データシートサーチシステム |
|
TCAN1044-Q1 データシート(PDF) 27 Page - Texas Instruments |
|
TCAN1044-Q1 データシート(HTML) 27 Page - Texas Instruments |
27 / 40 page 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 |
|
同様の説明 - TCAN1044-Q1_V02 |
|
|
リンク URL |
プライバシーポリシー |
ALLDATASHEET.JP |
ALLDATASHEETはお客様のビジネスに役立ちますか? [ DONATE ] |
Alldatasheetは | 広告 | お問い合わせ | プライバシーポリシー | リンク交換 | メーカーリスト All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |