LIN Transceiver Exceeds 6kV ESD Performance
The TJA1021 interfaces between a Local
Interconnect Network (LIN) master/slave
protocol controller and a physical bus in
automotive sub-networks with baud rates
from 1kBd up to 20kBd.
NXP’s TJA1021 features improved ESD
performance of more than 6kV, meeting IEC
61000-4-2, or Zwickau model, and is LIN 2.0/SAE
J2602 compliant. Furthermore, the TJA1021 is
manufactured using NXP’s ABCD3 process to
outperform automotive AEC Q100 requirements.
The transmit data stream of the protocol
controller at the transmit data input (TXD) is
converted by the TJA1021 into a bus signal with
optimised slew rate and wave shaping to
minimise ElectroMagnetic Emission (EME). Besides
the normal-slope version, a low-slope version for
bit rates of up to 10.4kBaud is available, allowing
manufacturers to build electronic control units
without external ESD protection. As a result, overall
system cost is significantly reduced while still
meeting ESD requirements.
To reduce power consumption, the transceiver
sleep current has been reduced to 6µA. For even
further power reduction, there is no bus leakage
current if the transceiver is not supplied, such as
when partial network operation is fully supported.
The TJA1021 comes in an industry-standard SO8
package and is pin compatible with its
predecessor, the TJA1020.
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