Overview
The L9662TR is an advanced octal squib driver and quad Manchester/PSI5 encoded sensor interface ASIC designed by STMicroelectronics for safety-critical applications. This device is specifically engineered to deploy up to 8 squibs and interface with up to 4 satellite sensors, making it a robust solution for automotive and industrial safety systems.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | LQFP64 (10x10x1.4 mm) |
| Number of Squib Drivers | 8 |
| Squib Firing Current | 1.2 A (min)/2 ms, 1.75 A (min)/1.0 ms, 1.75 A (min)/0.65 ms |
| Supply Voltage Range (VRES) | 7 V to 37 V |
| Operating Temperature Range | -40°C to +85°C |
| SPI Interface Speed | Up to 5.5 MHz |
| Satellite Sensor Interface | Supports Manchester 1, 2, and PSI5 protocols |
| ESD Protection | 2 kV on all pins |
Key Features
- 8 deployment drivers with SPI selectable firing current and times
- Capability to deploy squibs with various current and time configurations
- Independently controlled high-side and low-side MOS for diagnosis
- Analog output for resistance measurement
- Detection and reporting of squib short to ground and short to battery
- Interface with up to 4 satellite sensors, including Hall sensors on channels 3 and 4
- Programmable independent current trip points for each satellite channel
- Support for Manchester 1, 2, and PSI5 protocols for satellite sensors
- Low voltage internal reset and 2 kV ESD protection on all pins
Applications
The L9662TR is designed for use in safety-critical applications, particularly in the automotive sector. It is suitable for airbag systems, seatbelt pretensioners, and other safety-related deployments. Additionally, it can be used in industrial safety systems where reliable and precise deployment of squibs is necessary.
Q & A
- What is the primary function of the L9662TR?
The primary function of the L9662TR is to deploy up to 8 squibs and interface with up to 4 satellite sensors for safety-critical applications. - What are the different firing current configurations of the L9662TR?
The L9662TR can deploy squibs with firing currents of 1.2 A (min)/2 ms, 1.75 A (min)/1.0 ms, and 1.75 A (min)/0.65 ms. - What is the operating temperature range of the L9662TR?
The operating temperature range of the L9662TR is -40°C to +85°C. - What protocols does the L9662TR support for satellite sensors?
The L9662TR supports Manchester 1, 2, and PSI5 protocols for satellite sensors. - Does the L9662TR have ESD protection?
Yes, the L9662TR has 2 kV ESD protection on all pins. - What type of package does the L9662TR come in?
The L9662TR comes in an LQFP64 (10x10x1.4 mm) package. - Can the L9662TR interface with Hall sensors?
Yes, the L9662TR can interface with Hall sensors on channels 3 and 4. - What is the maximum speed of the SPI interface on the L9662TR?
The maximum speed of the SPI interface on the L9662TR is up to 5.5 MHz. - Does the L9662TR have diagnostic capabilities?
Yes, the L9662TR has full diagnostic capabilities, including detection and reporting of squib short to ground and short to battery. - What is the supply voltage range for the L9662TR?
The supply voltage range for the L9662TR is 7 V to 37 V.
