XRT5997IV-F MaxLinear

XRT5997 Seven-Channel E1 Line Interface Unit November 1999-2 FEATURES The Main features are as follows: l Logic Inputs Accept Either 3.3V or 5.0V Levels l Consists of Seven (7) Independent E1 (CEPT) l Operates over the Industrial Temperature Range Line Interface Units (Transmitter and Receiver) l Ultra Low Power Dissipation l Generates Transmit Output Pulses that are l +3.3V Supply Operation Compliant with the ITU-T G.703 Pulse Template Requirement for 2.048Mbps (E1) Rates APPLICATIONS l On-Chip Pulse Shaping for both 75 and 120 line drivers l PDH Multiplexers l Receiver Can Either Be Transformer or l SDH Multiplexers l Digital Cross-Connect Systems Capacitive-Coupled to the Line l DECT (Digital European Cordless Telephone) l Detects and Clears LOS (Loss of Signal) Per Base Stations ITU-T G.775 l CSU/DSU Equipment l Compliant with the ITU-T G.823 Jitter Tolerance Requirements l Compliant with ITU G. 703 EOS Over-voltage protection Requirement GENERAL DESCRIPTION Each Receiver input can be transformer or capacitive- The XRT5997 is an optimized seven-channel analog coupled to the line. The Receiver input is transformer- E1 line interface unit fabricated using low power 3.3V coupled to the line, using a 2:1 step-down transformer. CMOS technology. Each channel consists of both a Each Transmitter is coupled to the line using a 1:2 step- Transmitter and a Receiver function. The Transmitter accepts a TTL or CMOS level signal from the Terminal up transformer. This same configuration is applicable for both balanced (120 ) and unbalanced (75 ) Equipment and outputs this data to the line via bipolar interfaces. 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) -40C to +85C Rev. 1.0.0 EXAR Corporation, 48720 Kato Road, Fremont, CA 94538 (510) 668-7000 FAX (510) 668-7017 www.exar.comXRT5997 Channel 7 Channel 6 Channel 5 Channel 4 Channel 3 RxLOS Channel 2 Channe l 1 RTIP RxPOS Receiv Peak Receive Receive Peak Detector/ LOS Receive Output LOS e DeStectliceor/ Detecto InOteutrputfac Equalizer Slicer Detector Interface Equalizer RRing r r e RxNEG TTIP TxPOS Pulse Transmit Pulse Shaping Transmit Input TxNEG Shaping Input Circuit Interface Circuit Interface TxClk TRing Figure 1. XRT5997 Block Diagram Rev. 1.0.0 2