General Description

The 841608 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 841608 can

also drive the high-speed sRIO and PCIe SerDes clock inputs of

communication processors, DSPs, switches and bridges.

Features

• Eight HCSL 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 (2.5 Gb/S) and Gen 2 (5 Gb/s) jitter compliant

• RMS phase jitter at 125MHz, using a 25MHz crystal

(1.875MHz – 20MHz): 0.37ps (typical)

• Full 3.3V operating supply

• -40°C to 85°C ambient operating temperature

• Available in lead-free (RoHS 6) package