The M69897VP multiplexer chip is an integrated serialization SONET OC-48 (2.488 Gbps) interface device. The chip performs parallel-to-serial functions in conformance with SONET/SDH transmission standards. The device is suitable for SONET-based ATM applications. The merits of SOI (Silicon-On-Insulator) technology, such as low voltage operation, low substrate noise and good compatibility with standard CMOS technology, are fully utilized in the chip design to achieve low jitter and low power operation and small package outline of 64-pin PQFP.