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