General Description
The ICS83PN161i is LVPECL output synthesizer designed for
converting forward-error correction (FEC) clock frequencies in 10
GB Ethernet LAN/WAN transport applications. The device is
optimized for an input frequency of 156.25MHz and supports four
FEC rate conversions: 33/32, 255/237, 255/238 and 235/236. The
conversion rate is pin-selectable and one of four rates are supported
at a time. In the default configuration, an input clock of 156.25MHz is
converted to an output clock of 168.8294492MHz (255/236).
The device uses IDT's fourth Generation of FemtoClock® NG
technology to deliver low phase noise clocks combined with a low
power consumption. The RMS phase jitter at 168.8294492MHz
output frequency is 0.533ps (12kHz-20MHz integration range).

Features
• Fourth Generation FemtoClock® Next Generation (NG)
technology
• Footprint compatible with 5mm x 7mm differential oscillators
• 10 Gb Ethernet LAN/WAN FEC clock converter
• Supports 33/32, 255/237, 255/238, 255/236 rate conversions
• Optimized for an input clock frequency of 156.25MHz
• One differential LVPECL output pair
• CLK, nCLK input pair can accept the following levels: HCSL,
LVDS, LVPECL, LVHSTL and SSTL
• Output frequency range: 161.1328125MHz – 168.8294492MHz
• VCO range: 2.0GHz – 2.5GHz
• Cycle-to-cycle jitter: 18ps (typical)
• RMS phase jitter, 12kHz – 20MHz: 0.533ps (typical)
• Full 3.3V or 2.5V operating supply
• -40°C to 85°C ambient operating temperature
• Available in lead-free (RoHS 6) package