841N254B Overview
The 841N254B is a 4-output clock synthesizer designed for S-RIO 1.3 and 2.0 reference clock applications. The device generates four copies of a selectable 250MHz, 156.25MHz, 125MHz or 100MHz clock signal with excellent phase jitter performance. The four outputs are organized in two banks of two LVDS and two HCSL outputs.
841N254B Key Features
- Fourth generation FemtoClock® (NG) technology
- Selectable 250MHz, 156.25MHz, 125MHz or 100MHz output
- Four differential clock outputs (two LVDS and two HCSL outputs)
- Crystal interface designed for 25MHz, parallel resonant crystal
- RMS phase jitter at 156.25MHz, using a 25MHz crystal (1MHz
- 20MHz): 0.27ps (typical)
- RMS phase jitter at 156.25MHz, using a 25MHz crystal (12kHz
- 20MHz): 0.32ps (typical)
- Power supply noise rejection PSNR: -50dB (typical)
- LVCMOS interface levels for the frequency select input
