Ultra Low Jitter PLL Crystal Oscillator 2.5 x 2.0mm
2.5V/3.3V CML XO
NX256
2.5 x 2.0mm Ceramic SMD
Package:
(Scale: none; dimensions are in mm)
Product Features
•
Very low phase jitter - < 1.0ps RMS max.
•
Wide frequency range - 5 ~ 1000MHz
•
Thicker crystal for improved reliability
•
Low supply current - 70mA max.
2.25
Recommended Land Pattern:
2.70
1.50
0.70
0.60
•
Pb-free & RoHS compliant
0.95
0.35
Product Description
The NX256 XO series is a high performance
CML crystal oscillator family with very low
jitter performance. It supports various
options including wider frequency range,
2.5/3.3 voltage, various stabilities, and
different package sizes. It is designed to
meet the clock source specifications for
communication systems, and other high
performance equipment.
Pin Functions:
Pin
Function
1
2
3
4
5
6
0.57
1.11
•
Industrial Temperature Range
OE Function
N/C
Ground
Q
Q
V
CC
Applications
•
Networking systems
•
Servers and storage systems
•
Profession video equipments
•
Test and measurement
•
FPGA/ASIC clock generation
*Extended high frequency power decoupling is recommended (see test circuit for minimum
recommendation). To ensure optimal performance, do not route RF traces beneath the
package.
Part Ordering Information:
UX 70
V
NX 256
A
B
C
I
1
FFFF.FFFFFF
FFFF.FFFFFF
Stability and Temp Range:
Stability Temp Range
A = +/-20 ppm -20/+70°C
B = +/-25 ppm -20/+70°C
C = +/-50 ppm -20/+70°C
D = +/-25 ppm -40/+85°C
E = +/-50 ppm -40/+85°C
Voltage:
1=+3.3V
2=+2.5V
Frequency:
FFFF.FFFFFF
MHz, “4 digits/decimal/6 digits” format
SaRonix-eCera™ is a Pericom® Semiconductor company
•
US: +1-408-232-9100 TW: +886-3-4518888
NX256
•
www.pericom.com
Rev D
08/12/15
15-0071
All specifications are subject to change without notice.
1
2.5V/3.3V CML XO
NX256
Ultra Low Jitter PLL Crystal Oscillator 2.5 x 2.5mm
Electrical Performance
Parameter
Min.
Typ.
Max.
Units
Notes
Output Frequency
Supply Voltage
Supply Current, Output Enabled
Supply Current, Output Disabled only
Frequency Stability
Operating Temperature Range
Output Load
Differential Output Voltage. V
OD
Output Offset Voltage. V
OS
Duty Cycle
Rise and Fall Time
Jitter, Accumulated , RMS (1-σ)
< 40MHz
Jitter, Phase, RMS
Jitter, pk-pk
40 to 1000MHz
125MHz, 156.25MHz
5
3.135
2.375
3.3
2.5
1000
3.465
2.625
70
40
±50
MHz
V
mA
mA
ppm
°C
V
V
%
ps
ps
ps
ps
ps
ps
Measured 50% V
CC
Measured 20/80% of waveform
20.000 adjacent periods
12kHz to 5 MHz frequency band
12kHz to 20 MHz frequency band
12kHz to 20 MHz frequency band
100,000 random periods
See ordering options
See ordering options
Output requires termination
See ordering options
-40
0.35
1.125
45
+85
100Ω connected between outputs
0.65
1.375
55
400
6
0.4
0.4
0.4
1
1
0.6
40
Notes:
1. Stability includes all combinations of operating temperature, load changes, rated input (supply) voltage changes, initial calibration tolerance (25°C),
aging (1 year at 25°C average effective ambient temperature), shock and vibration.
2. Phase jitter typical value is depending on output frequencies.
3. For specifications other than those listed, please contact sales.
Output Enable / Disable Function
Parameter
Min.
Typ.
Max.
Units
Notes
Input Voltage (pin 1), Output Enable
Input Voltage (pin 1), Output Disable (low power standby)
Output Disable Delay
Output Enable Delay
Start up Time
0.7 V
CC
0.3 V
CC
100
100
10
V
V
ns
ns
ms
or open
Output is Hi-Z
Absolute Maximum Ratings
Parameter
Min.
Typ.
Max.
Units
Notes
Storage Temperature
-55
+125
°C
For the latest product information visit:
http://www.pericom.com/products/crystals-and-crystal-oscillators/hiflex-xo/?part=NX256
For test circuit go to:
http://www.pericom.com/pdf/sre/tc-CML.pdf
For soldering reflow profile and reliability test ratings go to:
http://www.pericom.com/pdf/sre/reflow.pdf
For tape and reel information go to:
http://www.pericom.com/pdf/sre/tr_2520_xo.pdf
SaRonix-eCera™ is a Pericom® Semiconductor company
•
US: +1-408-232-9100 TW: +886-3-4518888
NX256
•
www.pericom.com
Rev D
08/12/15
15-0071
All specifications are subject to change without notice.
2
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