FemtoClock Crystal-to-HCSL Clock Generator

The 841602 is an optimized PCIe and sRIO clock generator. The device uses a 25MHz parallel crystal to generate 100MHz and 125MHz clock signals, replacing solutions requiring multiple oscillator and fanout buffer solutions. The device has excellent phase jitter (< 1ps rms) suitable to clock components requiring precise and low-jitter PCIe or sRIO or both clock signals. Designed for telecom, networking and industrial applications, the 841602 can also drive the high-speed sRIO and PCIe SerDes clock inputs of communication processors, DSPs, switches and bridges.

• Two differential clock outputs: configurable for PCIe (100MHz) and sRIO (125MHz) clock signals
• Selectable crystal oscillator interface, 25MHz, 18pF parallel resonant crystal or LVCMOS/LVTTL single-ended reference clock input
• Supports the following output frequencies: 100MHz or 125MHz
• VCO: 500MHz
• PLL bypass and output enable
• PCI Express (2.5Gb/s) and Gen 2 (5 Gb/s) jitter compliant
• RMS phase jitter, 125MHz, using a 25MHz crystal: (1.875MHz - 20MHz): 0.45ps (typical)
• Full 3.3V power supply mode
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package