STMicroelectronics ASM330LHHXTR

Overview

ASM330LHHXTR from STMicroelectronics is a 6-axis automotive-grade inertial measurement unit (IMU) integrating a 3-axis digital accelerometer (±2/±4/±8/±16 g FS) and 3-axis digital gyroscope (±125 to ±4000 dps FS), with embedded finite state machine (FSM) and machine learning core (MLC) for on-sensor motion pattern recognition. It operates from −40°C to +105°C, supports I²C, MIPI I3C℠, and SPI interfaces, and delivers synchronized six-channel output for dead reckoning in telematics and V2X systems.

For engineers reviewing the ASM330LHHXTR datasheet, ASM330LHHXTR pinout, ASM330LHHXTR application, or ASM330LHHXTR equivalent, this IMU offers AEC-Q100 qualification, Android Auto™/CarPlay® compliance, programmable interrupts (INT1/INT2), 3 KB embedded FIFO, and dual operating modes-enabling low-power vehicle motion sensing without host processor overhead.

Technical Context

The ASM330LHHXTR implements a tightly synchronized dual-sensor architecture where accelerometer and gyroscope data paths share timestamping and FIFO buffering to ensure sub-millisecond inter-sensor alignment-critical for sensor fusion in dead reckoning. Its FSM supports up to 16 independent state machines for real-time vehicle status detection (e.g., stationary/motion, shock), while the MLC executes up to 8 concurrent decision trees using configurable "if-then-else" nodes on raw or filtered sensor data.

It features two distinct interface modes: Mode 1 enables standard I²C/SPI/MIPI I3C℠ communication; Mode 2 adds I²C master capability (via MSCL/MSDA pins) to drive external sensors (e.g., magnetometers), forming a full sensor hub supporting up to six total inputs. Power management includes dedicated low-power accelerometer mode (as low as 7 µA at 1.6 Hz ODR) and combo-mode current consumption of 470–800 µA at 12.5–52 Hz.

Key Specifications

Pinout & Package

ASM330LHHXTR is housed in a compact 14-pin LGA package (2.5 × 3.0 × 0.83 mm³) with exposed pad for thermal and mechanical stability in automotive under-hood environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 6-axis automotive IMU applications.

Compared with LSM6DSRTR and ICM-42688-P, the ASM330LHHXTR uniquely combines AEC-Q100 qualification, ±4000 dps gyroscope range, dual FSM/MLC engines, and I²C master sensor hub-making it the only choice for production automotive telematics requiring robust motion context generation across extended temperature and lifetime conditions.

Availability

ASM330LHHXTR is available at Aetrix Electronics and suitable for telematics gateways, V2X roadside units, and automotive crash data recorders requiring stable component supply, long-term lifecycle assurance, and AEC-Q100-compliant traceability.

Supply support for ASM330LHHXTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power technologies with over 40 years of MEMS manufacturing expertise.

The ASM330LHHXTR belongs to ST's automotive-qualified MEMS IMU product line, engineered specifically for nonsafety automotive applications-including telematics, V2X, and motion-activated functions-where high-temperature stability, embedded intelligence, and sensor fusion readiness are mandatory.

FAQ

What is the maximum gyroscope full-scale range supported by the ASM330LHHXTR?

The ASM330LHHXTR supports a gyroscope full-scale range of ±4000 dps-the highest among ST's AEC-Q100-qualified IMUs. This enables accurate capture of high-dynamic events such as rapid steering corrections or rollover detection without sensor saturation, validated across −40°C to +105°C with <±8% long-term sensitivity drift.

How does the embedded machine learning core (MLC) differ from the finite state machine (FSM)?

The FSM executes deterministic, low-latency state transitions (e.g., "if jerk > X g/ms, enter alarm state") using 16 independent programs, while the MLC performs probabilistic pattern classification (e.g., "driving vs. walking") via up to 8 concurrent decision trees with 512 configurable nodes. FSM runs on dedicated logic; MLC uses a fixed-function processor optimized for sensor data thresholds and feature extraction.

Can the ASM330LHHXTR interface with an external magnetometer, and if so, how?

Yes-using Mode 2 interface configuration, pins 2 (MSDA) and 3 (MSCL) become an I²C master port capable of driving external magnetometers (e.g., LIS3MDL). The sensor hub supports up to four external sensors, synchronizing their data with internal accel/gyro readings in hardware, eliminating software timestamp misalignment in fused heading calculations.

What power-saving features make the ASM330LHHXTR suitable for always-on automotive applications?

It offers three key low-power mechanisms: (1) Accelerometer-only mode drawing just 7 µA at 1.6 Hz ODR; (2) Combo-mode current of 470 µA at 12.5 Hz with synchronized 6-axis output; and (3) Event-driven operation where FSM/MLC interrupts wake the host only on relevant motion-reducing average system power by >60% versus continuous polling architectures.