Ultra Miniature SMD HCMOS TCXO
Model: FOX251 Series
RoHS Compliant / Pb Free
Rev. 2/22/2013
Page 1 of 1
http://www.foxonline.com/need_a_sample.htm
• PART NUMBER SELECTION
2 . 6 M a x
Model Number
Part Number
Supply Voltage (Vdd)
# 3
# 4
830-Frequency-xxxxx
830A-Frequency-xxxxx
830B-Frequency-xxxxx
FOX251C
FOX251D
FOX251G
3.3V±5%
2.8V±5%
2.5V±5%
T op
V ie w
2 . 1 M a x
# 2
# 1
• ELECTRICAL CHARACTERISTICS
Dot de note s
pin 1 .
MAX (unless otherwise noted)
PARAMETERS
Frequency Range (MHz)
Temperature Range
4.000 ~ 54.000
0 . 9 5 M a x
Operating (Topr)
Storage (Tstg)
Supply Voltage (Vdd)
Input Current (Idd)
Standby Current
-30ºC ~ +75ºC
-40ºC ~ +125ºC
+2.5V ~ +3.3 Vdc ±5%
See table below
10uA
B ottom
V ie w
# 1
# 4
# 2
# 3
Initial Frequency Tolerance @ 25ºC (after 2 reflows)
Frequency Stability
±1.5 PPM
0 . 6 5
0 . 1
Over Temp Range
±2.5 PPM
±0.2 PPM
±0.2 PPM
5nS
Over Supply Voltage Change (Vdd±5%)
Over Load Range (15pF ±10%)
Rise Time (10% ~ 90% Vdd) (tr)
Fall Time (90% ~ 10% Vdd) (tF)
Symmetry (50% Vdd)
output Voltage (Vol)
(Voh)
0 . 9 5
5nS
45% ~ 55%
10%Vdd
90%Vdd Min
15pF
±1.0PPM
10mS
R e c om m e nde d
S olde r P a d L a y out
output Load
Aging per year
Startup Time
Disable Time
Enable Time
(Cl)
(Ts)
0 . 9 5
250nS
10mS
Phase Noise @ 10kHz offset
Reflow Soldering Temp
Moisture Sensitivity Level (MSL)
Termination Finish
-140dBc/Hz Typical
260ºC / 10 Seconds
1
0 . 8
# 4
# 3
# 2
0 . 6 5
Au
# 1
• INPUT CURRENT (Idd) (mA Max)
0 . 9
10+ ~ 20MHz 20+ ~ 30MHz 30+ ~ 40MHz 40+ ~ 54MHz
4 ~ 10MHz
2.5V
2.8V
3.3V
4.2
4.7
5.5
5.5
6.0
7.0
4.6
5.2
6.0
3.1
3.4
4.0
3.7
4.1
4.8
All dimensions are in millimeters.
P in C onne c tions
• STANDARD FREQUENCIES1
# 1 E /D
# 3 O utput
12.000MHz
24.000MHz
44.000MHz
5.000MHz
16.000MHz
32.000MHz
10.000MHz
20.000MHz
40.000MHz
# 2 G N D
# 4 V DD
• ENABLE / DISABLE FUNCTION
1 Does not imply a stocked part.
OUTPUT (Pin 3)
(Pin 1)
2 An internal pullup resistor from pin 1 to pin 4 allows active output if pin 1 is left open.
Dimensional drawing is for reference to critical specifications defined by size measurements.
Certain non-critical visual attributes, such as side castellations, reference pin shape etc. may
vary. All specifications are subject to change without notice
OPEN 2
ACTIVE
ACTIVE
High Z
'1' Level Vih ≥ 70%Vdd
'0' Level Vil ≤ 30%Vdd
FOXElectronics 5570 Enterprise Parkway Fort Myers, Florida 33905 USA +1.239.693.0099 FAX +1.239.693.1554 www.foxonline.com
EMEA Tel: +44 .1283.568153 | Canada +1.888.438.2369 | Asia Hong Kong Tel: +852.2854.4285 | Japan Tel: +81.3.3374.2079
© 2013 FOX ELECTRONICS | An Integrated Device Technology, Inc. company | ISO9001:2008 Certified
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