General Description

The 8T49NS010 is a Clock Synthesizer and Fanout Buffer/Divider.

When used with an external crystal, the 8T49NS010 generates high

performance timing geared towards the communications and datacom markets, especially for applications demanding extremely low

phase noise jitter, such as 10, 40 and 100GE.

The 8T49NS010 provides versatile frequency configurations and

output formats and is optimized to deliver excellent phase noise

performance. The device delivers an optimum combination of high

clock frequency and low phase noise performance, combined with

high power supply noise rejection.

The 8T49NS010 supports two types of output levels. FORMAT #1

Outputs provide an output level with 750mV typical swing, and

requires external DC termination. FORMAT #2 Outputs provide a

similar swing level which does not require DC termination.

The device can be configured through an I2C serial interface and is

offered in a lead-free (RoHS6) 56-pin VFQFN package.

The extended temperature range supports telecommunication and

networking end equipment requirements.

特性 Features

? Ten differential outputs

? The input operates in full differential mode (LVDS, LVPECL) or

single-ended LVCMOS mode

? Can be driven from a crystal or differential clock

? Support of output power-down

? Excellent clock output phase noise

Offset Output Frequency Single-side Band Phase Noise

100kHz 156.25MHz -144 dBc/Hz

? Phase Noise RMS, 12kHz to 20MHz integration range:

84fs (typical)

? LVCMOS compatible I2C serial interface

? I

2C control inputs are 3.3V tolerant

? Full 3.3V supply voltage

? Lead-free (RoHS 6) 56-pin VFQFN packaging

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