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TCAN1044-Q1 データシート(PDF) 27 Page - Texas Instruments

部品番号 TCAN1044-Q1
部品情報  TCAN1044-Q1 Automotive Fault-Protected CAN FD Transceiver
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メーカー  TI1 [Texas Instruments]
ホームページ  http://www.ti.com
Logo TI1 - Texas Instruments

TCAN1044-Q1 データシート(HTML) 27 Page - Texas Instruments

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GND
U1
U1
TCAN1044(V)
R3
R2
RXD
VCC
TXD
C3
GND
STB
GND
GND
R7
R6
GND
VIO
VCC or VIO
R1
27
TCAN1044-Q1, TCAN1044V-Q1
www.ti.com
SLLSF17A – AUGUST 2019 – REVISED DECEMBER 2019
Product Folder Links: TCAN1044-Q1 TCAN1044V-Q1
Submit Documentation Feedback
Copyright © 2019, Texas Instruments Incorporated
11 Layout
Robust and reliable CAN node design may require special layout techniques depending on the application and
automotive design requirements. Since transient disturbances have high frequency content and a wide
bandwidth, high-frequency layout techniques should be applied during PCB design.
11.1 Layout Guidelines
Place the protection and filtering circuitry close to the bus connector, J1, to prevent transients, ESD, and
noise from propagating onto the board. This layout example shows a optional transient voltage suppression
(TVS) diode, D1, which may be implemented if the system-level requirements exceed the specified rating of
the transceiver. This example also shows optional bus filter capacitors C4 and C5.
Design the bus protection components in the direction of the signal path. Do not force the transient current to
divert from the signal path to reach the protection device.
Use VCC and GND planes to provide low inductance. Note that high frequency current follows the path of
least impedance and not the path of least resistance.
Decoupling capacitors should be placed as close as possible to the supply pins VCC and VIO of transceiver.
Use at least two vias for VCC and ground connections of decoupling capacitors and protection devices to
minimize trace and via inductance.
This layout example shows how split termination could be implemented on the CAN node. The termination is
split into two resistors, R6 and R7, with the center or split tap of the termination connected to ground via
capacitor C3. Split termination provides common mode filtering for the bus. See CAN Termination, CAN Bus
Short Circuit Current Limiting, and Equation 2 for information on termination concepts and power ratings
needed for the termination resistor(s).
To limit current of digital lines series resistors may be used. Examples are R2, R3 and R4.
Pin 1 is shown for the TXD input of the device with R1 as an optional pull-up resistor. If an open drain host
controller is used this is mandatory to ensure the bit timing into the device is met.
Pin 8 is shown with R4 assuming the mode pin STB, is used. If the device is used in normal mode only, R4 is
not needed and the pads of C4 could be used for the pull down resistor R5 to GND.
11.2 Layout Example
Figure 23. Layout Example


同様の部品番号 - TCAN1044-Q1_V02

メーカー部品番号データシート部品情報
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同様の説明 - TCAN1044-Q1_V02

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logo
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