STMicroelectronics (ST) L9663-TR-1 Automotive-Grade 2-Channel PSI5 Bus Sensor Transceiver IC

Core Key Parameters

1. Communication and Protocols

Channels: 2 independent PSI5 transceiver channels, compliant with official PSI5 v1.3 / v2.1 standard protocolsEncoding: Manchester coding with excellent immunity to electromagnetic interferenceData transfer rate: Default 125 kbps, three configurable options: 83.3 kbps / 189 kbpsHost interface: 32-bit SPI bus with address multiplexing, directly connectable to STM32 automotive-grade MCUs

2. Electrical Power Specifications

Operating voltage: Ultra-wide automotive voltage range of 4.8V ~ 35V (compatible with 12V/24V vehicle battery systems)Integrated charge pump pre-regulation circuit and spread-spectrum frequency modulation to reduce EMC radiationHardware protections: Reverse polarity protection, interface overcurrent clamping, ground short-circuit tolerance (±1.5V ground offset fault tolerance)

3. Package & Environmental Reliability

Package: VFQFPN28 (5mm×5mm) with exposed thermal pad, SMD SMT package for high mechanical stability under vibration conditionsTemperature grade: Automotive grade, -40℃ ~ +140℃Certification: AEC-Q100 automotive electronic reliability qualification for harsh on-board environmentsAdditional functions: High-precision FLL timing block, interrupt output, power-on reset configuration, two network topologies (point-to-point / bus topology)

III. Application Scope

1. Automotive Electronics

• Safety systems: Signal acquisition for airbag acceleration sensors and crash pressure sensors

• Body control systems: Position feedback for door locks, window motors and seat actuators, as well as chassis suspension displacement sensors

• Powertrain electronic control: Transmission pressure sensors, brake wheel speed / oil pressure sensors and engine vibration acquisition modules

• Centralized sensor collection hub for vehicle ECU main control boards

2. Industrial Grade Large Inspection UAVs

• Redundant sensor collection for flight controllers of heavy-lift industrial UAVs: multi-axis fuselage vibration sensors, arm deformation stress sensors and landing gear pressure detection sensors (high-precision industrial PSI5 protocol sensors)

• On-board edge computing industrial control boxes for UAVs, adopting vehicle ECU architecture to aggregate multiple external sensor buses

• Multi-point pressure and temperature bus collection for battery PACK BMS systems of large logistics UAVs

3. Industrial Automation & Special Equipment

• Hydraulic pressure, tilt and vibration monitoring bus modules for construction machinery (excavators, loaders)

• Multi-node sensor networking for railway on-board control units and track inspection robots

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

4. Other Harsh Working Condition Equipment

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