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参数资料
| 型号： | TSB17BA1 |
| 厂商： | Texas Instruments, Inc. |
| 英文描述： | IEEE STD 1394b SINGLE-PORT CABLE TRANSCEIVER |
| 中文描述： | IEEE标准的1394b单端口电缆收发器 |
| 文件页数： | 9/15页 |
| 文件大小： | 218K |
| 代理商： | TSB17BA1 |
SLLS568C JANUARY 2004 REVISED MARCH 2004
9
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
1394 Link
1394b PHY
Termination
and
Transformer
RJ45
UTP Cable
Termination
TSB17BA1
Figure 3. 1394b Cable Termination
signal coding
The signaling generated from a 1394b PHY is 8B/10B encoded. This means to send 8 bits of data requires the
transmission of 10 bits across the cable. The maximum frequency that is required to send 100 Mbits/s is a
fundamental frequency of 62.5 MHz (see the IEEE Std 1394b-2002 for more explanation).
connector pins
The current IEEE Std 1394b-2002 requires that the connection from 1394b PHY signal to the RJ45 connector
pin be:
TPB+ to RJ45 pin 1
TPB to RJ45 pin 2
TPA+ to RJ45 pin 7
TPA to RJ45 pin 8
There is a proposal to change the IEEE Std 1394b-2002 connection from 1394b PHY signal to the RJ45
connector pin to be the same as the 100baseT Ethernet. This allows use of more 100baseT Ethernet
components for 1394b connections. This changes the connections to:
TPB+ to RJ45 pin 1
TPB to RJ45 pin 2
TPA+ to RJ45 pin 3
TPA to RJ45 pin 6
It is anticipated that the change will be implemented into IEEE Std 1394b-2002, though it has not been ratified.
Therefore, it is recommended that all implementations utilize the new pinout running TPA+ to pin 3 and TPA
to pin 6. If a closed system is created, meaning the designer controls the electronics at both ends of the UTP5
cable, then using pins 7 and 8 can give as much as a 12-dB reduction in crosstalk rather than using pins 3 and
6. Please contact Texas Instruments for further details.
cable connection
The IEEE Std 1394b-2002 requires the output of a TPB port to be connected to the input of a TPA port when
connecting one device to a second device. In other words, it requires a crossover somewhere between the two
PHY ports. The 1394b standard further states that a UTP5 device incorporates logic that can automatically
implement this crossover in the logic. The TSB17BA1 does not contain this logic, therefore, the crossover must
be implemented external to the TSB17BA1.
It is recommended for users of the TSB17BA1 to:
Design the UTP5 connection to pins 1, 2 and 3, 6 as previously detailed.
Ship an Ethernet crossover cable with their devices.
The crossover cable connects:
Pin 1 on the near end of the cable to pin 3 on the far end of the cable
Pin 2 on the near end of the cable to pin 6 on the far end of the cable
Pin 3 on the near end of the cable to pin 1 on the far end of the cable
Pin 6 on the near end of the cable to pin 2 on the far end of the cable, thereby implementing the crossover.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| TSB17BA1PW | 功能描述:1394 接口集成电路 UTP5 Equalizer for 1394b PHYs RoHS:否 制造商:Texas Instruments 类型:Link Layer Controller 工作电源电压: 封装 / 箱体:LQFP 封装:Tray |
| TSB17BA1PWG4 | 功能描述:1394 接口集成电路 UTP5 Equalizer for 1394b PHYs RoHS:否 制造商:Texas Instruments 类型:Link Layer Controller 工作电源电压: 封装 / 箱体:LQFP 封装:Tray |
| TSB18 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EURO TERMINAL BLOCKS |
| TSB1857CT A3 | 功能描述:两极晶体管 - BJT PNP Transistor Low Vce sat RoHS:否 制造商:STMicroelectronics 配置: 晶体管极性:PNP 集电极—基极电压 VCBO: 集电极—发射极最大电压 VCEO:- 40 V 发射极 - 基极电压 VEBO:- 6 V 集电极—射极饱和电压: 最大直流电集电极电流: 增益带宽产品fT: 直流集电极/Base Gain hfe Min:100 A 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PowerFLAT 2 x 2 |
| TSB19 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:EURO TERMINAL BLOCKS |
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