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參數資料
| 型號： | TJA1050 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | CAN High-Speed Transceiver(CAN高速收發(fā)器) |
| 中文描述： | CAN高速收發(fā)器（的CAN高速收發(fā)器） |
| 文件頁數： | 24/31頁 |
| 文件大?。?/td> | 254K |
| 代理商： | TJA1050 |
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TJA1050 - CAN High-Speed Transceiver
Application Note
AN00020
Philips Semiconductors
24
Normally, transceivers are pulling RxD to GND if unpowered, thus clamping RxD to dominant level.
This will be recognised by the CAN-controller as a continuous wake-up signal. So it is not possible to put
the CAN-controller into its standby mode when the transceiver is unpowered.
The TJA1050 overcomes this RxD dominant clamping by making the RxD-pin floating in unpowered
case. Now an integrated RxD pull-up resistor in the CAN-controller is sufficient to pull RxD recessive. It
is also possible to add an external pull-up resistor if desired.
$CEMYCTF5WRRN[VQYCTFU8
Reverse currents flowing into unpowered transceivers generally provide an unwanted backward supply
towards V
. This might cause some unwanted behaviour. Considering a situation where the transceiver is
unpowered while the microcontroller/CAN-controller remains powered, there are mainly four reverse
current paths possible.
-
Reverse currents from a High level at RxD to V
CC
-
Reverse currents from a High level at TxD to V
CC
-
Reverse currents from a High level at pin "S" to V
CC
-
Reverse currents from the bus lines to V
CC
and GND
The first three paths have been eliminated completely with the TJA1050. Reverse currents from the bus
lines have been reduced significantly. As a result the possible backward supply voltage at V
lies
significantly below that of the PCA82C250. It is expected that the remaining backward supply voltage is
not capable of initiating some undefined behaviour of devices supplied by the same V
CC
.
%%
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相關代理商/技術參數 |
參數描述 |
|---|---|
| TJA1050T | 制造商:NXP Semiconductors 功能描述: 制造商:NXP Semiconductors 功能描述:LAN Transceiver, Single, 8 Pin, Plastic, SOP |
| TJA1050T/CM,118 | 功能描述:CAN 接口集成電路 RoHS:否 制造商:Texas Instruments 類型:Transceivers 工作電源電壓:5 V 電源電流: 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:SOIC-8 封裝:Tube |
| TJA1050T/H/V,112 | 功能描述:網絡控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| TJA1050T/H/V,118 | 功能描述:網絡控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
| TJA1050T/N,112 | 功能描述:網絡控制器與處理器 IC HIGH SPEED CAN TRANSCEIVER RoHS:否 制造商:Micrel 產品:Controller Area Network (CAN) 收發(fā)器數量: 數據速率: 電源電流（最大值）:595 mA 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:PBGA-400 封裝:Tray |
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