleep Mode | 5.5 | 33 | 18 | 1000 | 1 | 0 | -60 | 60 | 4 | 8 | No | Yes | 150mA | |||||||||||
| UJA1066TW | No Longer Manufactured | SBC; High-Speed CAN; Fail-safe SBC | SBC | ISO-11898-2; ISO-11898-5 | HTSSOP32 | Standby Mode; Sleep Mode | 5.5 | SOT549-1 | 33 | 18 | 1000 | 1 | 0 | -60 | 60 | 0 | 4 | 8 | No | Yes | 150mA | -40~150 | Yes | Yes | Yes | Yes | Yes | 0.7 x Vv1 | 32 |
| UJA1066TW/5V0 | No Longer Manufactured | SBC; High-Speed CAN; Fail-safe SBC | ISO-11898-2; ISO-11898-5 | HTSSOP32 | Standby Mode; Sleep Mode | 5.5 | 33 | 18 | 1000 | 1 | 0 | -60 | 60 | 4 | 8 | No | Yes | 150mA | |||||||||||
| UJA1066TW/3V3 | No Longer Manufactured | SBC; High-Speed CAN; Fail-safe SBC | ISO-11898-2; ISO-11898-5 | HTSSOP32 | Standby Mode; Sleep Mode | 5.5 | 33 | 18 | 1000 | 1 | 0 | -60 | 60 | 4 | 8 | No | Yes | 150mA | |||||||||||
| UJA1066TW/3V0 | No Longer Manufactured | SBC; High-Speed CAN; Fail-safe SBC | ISO-11898-2; ISO-11898-5 | HTSSOP32 | Standby Mode; Sleep Mode | 5.5 | 33 | 18 | 1000 | 1 | 0 | -60 | 60 | 4 | 8 | No | Yes | 150mA |
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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UJA1066TW/3V3/T | | SOT549-1 | Reel 13" Q1/T1 in Drypack | Active | UJA1066TW/3V3/T,51 (9352 888 69518) | Standard Marking | UJA1066TW/3V3/T |    | Always Pb-free | 3 | 3 | |
| Tube in Drypack | Active | UJA1066TW/3V3/T (9352 888 69512) | Standard Marking | UJA1066TW/3V3/T | | Always Pb-free | 3 | 3 | ||||
| UJA1066TW/5V0/T | | SOT549-1 | Reel 13" Q1/T1 in Drypack | Active | UJA1066TW/5V0/T,51 (9352 888 71518) | Standard Marking | UJA1066TW/5V0/T | | Always Pb-free | 3 | 3 | |
| Tube in Drypack | Active | UJA1066TW/5V0/T (9352 888 71512) | Standard Marking | UJA1066TW/5V0/T | | Always Pb-free | 3 | 3 |
