CS61880 Datasheet | Cirrus Logic

Features Octal E1 Short-haul Line Interface Unit Low Power No External ponent Changes for 120 Ω / 75 Ω Operation Pulse Shapes can be customized by the user Internal AMI, or HDB3 Encoding/Decoding LOS Detection per ITU G.775 or 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 (<50 m A) TX Drivers with Fast High-Z and Power Down JTAG Boundary Scan pliant to IEEE 1149.1 144-Pin LQFP or 160-Pin FBGA Package ORDERING INFORMATION CS61880-IQ CS61880-IB 144-pin LQFP 160-pin FBGA Description The CS61880 is a full-featured Octal E1 short-haul LIU that supports 2.048 Mbps data transmission for both E1 75 Ω and E1 120 Ω applications. Each channel provides crystal-less jitter attenuation that plies with the most stringent standards. Each channel also provides internal AMI/HDB3 encoding/decoding. To support enhanced 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 CS61880 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. Additionally, the internal line matching circuitry reduces the external ponent count. All transmitters have controls for independent power down and High-Z. Each receiver provides reliable data recovery with over 12 d B of cable attenuation. The receiver also incorporates LOS detection pliant to the most recent specifications. LOS Decoder RCLK RPOS RNEG LOS Receiver Clock Recovery Data Recovery RTIP Analog Loopback RRING G.772 Monitor Remote Loopback Digital Loopback Jitter Attenuator Driver Transmit Control Pulse Shaper TCLK TPOS TNEG TTIP TRING 0 1 7 JTAG Serial Port JTAG Interface Host Interface Host Serial/Parallel...