NXP Semiconductors UJA1076TW/5V0,112

Overview

UJA1076TW/5V0,112 from NXP Semiconductors is a high-speed CAN core System Basis Chip (SBC) integrating a CAN transceiver compliant with ISO 11898-2/5, a 5 V ±2 % main voltage regulator delivering up to 250 mA, a dedicated 5 V CAN transceiver regulator, SPI interface, dual local wake-up inputs, and limp-home output - designed for automotive ECU power and communication management.

For engineers reviewing the UJA1076TW/5V0,112 datasheet, UJA1076TW/5V0,112 pinout, UJA1076TW/5V0,112 application, or UJA1076TW/5V0,112 equivalent, this SBC delivers deterministic system startup, bus-level wake-up detection, programmable watchdog behavior, and thermal-safe operation in HTSSOP32 packaging - critical for automotive body control, gateway, and ADAS domain controllers requiring robust CAN network integration.

Technical Context

The UJA1076TW/5V0,112 implements a state-machine-based system controller managing Off/Standby/Normal/Sleep/Overtemp modes with precise voltage monitoring (V1 undervoltage at 90 % or 70 % threshold, V2 undervoltage warning), configurable wake-up sampling (16 ms or 64 ms), and SPI-controlled register access across WD_and_Status, Mode_Control, Int_Control, and Int_Status maps.

Its CAN transceiver features floating bus pins in Off mode, SPLIT output for recessive level stabilization, ±58 V short-circuit protection on CANH/CANL, and independent low-dropout regulation - decoupling transceiver supply from microcontroller rail to improve EMC performance per ISO 7637-3 and IEC 61000-4-2.

Key Specifications

Pinout & Package

HTSSOP32 package (SOT549-1) with 32 leads, 6.1 mm body width, 0.65 mm lead pitch, and thermally enhanced exposed die pad (electrically isolated, may be left floating or connected to GND).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar CAN SBC applications.

Compared with TJA1042TK/3, UJA1076TW/5V0,112 reduces BOM count by integrating power, interface, and supervision - whereas UJA1075TW/5V0,112 offers identical integration without watchdog, simplifying qualification where ASIL-B monitoring is handled elsewhere.

Availability

UJA1076TW/5V0,112 is available at Aetrix Electronics and suitable for automotive body control, gateway ECU, ADAS domain controller, and electric power steering applications requiring stable component supply, long-term lifecycle support, and AEC-Q100 qualified components.

Supply support for UJA1076TW/5V0,112 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor leader specializing in secure connectivity solutions for automotive, industrial, and IoT markets, with deep expertise in CAN, SBC, and functional safety technologies.

The UJA1076TW/5V0,112 belongs to NXP's System Basis Chip product line, engineered specifically for automotive electronic control units needing integrated power management, high-speed CAN communication, and robust fault handling in harsh environments.

FAQ

What is the nominal output voltage and accuracy of the main regulator in UJA1076TW/5V0,112?

The UJA1076TW/5V0,112 features a 5 V main voltage regulator (V1) with ±2 % output voltage accuracy across temperature and load conditions. This precision enables reliable operation of automotive-grade microcontrollers and peripherals without additional post-regulation filtering. The regulator delivers up to 250 mA and supports external PNP transistor augmentation for thermal distribution - a key design feature confirmed in the official NXP datasheet Rev. 02.

Does UJA1076TW/5V0,112 include an integrated watchdog timer, and how is it configured?

Yes, UJA1076TW/5V0,112 includes a programmable watchdog with Window, Timeout, and Off modes, clocked by an on-chip oscillator independent of V1/V2 supplies. Configuration occurs via the WD_and_Status register (bits WMC and NWP), where NWP sets the period (default 128 ms) and WMC selects mode per operating state. The WDOFF pin provides hardware disable capability - all details are specified in Section 6.4 of the UJA1076TW/5V0,112 datasheet.

What package type and thermal characteristics does UJA1076TW/5V0,112 use?

UJA1076TW/5V0,112 uses the HTSSOP32 package (SOT549-1), measuring 6.1 mm × 11 mm with 0.65 mm lead pitch and an exposed die pad for enhanced thermal dissipation. The pad is electrically isolated and may be left floating or connected to GND. This thermally optimized construction supports operation under automotive cranking conditions (VBAT ≥ 4.5 V) and meets AEC-Q100 Grade 1 requirements per NXP documentation.

How does UJA1076TW/5V0,112 handle wake-up events from the CAN bus and local inputs?

UJA1076TW/5V0,112 supports wake-up via CAN bus activity (through RXDC) and two dedicated local inputs (WAKE1/WAKE2). Wake detection is configurable via SPI registers: STBCC bit enables bus wake-up in Lowpower mode, while WIC1/WIC2 bits define edge sensitivity. WBIAS pin provides bias control with selectable 16 ms or 64 ms sampling - ensuring ultra-low standby current while maintaining full wake-up responsiveness as verified in Sections 6.1.3 and 6.2.5 of the datasheet.

What safety and protection features are built into UJA1076TW/5V0,112 for automotive use?

UJA1076TW/5V0,112 integrates multiple automotive-grade protections: ±58 V short-circuit tolerance on CANH/CANL, ±8 kV HBM / ±6 kV IEC 61000-4-2 ESD on CAN/wake pins, ISO 7637-3 transient immunity on BAT/CAN, overtemperature shutdown with LIMP activation, and V1/V2 undervoltage detection with interrupt signaling. These features are validated per AEC-Q100 and documented in Sections 2.1–2.5 of the official NXP UJA1076TW/5V0,112 product data sheet.