IDT8N4S271 Datasheet, PDF (1/18 Pages) Integrated Device Technology – Fourth generation FemtoClock

LVDS Frequency-Programmable
Crystal Oscillator
IDT8N4S271
DATA SHEET
General Description
The IDT8N4S271 is a Factory Frequency-Programmable Crystal
Oscillator with very flexible frequency 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) 6-lead ceramic 5mm x 7mm
x 1.55mm package.
The device can be factory programmed to any in the range from
15.476MHz to 866.67MHz and from 975MHz to 1,300MHz and
supports a very high degree of frequency precision of 218Hz or
better. The extended temperature range supports wireless
infrastructure, telecommunication and networking end equipment
requirements.
Features
• Fourth generation FemtoClock^® NG technology
• Factory-programmable clock output frequency from 15.476MHz to
866.67MHz and from 975MHz to 1,300MHz
• Frequency programming resolution is 218Hz and better
• One 2.5V, 3.3V LVDS clock output
• Output enable control (positive polarity), LVCMOS/LVTTL
compatible
• RMS phase jitter @ 231.25MHz (12kHz - 20MHz): 
0.48ps (typical), integer PLL feedback configuration
• RMS phase jitter @ 231.25MHz (1kHz - 40MHz): 
0.50ps (typical), integer PLL feedback configuration
• 2.5V or 3.3V supply
• -40°C to 85°C ambient operating temperature
• Available in a lead-free (RoHS 6) 6-pin ceramic package
Block Diagram
OSC ^÷P
f_XTAL
2
Pullup
OE
PFD
&
LPF
FemtoClock^® NG
VCO
÷N
1950-2600MHz
÷MINT, MFRAC
25
7
Configuration Register (ROM)
Pin Assignment
DNU 1
6 V_DD
Q
OE 2
5 nQ
nQ
GND 3
4Q
IDT8N4S271
6-lead ceramic 5mm x 7mm x 1.55mm
package body
CD Package
Top View
IDT8N4S271CCD REVISION A NOVEMBER 29, 2012
1
©2012 Integrated Device Technology, Inc.