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DS32508N Datasheet(PDF) 9 Page - Maxim Integrated Products |
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DS32508N Datasheet(HTML) 9 Page - Maxim Integrated Products |
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9 / 130 page  DS32506/DS32508/DS32512 9 of 130 4. DETAILED DESCRIPTION The DS32506 (6 port), DS32508 (8 port), and DS32512 (12 port) LIUs perform the functions necessary for interfacing at the physical layer to DS3, E3, or STS-1 lines. Each LIU has independent receive and transmit paths and a built-in jitter attenuator. The receiver performs clock and data recovery from a B3ZS- or HDB3-coded alternate mark inversion (AMI) signal and monitors for loss of the incoming signal. The receiver optionally performs B3ZS/HDB3 decoding and outputs the recovered data in either binary (NRZ) or digital bipolar format. The transmitter accepts data in either binary (NRZ) or digital bipolar format, optionally performs B3ZS/HDB3 encoding, and drives standard pulse-shape waveforms onto 75 Ω coaxial cable. Both transmitter and receiver are high- impedance when VDD is out of spec to enable hot-swappable 1:1 and 1+1 board redundancy without relays. The jitter attenuator can be mapped into the receiver data path, mapped into the transmitter data path, or disabled. An on-chip clock adapter generates all line-rate clocks from a single input clock. Control interface options include 8- or 16-bit parallel, SPI, and hardware mode. The DS325xx LIUs conform to the telecommunications standards listed in Table 1-1. The external components required for proper operation are shown in Figure 4-1 and Figure 4-2. Figure 4-1. External Connections, Internal Termination Enabled TXP TXN RXP RXN 1.8V POWER PLANE GROUND PLANE TVDD RVDD JVDD TVSS RVSS JVSS 0.01μF 0.1μF 1μF 0.01μF 0.1μF 1μF 0.01μF 0.1μF 1μF 1:1 1:1 TXP TXN |
Similar Part No. - DS32508N |
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Similar Description - DS32508N |
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