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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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PEF22504HT bảng dữ liệu(PDF) 87 Page - Infineon Technologies AG |
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PEF22504HT bảng dữ liệu(HTML) 87 Page - Infineon Technologies AG |
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87 / 255 page  Data Sheet 87 Rev. 1.3, 2006-01-25 QuadLIU TM PEF 22504 Functional Description Figure 26 Monitoring Application using RLM (shown for one line) The required resistor and transformer values are given in Table 16. 3.7.3.4 Redundancy Application using RLM In general for redundancy applications (“protection switching”) one channel is active while the other is in stand-by mode. Switching between active and stand-by mode can be done by software and by hardware. Software controlled switching can be done on the line side in transmit direction by using the register bit XPM2.XLT. Combined hardware and software controlled switching can be done on the line side in transmit direction by a hardware signal if a Multi Function Port is configured as tristate input XLT. It is proposed that the Multi Function Port XPA be used for XLT or XLT input respectively, if this is the case then the PC1.XPC1(3:0) register bits must be programed, see Table 34. For one channel the Multi Function Port XPA must be programmed as low active (PC1.XPC1 = ´1110 b´) and for the other channel as high active (PC1.XPC1 = ´1000b´), so that no external inverter Table 16 External Component Recommendations for Monitoring Applications using RLM Parameters of external components 1) 1) This includes all parasitic effects caused by circuit board design. Line Impedance Z 0 Line Impedance Z 0 E1 T1 J1 75 Ohm 120 Ohm 100 Ohm 110 Ohm R E (±1 %) 75 Ω 120 Ω 100 Ω 110 Ω R 3 (±1 %) 330 Ω 510 Ω 430 Ω 470 Ω R SER See Chapter 3.9.1 t 2 : t1 1 :1 1 :1 1 : 1 1 : 1 E1/T1/J1 Receive Line RL1 RL2 RDO RL1 RL2 RDO XL1 XL2 E1/T1/J1 Transmit Line XDI XL1 XL2 XDI receiver channel RSIG RSIG QFALC_monitor_RLM R E R E R 3 R SER R SER R SER R SER monitor channel |
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