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NXP Semiconductors Electronic Components Datasheet

UJA1066 Datasheet

High-speed CAN fail-safe system basis chip

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UJA1066
High-speed CAN fail-safe system basis chip
Rev. 03 — 17 March 2010
Product data sheet
1. General description
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:
High-speed CAN transceiver, interoperable and downward compatible with CAN
transceiver TJA1041 and TJA1041A, and compatible with the ISO 11898-2 standard
and the ISO 11898-5 standard (in preparation)
Advanced independent watchdog
Dedicated voltage regulators for microcontroller and CAN transceiver
Serial peripheral interface (full duplex)
Local wake-up input port
Inhibit/limp-home output port
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:
Advanced low-power concept
Safe and controlled system start-up behavior
Advanced fail-safe system behavior that prevents any conceivable deadlock
Detailed status reporting on system and subsystem levels
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.


NXP Semiconductors Electronic Components Datasheet

UJA1066 Datasheet

High-speed CAN fail-safe system basis chip

No Preview Available !

NXP Semiconductors
UJA1066
High-speed CAN fail-safe system basis chip
2. Features and benefits
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
UJA1066_2
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 03 — 17 March 2010
© NXP B.V. 2010. All rights reserved.
2 of 70


Part Number UJA1066
Description High-speed CAN fail-safe system basis chip
Maker NXP
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UJA1066 Datasheet PDF






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