General Description

The IDT8N4Q001 is a Quad-Frequency Programmable Clock

Oscillator with very flexible frequency programming capabilities. The

device uses IDT’s fourth generation FemtoClock? NG technology for

an optimum high clock frequency and low phase noise performance.

The device accepts 2.5V or 3.3V supply and is packaged in a small,

lead-free (RoHS 6) 10-lead ceramic 5mm x 7mm x 1.55mm package.

Besides the four default power-up frequencies set by the FSEL0 and

FSEL1 pins, the IDT8N4Q001 can be programmed via the I2C

interface to output clock frequencies between 15.476MHz to

866.67MHz and from 975MHz to 1,300MHz to a very high degree of

precision with a frequency step size of 435.9Hz ÷ N (N is the PLL

output divider). Since the FSEL0 and FSEL1 pins are mapped to four

independent PLL divider registers (P, MINT, MFRAC and N),

reprogramming those registers to other frequencies under control of

FSEL0 and FSEL1 is supported. The extended temperature range

supports wireless infrastructure, telecommunication and networking

end equipment requirements.

特性 Features

? Fourth generation FemtoClock? NG technology

? Programmable clock output frequency from 15.476MHz to

866.67MHz and from 975MHz to 1,300MHz

? Four power-up default frequencies (see part number order

codes), re-programmable by I2C

? I2C programming interface for the output clock frequency and

internal PLL control registers

? Frequency programming resolution is 435.9Hz ÷N

? One 2.5V, 3.3V LVDS clock output

? Two control inputs for the power-up default frequency

? LVCMOS/LVTTL compatible control inputs

? RMS phase jitter @ 156.25MHz (12kHz - 20MHz): 0.253ps

(typical), integer PLL feedback configuration

? RMS phase jitter @ 156.25MHz (1kHz - 40MHz): 0.263ps

(typical), integer PLL feedback configuration

? Full 2.5V or 3.3V supply modes

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

? Available in Lead-free (RoHS 6) package