NXP Semiconductors MC33912G5ACR2

Overview

MC33912G5ACR2 from NXP Semiconductors is a second-generation LIN System Basis Chip (SBC) with integrated dc motor pre-driver, current sense, 5.0 V LDO regulator (60 mA), two 50 mA high-side and two 150 mA low-side protected switches, and a LIN 2.0/2.1-compliant transceiver - designed for automotive body control modules including window lift, seat position, and mirror actuation.

For engineers reviewing the MC33912G5ACR2 datasheet, MC33912G5ACR2 pinout, MC33912G5ACR2 application, or MC33912G5ACR2 equivalent, this device delivers SPI-configurable diagnostics, selectable window watchdog, wake-up via LIN bus or four high-voltage inputs (L1–L4), and analog multiplexed HV sensing - critical for robust, fault-tolerant automotive subsystems.

Technical Context

The MC33912G5ACR2 integrates LIN physical layer with waveshaping (disableable for >100 kbps operation), full-duplex SPI up to 4.0 MHz, and SMARTMOS-based power management. Its three operating modes - Normal (full functionality), Sleep (VDD off, wake via LIN/Lx/cyclic sense), and Stop (VDD on, limited current) - enable precise power-state orchestration in battery-sensitive ECUs.

It features dual current-sense paths (ISENSEH/ISENSEL) with programmable gain (14× or 29×), analog multiplexer supporting voltage division ratios of 1.0× or 3.6× for Lx inputs, and independent overtemperature shutdown for HS/LS/LIN blocks - each with dedicated flags readable via SPI status registers.

Key Specifications

Pinout & Package

MC33912G5ACR2 is housed in a 32-pin LQFP (7 mm × 7 mm, 0.8 mm pitch) package with exposed thermal pad. Pin assignments follow NXP's standardized layout for automotive SBCs, with dedicated AGND, LGND, and PGND pins for noise isolation and thermal management.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LIN system basis chip applications.

Compared with MC33912BACR2 and MC34912G5ACR2, the MC33912G5ACR2 delivers higher LIN ESD robustness (±6.0 kV), verified J2602 conformance, and extended 125°C operation - making it the preferred choice for new automotive body electronics designs demanding full AEC-Q100 Grade 1 qualification and long-term reliability in harsh environments.

Availability

MC33912G5ACR2 is available at Aetrix Electronics and suitable for automotive door modules, seat position systems, mirror adjustment units, and climate control actuators requiring stable component supply, AEC-Q100 qualification, and long-term production continuity.

Supply support for MC33912G5ACR2 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 applications, with deep expertise in automotive-grade mixed-signal ICs and functional safety design.

The MC33912G5ACR2 belongs to NXP's System Basis Chip product line, engineered specifically for automotive body electronics - integrating power regulation, communication, and protected switching to reduce ECU complexity and improve ASIL-ready system robustness.

FAQ

What is the maximum LIN bus data rate supported by the MC33912G5ACR2?

The MC33912G5ACR2 supports LIN communication up to 100 kbps when waveshaping is enabled per LIN 2.0/2.1 specifications. Waveshaping can be disabled via SPI configuration to allow higher data rates in custom implementations, though official compliance applies only up to 100 kbps. The physical layer meets SAE J2602-2 requirements including undervoltage detection and hysteresis.

Does the MC33912G5ACR2 include built-in current sensing for motor control?

Yes, the MC33912G5ACR2 integrates a dedicated current sense amplifier with differential inputs ISENSEH and ISENSEL. It offers programmable gain (14× or 29×) and auto-zero mode, delivering ±15 mV input offset accuracy. This enables precise shunt-based current measurement for DC motor phase control and pinch detection without external amplification circuitry.

How does the MC33912G5ACR2 manage power states in automotive sleep mode?

In Sleep mode, the MC33912G5ACR2 disables its VDD regulator to achieve ultra-low quiescent current (as low as 33 µA at 13.5 V supply), while retaining wake-up capability via LIN bus activity, L1–L4 inputs, cyclic sense, or forced wake command. All internal logic except wake detection circuitry is powered down, and VDD is off - minimizing battery drain during vehicle key-off periods.

Can the MC33912G5ACR2 drive Hall-effect sensors directly?

Yes, the MC33912G5ACR2 provides a dedicated 5.0 V switched output (HVDD) capable of supplying up to 35 mA, specifically designed to power Hall-effect sensors. It includes dropout voltage ≤300 mV at 15 mA load and line/load regulation within ±40 mV - ensuring stable biasing for position and speed sensing in motor control applications.

What package type and thermal performance does the MC33912G5ACR2 use?

The MC33912G5ACR2 uses a 32-pin LQFP package (7 mm × 7 mm, 0.8 mm pitch) with exposed thermal pad. Its thermal resistance is R_θJA = 56°C/W (4-layer board) and R_θJC = 23°C/W, enabling reliable operation up to 125°C ambient. Overtemperature shutdown triggers at 140–150°C junction temperature with 10°C hysteresis for HS, LS, and LIN blocks independently.