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Motore di ricerca datesheet componenti elettronici |
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Motore di ricerca datesheet componenti elettronici |
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BT8376EPF Scheda tecnica(PDF) 33 Page - Synaptics Incorporated. |
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BT8376EPF Scheda tecnica(HTML) 33 Page - Synaptics Incorporated. |
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33 / 323 page  Bt8370/8375/8376 2.0 Circuit Description Fully Integrated T1/E1 Framer and Line Interface 2.2 Receive Line Interface Unit N8370DSE Conexant 2-5 2.2 Receive Line Interface Unit The Receive Line Interface Unit (RLIU) recovers clock and data from the bipolar Alternate Mark Inversion (AMI) line signal that has been attenuated and distorted due to the characteristics of the line. In the Bt8370 device, the RLIU is sensitive to signals attenuated in the range of 0 to –48 dB in E1 and T1 modes. In the Bt8375 and Bt8376 devices, RLIU sensitivity is limited for short-haul only applications. In addition, the RLIU interfaces at the DSX-1 Bridge Monitor Level (–20 dB for DS1 and –30 dB for E1/CEPT). The RLIU converts AMI pulses into P and N rail Non-Return to 0 (NRZ) data. The AMI pulses are input on the receive tip and ring pins: RTIP and RRING (Figure 2-4). The P and N rail NRZ data is then passed to the RCVR. The RCVR dual rail output is available on RPOSO/RNEGO. Figure 2-5 illustrates the relationship between the AMI received signal, the recovered clock, and the RCVR dual rail outputs. Figure 2-4. RLIU Diagram Adaptive Equalizer ADC VGA Data Slicer RPLL RCKI RTIP RRING RPOSO RNEGO To JAT From JAT Analog Loopback RNEGI RPOSI RNEGI RPOSI O 1 O 1 O 1 ALOOP RDIGI RJAT 1 O RXCLK ADC |
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