文中介绍了一种 2 .5Gbps同步数字传输 光纤网络 (SDH SONET)芯片组。发送器由MAX3890 (合路器、时钟发生器 )和MAX386 7(激光驱动器 )组成 ,总随机抖动仅为 3.4psRMS,MAX3890可提供 2 .5Gbps时钟给MAX386 7的输入锁定 ,用于数据信号的再定时 ,使MAX386 7成为仅有的系统性抖动源 ,典型的系统性抖动≤ 50psRMS。接收器由MAX386 6 (TIA)、MAX3875(时钟及数据恢复 )和MAX3885(分路器 )组成 ,总随机性抖动仅 4 .6psRMS 系统性抖动约为 2 0psRMS。该芯片组对于ITU Bellcore关于 2 .5GbpsSDH SONET抖动规范有显著的设计裕量。 This paper presents a 2.5Gbps SDH SONET chipset. The transmitter consists of a MAX3890 (combiner, clock generator) and a MAX386 7 (laser driver) with a total random jitter of only 3.4 ps RMS. The MAX3890 provides a 2.5 Gbps clock for the MAX386 7 input lock for data signals Timing makes the MAX386 7 the only source of systematic jitter, with typical systematic jitter ≤ 50psRMS. The receiver consists of the MAX386 6 (TIA), the MAX3875 (clock and data recovery), and the MAX3885 (splitter) with a total random jitter of only 4.6 psi and a system jitter of about 20 ps RMS. The chipset has a significant design margin for ITU Bellcore’s 2.5Gbps SDH SONET jitter specifications.