TCAN1051H Datasheet, PDF (24/35 Pages) Texas Instruments – Fault Protected CAN Transceiver with CAN FD

TCAN1051H, TCAN1051HV
TCAN1051HG, TCAN1051HGV
SLLSES8B – MARCH 2016 – REVISED MAY 2016
www.ti.com
11 Power Supply Requirements
These devices are designed to operate from a V_CC input supply voltage range between 4.5 V and 5.5 V. Some
devices have an output level shifting supply input, V_IO, designed for a range between 3.0 V and 5.5 V. Both
supply inputs must be well regulated. A bulk capacitance, typically 4.7 μF, should be placed near the CAN
transceiver's main V_CC supply output, and in addition a bypass capacitor, typically 0.1 μF, should be placed as
close to the device's V_CC and V_IO supply terminals. This helps to reduce supply voltaeg ripple present on the
outputs of the switched-mode power supplies and also helps to compensate for the resistance and inductance of
the PCB power planes and traces.
12 Layout
Robust and reliable bus node design often requires the use of external transient protection device in order to
protect against EFT and surge transients that may occur in industrial enviroments. Because ESD and transients
have a wide frequency bandwidth from approximately 3 MHz to 3 GHz, high-frequency layout techniques must
be applied during PCB design. The TCAN1051 family comes with high on-chip IEC ESD protection, but if higher
levels of system level immunity are desired external TVS diodes can be used. TVS diodes and bus filtering
capacitors should be placed as close to the on-board connectors as possible to prevent noisy transient events
from propagating further into the PCB and system.
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