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.
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