2351
The 78P2351 is Teridian's second generation Line Interface Unit (LIU) for 155 Mbit/s SDH/SONET (OC-3, STS-3, or STM-1) and 140 Mbit/s PDH (E4) applications. The device is a single chip solution that includes an integrated CDR in the transmit path for flexible NRZ to CMI conversion. The device can interface to 75Ω coaxial cable using CMI coding or directly to a fiber optics module using NRZ coding. The 78P2351 is compliant with all respective ANSI, ITU-T, and Telcordia standards for jitter tolerance, generation, and transfer. The 78P2351R is Teridian's second generation Line Interface Unit (LIU) for 155 Mbit/s electrical SONET/SDH interfaces (ES1, STM-1e). The device is a single chip solution that includes an integrated Clock Recovery Unit in the transmit path for simple, cost efficient NRZ to CMI conversion. With integrated CDR capabilities in the transmit path and a small 7x7mm QFN package, the 78P2351R is ideal for new STM-1e Small Form-factor Pluggable (SFP) transceiver modules.Features
ITU-T G.703 single port LIU for E4 or STS-3, CMI-coded coax transmissionCompliant with ANSI T1.105.03-1994; ITU-T G.751, G.813, G.823, G.825, G.958; and Telcordia GR-253-CORE jitter performance.
Receiver Loss of Signal (LOS) detection per G.783
Integrated adaptive CMI equalizer and CDR in receive path handles over 12.7dB of cable loss
Serial, LVPECL-compatible system interface with integrated transmit CRU for NRZ to CMI conversion
Configurable via HW control pins or 4-wire serial interface
100-pin LQFP
