General description
The TJA1028 is a LIN 2.0/2.1/SAE J2602 and ISO 17987-4:2016 (12 V) compliant transceiver with an integrated low-drop voltage regulator. The voltage regulator can deliver up to 70 mA and is available in 3.3 V and 5.0 V variants. TJA1028 facilitates the development of compact nodes in Local Interconnect Network (LIN) bus systems. To support robust designs, the TJA1028 offers strong ElectroStatic Discharge (ESD) performance and can withstand high voltages on the LIN bus. In order to minimize current consumption, the TJA1028 supports a Sleep mode in which the LIN transceiver and the voltage regulator are powered down while still having wake-up capability via the LIN bus.
The TJA1028 comes in an SO8 package, and also in a 3 mm × 3 mm HVSON8 package that reduces the required board space by over 70 %. This feature can prove extremely valuable when board space is limited.

Features and benefits
• LIN 2.0/2.1/2.2 compliant
• SAE J2602 compliant
• ISO 17987-4:2016 (12 V) compliant (TJA1028A/B/C/D)
• Downward compatible with LIN 1.3
• Internal LIN responder termination resistor
• Voltage regulator offering 5 V or 3.3 V, 70 mA capability
• 2 % voltage regulator accuracy over specified temperature and supply ranges
• Voltage regulator output undervoltage detection with reset output
• Voltage regulator is short-circuit proof to ground
• Voltage regulator stable with ceramic, tantalum and aluminum electrolyte capacitors
• Robust ESD performance; ±8 kV according to IEC61000-4-2 for pins LIN and VBAT
• Pins LIN and VBAT protected against transients in the automotive environment (ISO 7637)
• Very low LIN bus leakage current of < 2 μA when battery not connected
• LIN pin short-circuit proof to battery and ground
• Transmit data (TXD) dominant time-out function
• Thermally protected
• Very low ElectroMagnetic Emission (EME)
• High ElectroMagnetic Immunity (EMI)
• Typical Standby mode current of 45 μA
• Typical Sleep mode current of 12 μA
• LIN bus wake-up function
• K-line compatible
• Available in SO8 and HVSON8 packages
• Leadless HVSON8 package (3.0 mm × 3.0 mm) with improved Automated Optical Inspection (AOI) capability
• Dark green product (halogen free and Restriction of Hazardous Substances (RoHS) compliant)