STMicroelectronics ASM330LHBTR

Overview

ASM330LHBTR from STMicroelectronics is a 6-axis inertial measurement unit (IMU) integrating a 3-axis digital accelerometer and 3-axis digital gyroscope in a single LGA-14 package. It delivers ASIL B compliance when paired with ST's certified ISO 26262:2018 software library, supports ±16 g acceleration and ±4000 dps angular rate full-scale ranges, operates from −40 °C to +105 °C, and enables dead-reckoning in automotive telematics and V2X systems.

For engineers reviewing the ASM330LHBTR datasheet, ASM330LHBTR pinout, ASM330LHBTR application, or ASM330LHBTR equivalent, key selection criteria include its dual-mode power operation (high-performance/low-power), embedded finite state machine (16-state), machine learning core (8 concurrent flows), 3 KB FIFO, and triple interface support (I²C, SPI, MIPI I3C℠) for sensor-fusion–critical ADAS and active suspension designs.

Technical Context

The ASM330LHBTR implements synchronized 6-channel output with hardware timestamping to eliminate inter-sensor skew-critical for real-time dead reckoning. Its dual-mode architecture allows independent ODR configuration: accelerometer supports 1.6 Hz to 1667 Hz, gyroscope 12.5 Hz to 1667 Hz, with low-power mode enabling 7 µA accelerometer current at 1.6 Hz.

On-chip intelligence includes a programmable finite state machine (FSM) for motion-state detection (e.g., vehicle stationary/moving) and a machine learning core (MLC) that executes up to 512 configurable "if-then-else" nodes on accelerometer/gyroscope data-offloading activity classification (e.g., walking vs. driving) from the host processor without external computation.

Key Specifications

Pinout & Package

ASM330LHBTR is housed in a 2.5 mm × 3.0 mm × 0.83 mm plastic land grid array (LGA-14L) package with bottom-side solder pads and no exposed thermal pad. The package supports automated optical inspection (AOI) and reflow-compatible assembly per TN0018.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LSM6DSOXTR and ICM-42688-P, ASM330LHBTR uniquely integrates ASIL B–ready firmware, on-sensor MLC/FSM, and extended ±4000 dps gyro range in an automotive-qualified LGA package-enabling standalone safety-compliant motion processing without host dependency.

Availability

ASM330LHBTR is available at Aetrix Electronics and suitable for ADAS sensor fusion, V2X telematics, active suspension control, and door/trunk module sensing requiring stable component supply across automotive production lifecycles.

Supply support for ASM330LHBTR 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, with vertically integrated MEMS manufacturing and automotive qualification expertise.

The ASM330LHBTR belongs to ST's automotive-grade IMU product line, designed specifically for ASIL B–compliant dead reckoning, sensor fusion, and motion-triggered safety functions in harsh-temperature vehicle environments.

FAQ

Is ASM330LHBTR pin-compatible with other ST IMUs like LSM6DSOXTR?

No. Although both use LGA-14 packages, ASM330LHBTR pin 12 (CS) controls interface mode selection, whereas LSM6DSOXTR uses pin 12 as SDO. Pin 9 (INT2/DEN) and pins 2–3 (RES) also differ functionally. Direct replacement requires PCB layout revision and firmware adaptation.

What software tools does ST provide to configure the machine learning core?

ST provides Unico-GUI with the UM3134 application note, enabling drag-and-drop MLC flow design, node configuration, and register-level validation. The AN5915 application note details feature extraction, threshold tuning, and result register mapping for custom motion classification models.

Does ASM330LHBTR require external calibration for ASIL B compliance?

No. Factory calibration covers sensitivity, offset, and cross-axis errors across −40 °C to +105 °C. ASIL B compliance relies on using ST's certified ISO 26262:2018 software library (AN5691) and implementing dual-IMU redundancy per safety manual guidelines-not on field recalibration.

Can the finite state machine operate independently of the host processor?

Yes. Once programmed via I²C/SPI, the FSM runs autonomously on sensor data without host intervention. It consumes negligible power (<10 µA) and triggers INT1/INT2 upon state transition-enabling ultra-low-power wake-up and event detection in sleep-mode vehicle modules.