STMicroelectronics (ST) L9663‑TR‑1, Automotive‑Grade Dual‑Channel PSI5 Bus Sensor Transceiver IC

Key Specifications

1. Communication and Protocol

Channels: 2 independent PSI5 transceiver channels, compliant with official PSI5 v1.3 / v2.1 standard protocols.

Encoding: Manchester coding with excellent electromagnetic interference (EMI) immunity.

Data rate: Default 125 kbps; three configurable rates: 83.3 kbps / 125 kbps / 189 kbps.

Host‑side interface: 32‑bit SPI bus (with address multiplexing), directly connectable to STM32 automotive‑grade MCUs.

2. Electrical Power‑Supply Characteristics

Operating voltage: 4.8 V ~ 35 V ultra‑wide automotive voltage range, compatible with 12 V / 24 V vehicle battery systems.

Integrated charge‑pump pre‑regulation circuit; spread‑spectrum frequency modulation to reduce EMC emissions.

Hardware protections: Reverse‑voltage protection, interface over‑current clamping, ground‑short‑circuit withstand capability (±1.5 V ground‑offset tolerance).

3. Package and Environmental Reliability

Package: VFQFPN28 (5 mm × 5 mm) with exposed thermal pad; SMT surface‑mount package offering high mechanical stability under vibration conditions.

Temperature grade: Automotive industrial grade, ‑40 ℃ ~ +140 ℃.

Qualification: AEC‑Q100 automotive‑electronic reliability qualification for harsh in‑vehicle operating environments.

Additional functions: High‑precision FLL timing block, interrupt output, power‑on reset configuration, two network topologies: point‑to‑point and multi‑drop bus mode.

Applications

1. Automotive Electronics

Safety systems: Signal acquisition for air‑bag accelerometers and crash pressure sensors.

Body control systems: Position feedback for door locks, window motors and seat actuators; chassis suspension displacement sensors.

Powertrain electronics: Transmission pressure sensors, brake‑system wheel‑speed / oil‑pressure sensors, engine‑vibration acquisition modules.

Centralized sensor‑collection hub for on‑vehicle ECU main boards.

2. Industrial Large‑Scale Inspection Drones

Redundant sensor acquisition for heavy‑lift industrial drone flight controllers: multi‑axis fuselage vibration sensors, arm‑deformation stress sensors, landing‑gear pressure‑detection sensors (PSI5‑protocol high‑precision industrial sensors).

On‑drone edge‑computing industrial control boxes adopting automotive‑ECU‑like architecture for multi‑channel external‑sensor bus aggregation.

Multi‑point pressure and temperature sensor bus acquisition for battery‑pack BMS systems of large‑capacity logistics drones.

3. Industrial Automation & Special‑Purpose Equipment

Bus modules for hydraulic‑pressure, inclination and vibration monitoring in construction machinery (excavators, loaders).

On‑board control units for rail‑transport vehicles; multi‑node sensor networking for railway‑inspection robots.

Distributed‑sensor signal transceivers for industrial equipment operating in harsh environments (high temperature, strong electromagnetic interference).

4. Other Harsh‑Condition Equipment

Electronic‑control systems for large agricultural plant‑protection machinery; pressure / arc‑detection sensor interfaces inside new‑energy energy‑storage cabinets; sensor acquisition boards for marine and on‑board equipment.