General Description

The ICS849N2505I is a clock synthesizer designed for wireless

infrastructure applications.

The device generates a selectable 25MHz, 50MHz, 125MHz or

156.25MHz clock signal from a 10MHz input with excellent phase

jitter performance.

The device uses IDT’s fourth generation FemtoClock® NG

technology for an optimum of high clock frequency and low phase

noise performance, combined with a low power consumption and

high power supply noise rejection.

The device supports a 3.3V voltage supply and is packaged in a

small, lead-free (RoHS 6) 32-lead VFQFN package.

The extended temperature range supports wireless infrastructure,

telecommunication and networking end equipment requirements.

The device is a member of the high-performance clock family from

IDT.

Features

• Fourth generation FemtoClock® Next Generation (NG)

technology

• Selectable 25MHz, 50MHz, 125MHz or 156.25MHz output clock

synthesized from a 10MHz fundamental mode crystal or 10MHz

differential input

• Four selectable differential LVPECL or LVDS outputs

• Crystal interface designed for 10MHz,

12pF parallel resonant crystal

• RMS phase jitter (12kHz - 20MHz): 0.336ps (typical),

LVPECL outputs

• Period jitter: 2.7ps (maximum), LVPECL outputs

• Full 3.3V supply voltage

• Available in Lead-free (RoHS 6) packageing

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