UJA1061TW/3V3/C/T,

Specialized Overview

The UJA1061TW/3V3/C/T is a fail-safe System Basis Chip (SBC) integrating fault-tolerant CAN and LIN transceivers with power management for automotive ECUs. It provides a dedicated 3.3 V regulator for the microcontroller and a separate 5 V regulator for the CAN transceiver. The device supports 14 V, 24 V, and 42 V architectures via BAT14 and BAT42 inputs. It features an advanced watchdog with window and time-out modes, an on-chip oscillator, and a fail-safe coded SPI interface. The component operates within a temperature range of -40 °C to +125 °C and is housed in a 32-lead HTSSOP package.

Specialized Feature Summary

• Integrates ISO 11898-3 compliant fault-tolerant CAN transceiver and LIN 2.0 transceiver with enhanced error signaling.
• Provides autonomous fail-safe system supervision using a programmable watchdog and on-chip oscillator.
• Supports intelligent power management with multiple operating modes including Standby, Sleep, and Flash programming.
• Features detailed status reporting and failure detection for voltage regulators, bus lines, and internal components.

Specialized Applications

• Automotive Electronic Control Units (ECUs)
• Fault-tolerant CAN networking applications
• Local Interconnect Network (LIN) sub-bus systems

Specialized Procurement Notes

Verify the specific ordering suffix matches the required voltage regulator output; the 3V3 variant supplies 3.3 V to the microcontroller. Confirm package type and tape-and-reel specifications against the official datasheet before procurement. Ensure compatibility with the target microcontroller's CAN controller interface requirements.

Specialized Selection Notes

Select this component when a combined CAN/LIN interface and robust power management are required in a single package. The 3.3 V version is necessary for microcontrollers requiring that specific supply voltage. Consider the fail-safe capabilities and low-power modes for applications demanding high system reliability and energy efficiency.

Specialized Part Context

The UJA1061 series replaces discrete ECU components by integrating CAN/LIN interfaces and power regulation. The TW/3V3/C/T designation indicates the HTSSOP32 package, 3.3 V microcontroller supply, commercial temperature grade, and tape-and-reel packaging. It serves as a central control unit for automotive networking subsystems.

Specialized Replacement Considerations

Check pinout compatibility and regulator voltage outputs when substituting. Verify that alternative SBCs support the same fault-tolerant CAN and LIN standards. Ensure the replacement offers equivalent fail-safe behavior and SPI interface coding for seamless integration.

Specialized FAQ

What is the function of the INH/LIMP output pin?

The INH/LIMP pin serves as an inhibit or limp-home output signal. It activates application hardware, such as warning lights, when the system enters Fail-safe mode.

How does the device handle oscillator failures?

If the on-chip oscillator frequency is too low or stops running, the SBC immediately transitions to Fail-safe mode to prevent blind spots in system supervision.

Can the UJA1061 support remote flash programming?

Yes, the device supports remote flash programming via the CAN-bus using a specific fail-safe control sequence involving Mode register writes.