SCAN12100

www.DataSheet4U.com SCAN12100 1228.8 and 614.4 Mbps CPRI SerDes November 2006 SCAN12100 1228.8 and 614.4 Mbps CPRI SerDes with Auto RE Sync and Precision Delay Calibration Measurement General Description The SCAN12100 is a 1228.8 and 614.4 Mbps serializer/deseralizer (SerDes) for high-speed bidirectional serial data transmission over FR-4 printed circuit board backplanes, balanced cables, and optical fiber. The SCAN12100 integrates precision delay calibration measurement (DCM) circuitry that measures link delay components to better than ± 800 ps accuracy. The SCAN12100 features independent transmit and receive PLLs, on-chip oscillator, and intelligent clock management circuitry to automatically perform remote radio head synchronization and reduce the cost and complexity of external clock networks. The SCAN12100 is programmable though an MDIO interface as well as through pins, featuring configurable transmitter deemphasis, receiver equalization, speed rate selection, internal pattern generation/verification, and loop back modes. In addition to at-speed BIST, the SCAN12100 includes IEEE 1149.1 and 1149.6 testability. Note: For a full SCAN12100 datasheet please contact your local National Semiconductor representitive ■ DCM also measures chip and other delays to ≤ ± 1200 ps ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ accuracy Deterministic chip latency Automatic receiver lock and RE synchronization without reference clock or external crystal Independent transmit and receive PLLs for seamless RE sy...