TJA1022T,118 NXP Semiconductors, TJA1022T,118 Datasheet - Page 5

• Manufacturer Part Number: TJA1022T,118
• Description: LIN Transceivers DUAL LIN 5-18V
• Manufacturer: NXP Semiconductors

Specifications of TJA1022T,118

• Rohs: yes
• Operating Supply Voltage: 5 V to 18 V
• Supply Current: 10 mA
• Package / Case: SO-14
• Mounting Style: SMD/SMT
• Factory Pack Quantity: 2500

NXP Semiconductors
7. Functional description
TJA1022
Product data sheet
7.2.1 Normal mode
7.1 LIN 2.x/SAE J2602 compliant
7.2 Operating modes
The TJA1022 is the interface between the LIN master/slave protocol controller and the
physical bus in a LIN network. According to the Open System Interconnect (OSI) model,
this is the LIN physical layer.
The LIN transceivers are optimized for, but not limited to, automotive applications with
excellent ElectroMagnetic Compatibility (EMC) performance.
The TJA1022 is fully LIN 2.0, LIN 2.1, LIN 2.2 and SAE J2602 compliant. Since the LIN
physical layer is independent of higher OSI model layers (e.g. the LIN protocol), nodes
containing a LIN 2.2-compliant physical layer can be combined, without restriction, with
LIN physical layer nodes that comply with earlier revisions (i.e. LIN 1.0, LIN 1.1, LIN 1.2,
LIN 1.3, LIN 2.0 and LIN 2.1).
The transceivers are fully operational in Normal mode. A low-power Sleep mode is also
supported, as well as a Reset mode. Standby mode facilitates the transition between
Sleep and Normal modes.
The transceivers operate independently (except in Reset mode), so one transceiver can
be in Normal mode while the other is Sleep or Standby etc. Power consumption is at a
minimum when both transceivers are in Sleep mode.
In Normal mode, the TJA1022 can transmit and receive data via the LIN bus lines. The
transceivers operate independently, so one can be active while the other is off.
A transceiver will switch from Sleep or Standby mode to Normal mode if SLPx_N is held
HIGH for t
Normal to Sleep mode.
The receivers detect data streams on the LIN bus lines (via pins LIN1 and LIN2) and
transfer the input via pins RXD1 and RXD2 to the microcontroller (see
a recessive level and LOW for a dominant level on the bus. The receivers have
supply-voltage related thresholds with hysteresis and integrated filters to suppress bus
line noise.
Transmit data streams from the protocol controller are detected on the TXDx pins and are
converted by the transmitters into optimized bus signals shaped to minimize EME. The
LIN bus output pins are pulled HIGH via internal slave termination resistors. For a master
application, an external resistor in series with a diode should be connected between pin
V
BAT
and the appropriate LINx pin (see
gotonorm
All information provided in this document is subject to legal disclaimers.
. If SLPx_N is held LOW for t
Rev. 1 — 30 March 2012
Figure
gotosleep
6).
Dual LIN 2.2/SAE J2602 transceiver
, the transceiver will switch from
Figure
TJA1022
© NXP B.V. 2012. All rights reserved.
6): HIGH for
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