Miniature OCXO
FEATURES
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Industry Standard 9x14mm SMT Footprint
3.3V or 5.0V operation
Commercial or Industrial temperature range
LVCMOS output
Low Phase Noise
Tape & Reel Packaging
Electrical Frequency Adjustment Option
Fully compliant to RoHS Directive 2002/95/EC
9x14mm
DESCRIPTION
The CTS model 1914 is a low cost, small size,
high performance SMT OCXO.
Patent Pending.
APPLICATIONS:
Test and Measurement
Telecommunications
Wireless Base Stations
ELECTRICAL SPECIFICATIONS
Parameter
Operating Conditions
Operating Temperature Range
Supply Voltage
Supply Power:
Warm-Up:
Steady State:
Output Load
T
OP
Option L:
Option H:
3.3 V
5.0 V
Conditions & Remarks
Min
-40
3.135
4.75
-
-
5
Typical
-
3.300
5.0
-
-
-
Max
+85
3.465
5.25
2.4
0.7
15
Unit
°
C
Vdc
P
max
P
SS
@ +25° (still air)
C
W
W
pF
Frequency Stability
Standard Frequencies
(Consult factory for different
frequencies)
Initial Frequency Tolerance
Freq. vs Temperature (pk-pk)
Freq. vs Supply Voltage
Freq. vs Load
Freq. vs Time (Aging)
(Specifications noted apply for 3.3V supply and at +25° (still air) unless otherwise noted)
C
10, 12.8, 16.384,
f
NOM
10
25
19.2, 19.44, 20,
22, 25
@ 25° , at time of shipment
C
Option A:
Option B:
V
CC
± 5%
For ± 5% change
per day (after 30 days)
15 years
Standard: All causes, 24hrs
Available Option: (@ Constant voltage)
+30 to +50° for 24 hrs
C
+30 to +50° for 5 days
C
0 to +70° for 14 days
C
0° to +70°
C
C
-40°C to +85°
C
-
-
-
-
-
-
-
-
-
-
-
± 0.100
-
-
± 0.030
± 0.005
± 0.005
± 2.500
-
-
-
-
± 0.200
0.100
0.280
-
-
-
-
0.370
0.040
0.100
0.250
MHz
ppm
ppm
ppm
ppm
ppm
ppm
ppm
ppm
Holdover Stability (pk-pk)
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Miniature OCXO
9x14mm
Parameter
Total Free-Running Accuracy
Short Term Frequency Stability
Warm-Up Time
Conditions & Remarks
all causes for 15 years ( f/f
NOM
)
Allan Deviation
@ 1.0 sec tau
@ 25° to within 100 ppb of final
C,
frequency
Min
-
-
-
Typical
-
0.3
2
Max
± 4.600
0.5
5
Unit
ppm
ppb
minutes
Output Parameters
Output Signal
Amplitude
Rise/Fall Times
Duty Cycle
Spurious
Non and Sub-harmonics
10Hz
Phase Noise
(Typical @ 10 Mhz)
100Hz
1kHz
10kHz
100kHz
20% to 80% @ 15pf load
@ 50% of output waveform
V
OL
V
OH
-
90% V
CC
-
45
-
-
-
-
-
-
-
0.3
0.5
±9.6
Positive, monotonic
Z
IN
-
-
-
V
IO
V
IH
V
IL
Pin 2 OPEN, Output Enabled
Pin 2 Logic '1', Output Enabled
Pin 2 Logic '0', Disabled, High Z
0.7*Vcc
-
-
-
-
0.3*Vcc
V
V
LVCMOS Square Wave
-
-
-
50
-
-
-95
-125
-145
-154
-154
1.65
2.5
-
-
1.0
-
10% V
CC
-
3
55
-80
-100
-80
-115
-135
-145
-145
3.0
4.5
-
-
-
10
M ohms
%
Vdc
ns
%
dBc
dBc
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
dBc/Hz
Electronic Frequency Adjustment (Option V)
EFC Control Voltage
Frequency Adjust Range (Std)
Slope
Input Impedance
Linearity
Enable Function
Enable Input Voltage
Disable Input Voltage
V
C
Standard
Available Option
volts
ppm
Model 1914 Standard Options
Frequency in MHz
1914
Supply Voltage
L = +3.3Vdc
H = +5.0Vdc
Oper. Temp. Range
A = 0 to +70 C
B = -40 to +85 C
___.________
Example: 1914LBF20.0000
Electronic Freq. Control
F = Fixed - No Adjust
V = Elect. Freq. Adjust
-
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Miniature OCXO
MECHANICAL SPECIFICATIONS
PACKAGE DRAWING
14.30±0.50
[.563±0.020]
PAD 6
PAD 5
PAD 4
9x14mm
XXMXXX
CTS
YYWW
Pat. Pend.
PAD
1
2
3
4
5
6
CONNECTION
EFC or DO NOT CONNECT
ENABLE
GROUND
OUTPUT
N/C
SUPPLY VOLTAGE - VCC
9.30±0.50
[.366±0.020]
ENABLE TRUTH TABLE
PIN 2
PIN 4
LOGIC '1'
ENABLED
OPEN
ENABLED
LOGIC '0'
High Z
PAD 1
PAD 2
PAD 1 MARK
PAD 3
6.92±0.50
[.272±0.020]
PAD 1
PAD 2
PAD 3
1.02
TYP
[.040]
6.76
[.266]
RECESSED C'BORE HOLES,
MAY CONTAIN EXPOSED
ELECTRICAL CONNECTIONS
FOR CTS USE ONLY.
(10) PLACES
PAD 6
PAD 5
PAD 4
2.54
[.100]
5.08
[.200]
RECESSED CAVITY
ALL DIMENSIONS ARE IN MM [INCHES]
ALL DIMENSIONS ARE NOMINAL UNLESS OTHERWISE SPECIFIED.
LEAD TERMINATION FINISH: GOLD FLASH, <10 MICRO INCH, OVER Ni PLATED Cu.
.
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Miniature OCXO
MECHANICAL SPECIFICATIONS (Continued)
SUGGESTED SOLDER PAD GEOMETRY
9x14mm
5.08
[.200]
2.54
[.100]
1.27 TYP
[.050]
6.50 10.06
[.256] [.396]
ALL DIMENSIONS ARE IN MM [INCHES].
ALL DIMENSIONS ARE NOMINAL.
MAXIMUM SOLDERING PROFILE
Temperature
>217°
C
Time
2.5min
Note: Part is not designed to be reflowed in an inverted position.
♦
Fully compliant to RoHS Directive 2002/95/EC
♦
Co-Planarity (from seating plane): max. 0.1mm
♦
MSL: level 1
♦
Device quantity is 500 pcs maximum per 330 mm reel
260° (Absolute max temperature)
C
10 sec
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Miniature OCXO
9x14mm
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Device quantity is 500 pcs maximum per 330 mm reel
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