描述 Description

The TJA1022 is a dual LIN transceiver that provides the interface between a LocalInterconnect Network (LIN) master/slave protocol controller and the physical bus in a LINnetwork. It is primarily intended for in-vehicle subnetworks using baud rates up to 20?kBdand is compliant with LIN?2.0, LIN?2.1, LIN?2.2, LIN?2.2A and SAE?J2602. The TJA1022 ispin compatible with the TJA1020, TJA1021 and TJA1027. The TJA1022and TJA1027 are also software compatible.
The transmit data streams generated by the protocol controller are converted by theTJA1022 into optimized bus signals shaped to minimize ElectroMagnetic Emissions(EME). The LIN bus output pins are pulled HIGH via internal termination resistors. For amaster application, an external resistor in series with a diode should be connectedbetween pin VBAT and each of the LIN pins. The receivers detect receive data streams onthe LIN bus input pins and transfer them via pins RXD1 and RXD2 to the microcontroller.
Power consumption is very low when both transceivers are in Sleep mode. However, theTJA1022 can still be woken up via pins LIN1/LIN2 and SLP1_N/SLP2_N.

特性 Features

General
? Two LIN transceivers in a single package
? LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A and SAE J2602 compliant
? Baud rate up to 20 kBd
? Very low ElectroMagnetic Emissions (EME)
? Very low current consumption in Sleep mode with remote LIN wake-up
? Input levels compatible with 3.3 V and 5 V devices
? Integrated termination resistors for LIN slave applications
? Passive behavior in unpowered state
? Operational during cranking pulse: full operation from 5 V upwards
? Undervoltage detection
? K-line compatible
? Available in SO14 and HVSON14 packages
? Leadless HVSON14 package (3.0 mm × 4.5 mm) with improved Automated Optical Inspection (AOI) capability
? Dark green product (halogen free and Restriction of Hazardous Substances (RoHS) compliant)
? Pin-compatible with the TJA1020, TJA1021 and TJA1027
? Software-compatible with the TJA1027
Protection
? Very high ElectroMagnetic Immunity (EMI)
? Very high ESD robustness: ±8 kV according to IEC 61000-4-2 for pins LIN1, LIN2 and VBAT
? Bus terminal and battery pin protected against transients in the automotive environment (ISO 7637)
? Bus terminal short-circuit proof to battery and ground
? Thermally protected
? Initial TXD dominant check when switching to Normal mode
? TXD dominant time-out function