參數(shù)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(shù)： 29/31頁
文件大?。?/td> 254K
代理商： TJA1050
TJA1050 - CAN High-Speed Transceiver
Application Note
AN00020
Philips Semiconductors
29
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The topology describes the wiring harness structure. Typical structures are linear, star- or multistar-like. In
automotive, shielded or unshielded twisted pair cable usually functions as a transmission line.
Transmission lines are generally characterized by the length-related resistance R
, the specific line delay
t
and the characteristic line impedance Z. Table 9.3 shows the physical media parameters specified in
the ISO11898 and SAE J2284 standard [7]. Notice that SAE J2284 specifies the twist rate in addition.
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Table 9.3 Physical media parameters of a pair of wires (shielded or unshielded)
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Transmission lines must be terminated with the characteristic line impedance, otherwise signal reflections
will occur on the bus causing significant ringing. The topology has to be chosen such that reflections will
be minimized. Often the topology is a trade-off between reflections and wiring constraints.
CAN is well prepared to deal with reflection ringing due to some useful protocol implementations:
1. Only recessive to dominant transitions are used for resynchronization.
2. Resynchronization is allowed only once between two sample points, and only if a recessive bit was
sampled.
3. The sample point is programmable to be close to the end of the bit time.
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Generally the CAN high-speed standard ISO11898 defines a single line structure as network topology.
The bus line is terminated at both ends with a single termination resistor. The nodes are connected via
unterminated drop cables or stubs to the bus. In order to keep the ringing duration short compared to the
bit time, the stub length should be as short as possible. For example the ISO11898 standard limits the stub
length to 0,3m. The corresponding SAE standard, J2284, recommends keeping the stub length below 1m.
To minimize standing waves, ECUs should not be placed equally spaced on the network and cable tail
lengths should not all be the same length [7]. Table 9.4 along with Figure 9.2 illustrates the topology
requirements of the SAE J2284 standard.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)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(wǎng)絡控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)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(wǎng)絡控制器與處理器 IC CAN 1MBd Silent 5V 8-Pin RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)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(wǎng)絡控制器與處理器 IC HIGH SPEED CAN TRANSCEIVER RoHS:否 制造商:Micrel 產(chǎn)品:Controller Area Network (CAN) 收發(fā)器數(shù)量: 數(shù)據(jù)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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