MAX3674

19-2483; Rev 0; 12/07 High-Performance, Dual-Output, Network Clock Synthesizer www.datasheet4u.com General Description Features ♦ 21.25MHz to 1360MHz Programmable PLL Synthesized Output Clocks ♦ Two Differential LVPECL-Compatible Outputs ♦ Cycle-to-Cycle Jitter 1.6ps RMS and Period Jitter 0.9ps RMS at 500MHz ♦ On-Chip Crystal Oscillator or Selectable LVCMOS-Compatible Reference Clock Input ♦ Excellent Power-Supply Noise Rejection ♦ Parallel or 2-Wire I2C Programming Interface ♦ Lock Indicator Output ♦ +3.3V Power Supply ♦ Power Consumption: 396mW at 3.3V ♦ 48-Pin LQFP Pb-Free Package ♦ -40°C to +85°C Temperature Range MAX3674 The MAX3674 is a high-performance network clock synthesizer IC for networking, computing, and telecom applications. It integrates a crystal oscillator, a lownoise phase-locked loop (PLL), programmable dividers, and high-frequency LVPECL output buffers. The PLL generates a high-frequency clock based on a low-frequency reference clock provided by the on-chip crystal oscillator or an external LVCMOS clock. The MAX3674 has excellent period jitter, cycle-to-cycle jitter, and supply noise rejection performance. With output frequencies programmable from 21.25MHz to 1360MHz and support of two differential PECL output signals, the device provides a versatile solution for the most demanding clock applications. Programming is accomplished through a 2-wire I2C bus or parallel interface that can change the output frequency on demand for frequency margining. Both...