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XRT83L314 Datasheet(PDF) 2 Page - Exar Corporation |
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XRT83L314 Datasheet(HTML) 2 Page - Exar Corporation |
2 / 84 page XRT83L314 14-CHANNEL T1/E1/J1 LONG-HAUL/SHORT-HAUL LINE INTERFACE UNIT REV. 1.0.0 2 FEATURES • Fully integrated 14-Channel short haul and long haul transceivers for T1/J1 (1.544MHz) and E1 (2.048MHz) applications. • T1/E1/J1 short haul, long haul, and clock rate are per port selectable through software without changing components. • Internal Impedance matching on both receive and transmit for 75 Ω (E1), 100Ω (T1), 110Ω (J1), and 120 Ω (E1) applications are per port selectable through software without changing components. • Power down on a per channel basis with independent receive and transmit selection. • Five pre-programmed transmit pulse settings for T1 short haul applications. • Arbitrary pulse generator for T1 and E1 modes. • Transmit line build outs (LBO) for T1 long haul applications from 0dB to -22.5dB in three -7.5dB steps on a per channel basis. • On-Chip transmit short-circuit protection and limiting protects line drivers from damage on a per channel basis. • Independent Crystal-Less digital jitter attenuators (JA) with 32-Bit or 64-Bit FIFO for the receive and transmit paths • On-Chip frequency multiplier generates T1 or E1 master clocks from a variety of external clock sources (8, 16, 56, 64, 128, 256kHz and 1X, 2X, 4X, 8X T1 or E1) • Driver failure monitor output (DMO) alerts of possible system or external component problems. • Transmit outputs and receive inputs may be "High" impedance for protection or redundancy applications on a per channel basis. • Support for automatic protection switching. • 1:1 and 1+1 protection without relays. • Selectable receiver sensitivity from 0 to 36dB cable loss in T1 @ 772kHz, and 0 to 43dB cable loss in E1 @ 1,024kHz. • Receive monitor mode handles 0 to 29dB resistive attenuation (flat loss) along with 0 to 6dB cable loss for both T1 and E1. • Receiver line attenuation indication output in 1dB steps. • Loss of signal (RLOS) according to ITU-T G.775/ ETS300233 (E1) and ANSI T1.403 (T1/J1). • Programmable receive slicer threshold (45%, 50%, 55%, or 68%) for improved receiver interference immunity. • Programmable data stream muting upon RLOS detection. • On-Chip HDB3/B8ZS encoder/decoder with an internal 16-bit LCV counter for each channel. • On-Chip digital clock recovery circuit for high input jitter tolerance. • QRSS pattern generator and detection for testing and monitoring. • Error and bipolar violation insertion and detection. • Transmit all ones (TAOS) and in-band network loop up and loop down code generation. • Automatic loop code detection for remote loopback activation. • Supports local analog, remote, digital, and dual loopback modes. • Low Power dissipation: 170mW per channel (50% density). • 250mW per channel maximum power dissipation (100% density). • Single 3.3V supply operation (3V to 5V I/O tolerant). • 304-Pin TBGA package • -40°C to +85°C Temperature Range • Supports gapped clocks for mapper/multiplexer applications. PRODUCT ORDERING INFORMATION PRODUCT NUMBER PACKAGE TYPE OPERATING TEMPERATURE RANGE XRT83L314IB 304 Lead TBGA -40°C to +85°C |
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