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XRT5997 Datasheet(PDF) 1 Page - Exar Corporation |
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XRT5997 Datasheet(HTML) 1 Page - Exar Corporation |
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1 / 37 page  EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 • (510) 668-7000 • FAX (510) 668-7017 • www.exar.com Rev. 1.0.0 XRT5997 Seven-Channel E1 Line Interface Unit November 1999-2 l Generates Transmit Output Pulses that are Compliant with the ITU-T G.703 Pulse Template Requirement for 2.048Mbps (E1) Rates l On-Chip Pulse Shaping for both 75 Ω and 120Ω line drivers l Receiver Can Either Be Transformer or Capacitive-Coupled to the Line l Detects and Clears LOS (Loss of Signal) Per ITU-T G.775 l Compliant with the ITU-T G.823 Jitter Tolerance Requirements l Compliant with ITU G. 703 EOS Over-voltage protection Requirement l Logic Inputs Accept Either 3.3V or 5.0V Levels l Operates over the Industrial Temperature Range l Ultra Low Power Dissipation l +3.3V Supply Operation APPLICATIONS l PDH Multiplexers l SDH Multiplexers l Digital Cross-Connect Systems l DECT (Digital European Cordless Telephone) Base Stations l CSU/DSU Equipment GENERAL DESCRIPTION The XRT5997 is an optimized seven-channel analog E1 line interface unit fabricated using low power 3.3V CMOS technology. Each channel consists of both a Transmitter and a Receiver function. The Transmitter accepts a TTL or CMOS level signal from the Terminal Equipment; and outputs this data to the line via bipolar pulses that are compliant to the ITU-T G.703 pulse template for E1. The Receiver accepts an attenuated bipolar line signal (from the remote terminal equipment) and outputs this data to the (near-end) terminal equip- ment via CMOS level signals. ORDERING INFORMATION Part No. Package Operating Temperature Range XRT5997IV 100-Lead TQFP (14 x 14 x 1.4 mm) -40°C to +85°C FEATURES The Main features are as follows: l Consists of Seven (7) Independent E1 (CEPT) Line Interface Units (Transmitter and Receiver) Each Receiver input can be transformer or capacitive- coupled to the line. The Receiver input is transformer- coupled to the line, using a 2:1 step-down transformer. Each Transmitter is coupled to the line using a 1:2 step- up transformer. This same configuration is applicable for both balanced (120 Ω ) and unbalanced (75Ω ) interfaces. |
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Similar Description - XRT5997 |
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