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数据搜索系统，热门电子元器件搜索 |
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DS31256 数据表(PDF) 182 Page - Maxim Integrated Products |
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DS31256 数据表(HTML) 182 Page - Maxim Integrated Products |
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182 / 183 page  DS31256 256-Channel, High-Throughput HDLC Controller 182 of 183 17.3 Single T3 with 512 HDLC Channel Support Figure 17-6 shows an application where a T3 line is interfaced to two DS31256s. The T3 line is demultiplexed by the M13 block and passed to the DS21FF42 and DS21FT42 devices. The T1 framers locate the frame and multiframe boundaries and interface to the DS31256. Aggregating four T1 lines into a single 8.192MHz data stream is not required since the DS31256 has enough physical ports to support the application, but aggregation could be done to cut down on the number of electrical connections between the DS31256 and the T1 framers. The T1 lines can be either clear channel or channelized. Figure 17-6. T3 Application (512 HDLC Channels) DS31256 #1 DS21FF42 4 x 4 16-Channel T1 Framer DS21FT42 4 x 3 12-Channel T1 Framer DS3112 M13 Interface 1 2 16 Port 0 Port 1 Port 2 Port 3 17 18 28 Port 4 Port 5 Port 6 Port 7 Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 Port 0 Port 1 Port 2 Port 3 Port 4 Port 5 Port 6 Port 7 Port 8 Port 9 Port 10 Port 11 Port 12 Port 13 Port 14 Port 15 DS31256 #2 |
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