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DS26521LN Datasheet(PDF) 10 Page - Maxim Integrated Products |
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DS26521LN Datasheet(HTML) 10 Page - Maxim Integrated Products |
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10 / 258 page  DS26521 Single T1/E1/J1 Transceiver 10 of 258 2. FEATURE HIGHLIGHTS 2.1 General Single-port member of the TEX-series transceiver family of devices Software compatible with the DS26522 dual, DS26524 quad, and DS26528 octal transceivers 64-pin LQFP package 3.3V supply with 5V tolerant inputs and outputs IEEE 1149.1 JTAG boundary scan Development support includes evaluation kit, driver source code, and reference designs 2.2 Line Interface Requires a single master clock (MCLK) for both E1 and T1 operation. Master clock can be 1.544MHz, 2.048MHz, 3.088MHz, 4.096MHz, 6.276MHz, 8.192MHz, 12.552MHz, or 16.384MHz Fully software configurable Short- and long-haul applications Ranges include 0dB to -43dB, 0dB to -30dB, 0dB to 20dB, and 0dB to -12dB for E1; 0dB to -36dB, 0dB to 30dB, 0dB to 20dB, and 0dB to -15dB for T1 Receiver signal level indication from -2.5dB to -36dB in T1 mode and -2.5dB to -44dB in E1 mode in 2.5dB increments Internal receive termination option for 75 Ω, 100Ω, 110Ω, and 120Ω lines Monitor application gain settings of 14dB, 20dB, 26dB, and 32dB G.703 receive synchronization signal mode Flexible transmit waveform generation T1 DSX-1 line build-outs T1 CSU line build-outs of 0dB, -7.5dB, -15dB, and -22.5dB E1 waveforms include G.703 waveshapes for both 75 Ω coax and 120Ω twisted cables Analog loss-of-signal detection AIS generation independent of loopbacks Alternating ones and zeros generation Receiver power-down Transmitter power-down Transmitter short-circuit limiter with current-limit-exceeded indication Transmit open-circuit-detected indication 2.3 Clock Synthesizer Output frequencies include 2.048MHz, 4.096MHz, 8.192MHz, and 16.384MHz Derived from user-selected recovered receive clock 2.4 Jitter Attenuator 32-bit or 128-bit crystal-less jitter attenuator Requires only a 1.544MHz or 2.048MHz master clock or multiple thereof, for both E1 and T1 operation Can be placed in either the receive or transmit path or disabled Limit trip indication 2.5 Framer/Formatter Fully independent transmit and receive functionality Full receive and transmit path transparency T1 framing formats D4 and ESF per T1.403, and expanded SLC-96 support (TR-TSY-008) E1 FAS framing and CRC-4 multiframe per G.704, G.706, and G.732 CAS multiframe Transmit-side synchronizer Transmit midpath CRC recalculate (E1) |
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