General Description

The IDT8N4QV01 is a Quad-Frequency Programmable VCXO with

very flexible frequency and pull-range programming capabilities. The

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

an optimum of 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 4 default power-up frequencies set by the FSEL0 and

FSEL1 pins, the IDT8N4QV01 can be programmed via the I2C

interface to any output clock frequency 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 4

independent PLL, P, M and N 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

? I

2C programming interface for the output clock frequency, APR

and internal PLL control registers

? Frequency programming resolution is 435.9Hz ÷N

? Absolute pull-range (APR) programmable from ±4.5ppm to

±754.5ppm

? One 2.5V or 3.3V LVDS differential clock output

? Two control inputs for the power-up default frequency

? LVCMOS/LVTTL compatible control inputs

? RMS phase jitter @ 156.25MHz (12kHz - 20MHz): 0.494ps

(typical)

? RMS phase jitter @ 156.25MHz (1kHz - 40MHz): 0.594ps (typical)

? 2.5V or 3.3V supply voltage modes

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

? Lead-free (RoHS 6) packaging