SN65HVDA100QDRQ1

The SN65HVDA100 device is a Local Interconnect Network (LIN) physical interface that integrates a serial transceiver with wake-up and protection features. The LIN bus is a single-wire bidirectional bus commonly used in low-speed in-vehicle networks, operating at data rates ranging from 2.4kbps to 20kbps. The SN65HVDA100 converts the LIN protocol data stream on TXD to LIN bus signals through a current-limiting waveshaping driver as outlined in the LIN physical layer specification. The receiver converts the data stream from the LIN bus and outputs it via RXD. The LIN bus has two states: dominant (voltage near ground) and recessive (voltage near battery). In the recessive state, the LIN bus is pulled high through an internal pull-up resistor (30kΩ) and a series diode, eliminating the need for external pull-up components in slave applications. Master applications require an external pull-up resistor (1kΩ) plus a series diode (per LIN specification). In sleep mode, the quiescent current remains very low even with the wake-up circuit active; remote wake-up via the LIN bus and local wake-up via the NWake or EN pin are both supported. The SN65HVDA100 is designed for harsh automotive environments. In the event of a ground shift or supply voltage disconnection, the device prevents feedback current from flowing through LIN to the supply input. In addition, the device provides undervoltage, overtemperature, and ground loss protection. When a fault condition occurs, the transmitter shuts down immediately and remains off until the fault condition is resolved.

Applications

• Automotive
• Industrial sensing
• White goods distributed control

Key features

• Automotive electronics applications, compliant with LIN physical layer specification revision 2.1 and SAEJ2602 recommended practices for LIN
• Extended operating supply voltage 5V to 27V DC (LIN specification 7V to 18V)
• LIN transmission speed up to 20kbps (specified maximum), with high-speed reception support
• Sleep mode: ultra-low current consumption, supporting wake-up events for LIN bus, wake-up input (external switch), or host MCU
• Wake-up request on RXD pin
• Wake-up source identification on TXD pin
• Interface to MCU via 5V or 3.3V I/O pins
• High EMC performance
• External voltage regulator control (INH pin)
• ISO9141 (K-line) compatible functionality
• LIN pin ±12kV (HBM) ESD protection
• LIN pin voltage handling from -27V to 45V (battery short or ground)
• Transient damage protection in automotive environments (ISO7637)
• Undervoltage protection on VSUP
• TXD dominant state timeout protection
• Prevention of false wake-up during sustained bus dominant fault
• Thermal shutdown
• System-level fail-safe protection for unpowered nodes or disconnected ground — unpowered nodes do not disturb the bus (no load on bus)