1. General description
The TJA1022 is a dual LIN transceiver that provides the interface between a Local
Interconnect Network (LIN) master/slave protocol controller and the physical bus in a LIN
network. It is primarily intended for in-vehicle subnetworks using baud rates up to 20 kBd
and is compliant with LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, ISO 17987-4:2016 (12 V LIN)
and SAE J2602. The TJA1022T and TJA1022TK (SO14/HVSON14 packages) are pin
compatible with the TJA1020, TJA1021, TJA1027 and TJA1029; the TJA1022HG
(DHVQFN24 package) is pin compatible with the TJA1024 (see Section 18
). The
TJA1022, TJA1024, TJA1027 and TJA1029 are software compatible.
The transmit data streams generated by the protocol controller are converted by the
TJA1022 into optimized bus signals shaped to minimize ElectroMagnetic Emissions
(EME). The LIN bus output pins are pulled HIGH via internal termination resistors. For a
master application, an external resistor in series with a diode should be connected
between pin V
BAT
and each of the LIN pins. The receivers detect receive data streams on
the 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, the
TJA1022 can still be woken up via pins LIN1/LIN2 and SLP1_N/SLP2_N.
2. Features and benefits
2.1 General
Two LIN transceivers in a single package
LIN 2.0, LIN 2.1, LIN 2.2, LIN 2.2A, ISO 17987-4:2016 (12 V LIN) 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, HVSON14 and DHVQFN24 packages
Leadless HVSON14 (3.0 mm 4.5 mm) and DHVQFN24 (3.5 mm 5.5 mm)
packages with improved Automated Optical Inspection (AOI) capability
TJA1022
Dual LIN 2.2A/SAE J2602 transceiver
Rev. 3 — 24 May 2018 Product data sheet
