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CS61884-IQ Datasheet(PDF) 1 Page - Cirrus Logic |
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CS61884-IQ Datasheet(HTML) 1 Page - Cirrus Logic |
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1 / 71 page  1 Copyright © Cirrus Logic, Inc. 2005 (All Rights Reserved) http://www.cirrus.com CS61884 Octal T1/E1/J1 Line Interface Unit Features Industry-standard Footprint Octal E1/T1/J1 Short-haul Line Interface Unit Low Power No external component changes for 100 Ω/120 Ω/75 Ω operation. Pulse shapes can be customized by the user. Internal AMI, B8ZS, or HDB3 Encoding/Decoding LOS Detection per T1.231, ITU G.775, ETSI 300-233 G.772 Non-Intrusive Monitoring G.703 BITS Clock Recovery Crystal-less Jitter Attenuation Serial/Parallel Microprocessor Control Interfaces Transmitter Short Circuit Current Limiter (<50mA) TX Drivers with Fast High-Z and Power Down JTAG boundary scan compliant to IEEE 1149.1. 144-Pin LQFP or 160-Pin BGA Package ORDERING INFORMATION CS61884-IQ 144-pin LQFP CS61884-IQZ 144-pin LQFP, Lead Free CS61884-IB 160-pin FBGA Description The CS61884 is a full-featured octal E1/T1/J1 short-haul LIU that supports both 1.544 Mbps or 2.048 Mbps data transmission. Each channel provides crystal-less jitter attenuation that complies with the most stringent stan- dards. Each channel also provides internal AMI/B8ZS/HDB3 encoding/decoding. To support en- hanced system diagnostics, channel zero can be configured for G.772 non-intrusive monitoring of any of the other 7 channels’ receive or transmit paths. The CS61884 makes use of ultra-low-power, matched- impedance transmitters and receivers to reduce power beyond that achieved by traditional driver designs. By achieving a more precise line match, this technique also provides superior return loss characteristics. Additional- ly, the internal line matching circuitry reduces the external component count. All transmitters have controls for independent power down and High-Z. Each receiver provides reliable data recovery with over 12 dB of cable attenuation. The receiver also incorpo- rates LOS detection compliant to the most recent specifications. RPOS RNEG TPOS TNEG TCLK LOS RTIP RRING TTIP TRING RCLK 0 1 7 JTAG Interface Driver Receiver LOS Transmit Control Pulse Shaper Data Recovery Jitter Attenuator Clock Recovery Host Interface JTAG Serial Port Host Serial/Parallel Port AUG ‘05 DS485F1 |
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