Features
- Four 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
841604I - Block Diagram
Description
The 841604I 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 841604I can also drive the high-speed sRIO and PCIe SerDes clock inputs of communication processors, DSPs, switches and bridges.
Knowledge Base
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What is the typical differential voltage swing for the 841604I FemtoClock® Crystal-to-HCSL Clock Generator?
The 841604I has a HCSL output type. It is a 14mA current output with an external 50 ohm pull down resistor. It will have 700mV DC swing or 1400mV AC swing on the output.
Oct 31, 2016
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