Overview
The L9663-TR-1, produced by STMicroelectronics, is a 2-channel Peripheral Sensor Interface (PSI5) transceiver IC designed specifically for automotive sensor applications. PSI5 is an open standard that builds on existing sensor interfaces, offering a universal and flexible solution for multiple sensor applications. This device supports both asynchronous and synchronous operations and various bus modes, making it compatible with PSI5 revisions 1.3 and 2.1. It connects sensors to the Electronic Control Unit (ECU) using the same line for power supply and data transmission, providing a pre-regulated voltage to the sensors and reading the transmitted sensor data.
Key Specifications
| Parameter | Description |
|---|---|
| Operating Voltage | VB = 4.8 V to 35 V (5.2 V for sync pulses with 3.5 V step) |
| Ambient Temperature Range | -40°C to 140 °C |
| Data Transmission Speed | 125 kbps (optional 83.3 kbps and 189 kbps) |
| Package | VFQFPN28 or TQFP32EP |
| Interface Compatibility | Compatible with PSI5 revisions 1.3 and 2.1 |
| EMC Robustness | High EMC robustness and low emission |
| SPI Interface | 32-bit SPI interface with address multiplexing |
Key Features
- 2-channel PSI5 transceiver
- Manchester coded digital data transmission
- High data transmission speed of 125 kbps (optional 83.3 kbps and 189 kbps)
- High EMC robustness and low emission
- Bootstrap circuits for sync pulses
- Current limitation and voltage clamp on interface pins
- Integrated charge pump stage for pre-regulation with spread spectrum approach
- Integrated FLL module for high accuracy timing control
- Reverse voltage protection structure
- Short to ground tolerant with ±1.5 V ground shift
Applications
The L9663-TR-1 is primarily used in automotive sensor applications, including but not limited to:
- Peripheral sensor interfaces in vehicles
- ECU (Electronic Control Unit) sensor connections
- Automotive safety and control systems
- Sensor networks in vehicles requiring high data transmission speeds and robust EMC performance
Q & A
- What is the primary function of the L9663-TR-1?
The L9663-TR-1 is a 2-channel PSI5 transceiver IC designed for automotive sensor applications, providing power supply and data transmission over the same line.
- What are the compatible PSI5 revisions for the L9663-TR-1?
The device is compatible with PSI5 revisions 1.3 and 2.1.
- What is the operating voltage range of the L9663-TR-1?
The operating voltage range is from 4.8 V to 35 V, with 5.2 V for sync pulses with a 3.5 V step.
- What is the ambient temperature range for the L9663-TR-1?
The ambient temperature range is from -40°C to 140 °C.
- What data transmission speeds are supported by the L9663-TR-1?
The device supports data transmission speeds of 125 kbps, with optional speeds of 83.3 kbps and 189 kbps.
- What types of packages are available for the L9663-TR-1?
The device is available in VFQFPN28 and TQFP32EP packages.
- Does the L9663-TR-1 have any EMC protection features?
Yes, it has high EMC robustness and low emission features.
- What type of SPI interface does the L9663-TR-1 use?
The device uses a 32-bit SPI interface with address multiplexing.
- Is the L9663-TR-1 tolerant to short circuits?
Yes, it is short to ground tolerant with ±1.5 V ground shift.
- What is the purpose of the integrated charge pump stage in the L9663-TR-1?
The integrated charge pump stage is used for pre-regulation with a spread spectrum approach.
