LIN Transceivers
Products (2)
L9616-TR - LIN Bus Transceiver | STMicroelectronics | Automotive
The L9616-TR is a LIN (Local Interconnect Network) bus transceiver manufactured by STMicroelectronics, designed for automotive and industrial serial communication networks. It operates as a physical layer interface between the LIN protocol controller and the single-wire bus, supporting data rates up to 20 kbps as per the LIN standard. The device is available in an SO-8 package, making it suitable for space-constrained PCB designs. A LIN transceiver is a specialized integrated circuit that provides the physical layer for LIN networks, which are low-cost, single-wire serial communication buses used primarily in automotive body control applications. The transceiver converts the digital signals from the microcontroller's UART into bus-level voltages and vice versa, while providing protection against bus faults, ESD, and electromagnetic interference. In the system hierarchy, the LIN transceiver sits between the microcontroller (protocol layer) and the physical bus wire, forming the lowest layer of the LIN protocol stack. Key features of the L9616-TR include a wide operating voltage range of 5V to 27V, making it compatible with automotive battery voltages, and a low quiescent current for power-saving in standby modes. The device supports both normal and standby operating modes, with a wake-up capability via the bus line. It also features thermal shutdown and short-circuit protection, ensuring robust operation in harsh automotive environments. The SO-8 package provides a compact footprint with a thermal resistance of approximately 150 C/W, suitable for moderate power dissipation. The L9616-TR is built using STMicroelectronics' high-voltage BCD (Bipolar-CMOS-DMOS) technology, which integrates robust analog and digital circuitry on a single die. This technology enables the transceiver to handle high bus voltages and transient conditions while maintaining low power consumption. The device is fully compliant with the LIN 2.x and SAE J2602 standards, ensuring interoperability with other LIN nodes. Typical applications include automotive body control modules, door modules, seat control, steering column switches, and industrial sensor networks. The L9616-TR is also used in aftermarket automotive electronics and diagnostic tools. Its wide input voltage range and robust protection features make it ideal for direct connection to the vehicle battery. When designing with the L9616-TR, ensure proper bus termination (typically 1kΩ to 10kΩ pull-up to battery) and place a 100nF bypass capacitor close to the VCC pin. The TXD and RXD pins interface directly with the microcontroller's UART, and the INH pin can be used to control an external voltage regulator for power management in sleep mode.
L9969-TR - Automotive LIN Transceiver | STMicroelectronics
The L9969-TR is an automotive-grade LIN (Local Interconnect Network) transceiver from STMicroelectronics, designed for in-vehicle networking applications. It operates as a single-wire transceiver compliant with LIN 2.x and SAE J2602 standards, providing a robust physical layer interface between the LIN protocol controller and the single-wire bus. The device is available in a compact 8-pin SOIC (SO-8) package, making it suitable for space-constrained automotive electronic control units (ECUs). A LIN transceiver is a physical layer device that connects a microcontroller's UART to a single-wire bus, enabling communication at data rates up to 20 kbps. It converts the microcontroller's logic-level signals to the bus voltage levels (typically 12V) and provides protection against short circuits, overvoltage, and ESD. In the automotive network hierarchy, the LIN transceiver sits between the LIN protocol controller (often integrated in the MCU) and the physical bus, forming the lowest-cost networking layer below CAN and FlexRay. It is essential for body control modules, smart actuators, and sensor nodes. Key features of the L9969-TR include a wide operating voltage range of 5.5V to 18V (with 40V load dump protection), a low quiescent current of 10 uA in sleep mode, and a data rate of up to 20 kbps. It supports both 3.3V and 5V microcontroller interfaces, and includes a dominant state timeout and thermal shutdown protection. The device is AEC-Q100 qualified, ensuring reliability in harsh automotive environments. The L9969-TR uses a robust BiCMOS process technology, integrating a high-voltage bus driver, a receiver with slew-rate control, and protection circuitry. Its architecture ensures low electromagnetic emission (EME) and high electromagnetic immunity (EMI), meeting stringent automotive EMC requirements. The device also features a dedicated INH (inhibit) pin for controlling an external voltage regulator, enabling efficient power management in sleep mode. Typical applications include body control modules, door modules, seat control, steering column switches, and smart actuators. The L9969-TR is also used in LIN-based sensor nodes for climate control and lighting systems. Its low quiescent current makes it ideal for battery-powered modules that must remain in sleep mode for extended periods. When designing with the L9969-TR, ensure proper bus termination (typically 1 kOhm to 5V) and place a 220 pF capacitor on the bus line for EMC filtering. The INH pin should be connected to the enable input of the voltage regulator to achieve low standby power consumption. For thermal management, the SO-8 package has a thermal resistance of 150 C/W, so adequate PCB copper area is recommended for high-temperature environments.