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TJR1441 Datasheet(PDF) 12 Page - NXP Semiconductors

Part # TJR1441
Description  High-speed CAN transceiver
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

TJR1441 Datasheet(HTML) 12 Page - NXP Semiconductors

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NXP Semiconductors
TJR1441
High-speed CAN transceiver
TJR1441
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2020. All rights reserved.
Product data sheet
Rev. 1 — 7 September 2020
12 / 31
are active on these pins in all states; they should be held at the VCC/VIO level in Silent (or
Off in TJR1441D) mode to minimize supply current.
7.2.3 Undervoltage detection on pins VCC and VIO
If VCC or VIO drops below the undervoltage detection threshold (Vuvd(VCC) or Vuvd(swoff)VCC
for VCC; Vuvd(swoff)VIO for VIO) the transceiver switches to Off mode and disengages from
the bus (zero load; bus pins high-ohmic) until the supply voltage has recovered. If Normal
mode is selected, the output drivers are enabled once both VCC and VIO are again within
their operating ranges and TXD has been reset to HIGH.
7.2.4 Overtemperature protection
The device is protected against overtemperature conditions. If the junction temperature
exceeds the shutdown junction temperature, Tj(sd), the CAN bus drivers are disabled.
When the junction temperature drops below Tj(sd)rel, the CAN bus drivers recover once
TXD has been reset to HIGH and Normal mode is selected (waiting for TXD to go HIGH
prevents output driver oscillation due to small variations in temperature).
7.2.5 I/O levels
Pin VIO of the TJR1441A should be connected to the microcontroller supply voltage (see
Figure 11). This adjusts the signal levels on pins TXD, RXD and S to the I/O levels of the
microcontroller, allowing for direct interfacing without additional glue logic.
All I/O levels are related to VCC in the TJR1441B/D and are, therefore, compatible with
5 V microcontrollers. Spurious signals from the microcontroller on pins S, S_N and OFF
are filtered out with a filter time of tfltr(IO).


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