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參數(shù)資料
| 型號(hào)： | TMC2005 |
| 廠商： | STANDARD MICROSYSTEMS CORP |
| 元件分類： | 網(wǎng)絡(luò)接口 |
| 英文描述： | 5 Port HUB Controller Device |
| 中文描述： | DATACOM, NETWORK INTERFACE SUPPORT CIRCUIT, PQFP60 |
| 封裝： | QFP-60 |
| 文件頁(yè)數(shù)： | 24/32頁(yè) |
| 文件大?。?/td> | 153K |
| 代理商： | TMC2005 |
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SMSC DS – TMC2005
Page 24
Rev. 10/24/2000
CASCADING CONNECTION
HUBs can be connected in cascade by using the ports as Fig. 12. In the case of cascade connection, it is
necessary to consider how many HUBs can exist in serial. The maximum delay between input port and output port
is 650ns @2.5Mbps at the TMC2005. It is equivalent to the propagation delay when a cable length is 135m. For
example, if every cable length is 10m in Figure 12, the longest distance is physically 50m but it is electrically 590m
because of multiplying 10m by 5 and 135m by 4, and the total propagation delay becomes 2.8uS. For analyzing the
network timing, consider the delay caused by HUBs. In the ARCNET protocol, it is defined that the longest
distance between nodes is the maximum 6.4Km. For example, if 20 TMC2005s exist between nodes in the longest
distance, the actual cable length is 3.7Km because of deducting 135m by 20 in converting to cable length from
6.4Km.
FIGURE 12 - CASCADE CONNECTION OF 4 HUBS
Two examples of eight ports HUBs using two TMC2005s are shown in Fig. 13 and 14. If connecting as in Fig. 13,
eight TMC2005s exist between the nodes at both far ends. On the other hand, when assigning two ports for
cascading connection to the same TMC2005, the number of TMC2005 in serial connection can be down to the
number of HUBs plus two, which can reduce the propagation delay.
TMC2005
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMC2005-JT | 功能描述:接口 - 專用 5 Port Hub Contrllr RoHS:否 制造商:Texas Instruments 產(chǎn)品類型:1080p60 Image Sensor Receiver 工作電源電壓:1.8 V 電源電流:89 mA 最大功率耗散: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:BGA-59 |
| TMC20073 | 制造商:SMSC 制造商全稱:SMSC 功能描述:CIRCLINK COMMUNICATIONS CONTROLLER LSI |
| TMC-20073 | 制造商:Microchip Technology Inc 功能描述:ARCNET CONTROLLER |
| TMC20073-NT | 制造商:SMSC 制造商全稱:SMSC 功能描述:CIRCLINK COMMUNICATIONS CONTROLLER LSI |
| TMC200A | 制造商:TOPSTEK 制造商全稱:TOPSTEK 功能描述:Topstek Current Transducer |
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