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CS61577-IL1 Datasheet(PDF) 28 Page - List of Unclassifed Manufacturers |
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CS61577-IL1 Datasheet(HTML) 28 Page - List of Unclassifed Manufacturers |
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28 / 44 page  Transformers Recommended transmitter and receiver trans- former specifications are shown in Table A2. The transformers in Table A3 have been tested and recommended for use with the CS61577. Refer to the "Telecom Transformer Selection Guide" for detailed schematics which show how to connect the line interface IC with a particular transformer. Selecting an Oscillator Crystal Specific crystal parameters are required for proper operation of the jitter attenuator. It is rec- ommended that the Crystal Semiconductor CXT6176 crystal be used for T1 applications and the CXT8192 crystal be used for E1 applications. Transmit Side Jitter Attenuation In some applications it is desirable to attenuate jitter from the signal to be transmitted. A CS61577 in local loopback mode can be used as a jitter attenuator. The inputs to the jitter attenuator are TPOS, TNEG, TCLK. The outputs from the jitter attenuator are RPOS, RNEG and RCLK. Line Protection Secondary protection components can be added to provide lightning surge and AC power-cross immunity. Refer to the "Telecom Line Protection Application Note" for detailed information on the different electrical safety standards and specific application circuit recommendations. Turns Ratio 1:2 CT ± 5% Primary Inductance 600 µH min. @ 772 kHz Primary Leakage Inductance 1.3 µH max. @ 772 kHz Secondary Leakage Inductance 0.4 µH max. @ 772 kHz Interwinding Capacitance 23 pF max. ET-constant 16 V- µs min. for T1 12 V- µs min. for E1 Table A2. Transformer Specifications Turns Ratio(s) Manufacturer Part Number Package Type 1:2CT Pulse Engineering PE-65351 1.5 kV through-hole, single Schott 67129300 Bel Fuse 0553-0013-HC dual 1:2CT Pulse Engineering PE-64951 1.5 kV through-hole, dual Bel Fuse 0553-0013-1J dual 1:2CT Pulse Engineering PE-65761 1.5 kVsurface-mount, dual Bel Fuse S553-0013-03 1:2CT Pulse Engineering PE-65835 3 kV through-hole, single EN60950, EN41003 approved Table A3. Recommended Transformers CS61577 28 DS155PP2 |
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