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DS3154 Datasheet(PDF) 5 Page - Maxim Integrated Products |
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DS3154 Datasheet(HTML) 5 Page - Maxim Integrated Products |
5 / 61 page DS3151/DS3152/DS3153/DS3154 Single/Dual/Triple/Quad DS3/E3/STS-1 LIUs 5 of 61 FEATURES (continued) Receiver AGC/equalizer block handles from 0 to 15dB of cable loss Loss-of-lock (LOL) PLL status indication Interfaces directly to a DSX monitor signal (~20dB flat loss) using built-in preamp Digital and analog loss-of-signal (LOS) detectors (ANSI T1.231 and ITU G.775) Optional B3ZS/HDB3 decoder Line-code violation output pin and counter Binary or bipolar framer interface On-board 2 15 - 1 and 223 - 1 PRBS detector Clock inversion for glueless interfacing Tri-state clock and data outputs support protection switching applications Per-channel power-down control Transmitter Binary or bipolar framer interface Gapped clock capable up to 51.84MHz Wide 50 ±20% transmit clock duty cycle Clock inversion for glueless interfacing Optional B3ZS/HDB3 encoder On-board 2 15 - 1 and 223 - 1 PRBS generator Complete DS3 AIS generator (ANSI T1.107) Unframed all-ones generator (E3 AIS) Line build-out (LBO) control Tri-state line driver outputs support protection switching applications Per-channel power-down control Output driver monitor 1. DETAILED DESCRIPTION The DS3151 (single), DS3152 (dual), DS3153 (triple), and DS3154 (quad) 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 or bipolar format. The transmitter accepts data in either binary or bipolar format, optionally performs B3ZS/HDB3 encoding, and drives standard pulse-shape waveforms onto 75 Ω coaxial cable. The jitter attenuator can be mapped into the receiver data path, mapped into the transmitter data path, or be disabled. The DS315x LIUs conform to the telecommunications standards listed in Table 1-A. Figure 1-1 shows the external components required for proper operation. |
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