Overview
The L9663 is an automotive PSI5 (Peripheral Sensor Interface 5) transceiver IC developed by STMicroelectronics. This device is designed to meet the stringent requirements of automotive applications, particularly in safety-critical systems such as airbags, power train, chassis, and other safety-related domains. The L9663 is AEC-Q100 qualified, ensuring its reliability and performance in harsh automotive environments. It supports both PSI5 revisions 1.3 and 2.x, making it versatile for various application needs.
Key Specifications
| Specification | Details |
|---|---|
| Compatibility | PSI5 revisions 1.3 and 2.x |
| Data Transmission | Manchester coded digital data transmission |
| Data Transmission Speed | 125 kbps (optional 83.3 kbps and 189 kbps) |
| EMC Robustness | High EMC robustness and low emission |
| Bootstrap Circuits | Bootstrap circuits for sync pulses |
| Current Limitation and Voltage Clamp | Current limitation and voltage clamp on interface pins |
| Integrated Charge Pump | Integrated charge pump stage for pre-regulation with spread spectrum approach |
| FLL Module | Integrated FLL module for high accuracy timing control |
| Reverse Voltage Protection | Reverse voltage protection structure |
| Ground Shift Tolerance | Short to ground tolerant with ±1.5 V ground shift |
| SPI Interface | 32-bit SPI interface with address multiplexing |
| Operating Voltage | VB = 4.8 V (5.2 V for sync pulses) |
| Package Options | TQFP32 (Exposed pad), VFQFPN28 |
Key Features
- AEC-Q100 qualified for automotive reliability
- Supports PSI5 revisions 1.3 and 2.x
- Manchester coded digital data transmission with speeds up to 189 kbps
- High EMC robustness and low emission
- Bootstrap circuits for sync pulses and integrated charge pump stage
- Integrated FLL module for high accuracy timing control
- Reverse voltage protection and short to ground tolerance
- 32-bit SPI interface with address multiplexing
- Flexible power supply configurations and voltage regulation
- Timeslot monitoring (TSM) for frame monitoring and diagnostic checks
Applications
The L9663 is primarily used in automotive safety-critical systems, including:
- Airbag systems
- Power train applications
- Chassis and safety applications
- Other automotive domains requiring robust and reliable sensor interfaces
Q & A
- What is the L9663 used for?
The L9663 is an automotive PSI5 transceiver IC used in safety-critical systems such as airbags, power train, and chassis applications.
- What PSI5 revisions does the L9663 support?
The L9663 supports both PSI5 revisions 1.3 and 2.x.
- What are the data transmission speeds of the L9663?
The L9663 supports data transmission speeds of 83.3 kbps, 125 kbps, and 189 kbps.
- What is the operating voltage of the L9663?
The operating voltage of the L9663 is VB = 4.8 V (5.2 V for sync pulses).
- What are the package options for the L9663?
The L9663 is available in TQFP32 (Exposed pad) and VFQFPN28 packages.
- Does the L9663 have built-in diagnostic features?
Yes, the L9663 includes various diagnostic checks such as OFF and ON diagnostics, and timeslot monitoring (TSM) for frame monitoring.
- How does the L9663 handle power supply configurations?
The L9663 can generate necessary supplies from the VB battery and a supply rail VDD with few external components, offering flexible power supply configurations.
- What is the purpose of the integrated charge pump stage in the L9663?
The integrated charge pump stage is used for pre-regulation with a spread spectrum approach.
- Does the L9663 support SPI interface?
Yes, the L9663 features a 32-bit SPI interface with address multiplexing.
- Is the L9663 tolerant to ground shifts?
Yes, the L9663 is short to ground tolerant with ±1.5 V ground shift.
