FREQUENCY CONTROL PRODUCTS
STRATUM III & IIIE OCXO
TYPES DFO 20-KH (5 V) & DFO 20-LH (3.3 V)
FEATURES
10 to 25 MHz
20.3±0.1
20.3±0.1
7.62
7.62
Stratum IIIE compliant over -40 to 85°C
Stratum III compliant over -40 to 85°C
APPLICATIONS
Stratum III & Stratum IIIE
Function
Vcc
Output
GND
N.C.
N.C.
1
15.24
2
3
5
4
DFO 20
H
0.4±0.1
1
2
3
4
5
H = 11mm
5.1
0.45
TYPE
Frequency Range
Standard frequencies
DFO 20-KH
DFO 20-LH
10 to 25 MHz
12.8, 16.384, 19.44 20 & 25 MHz
ELECTRICAL SPECIFICATIONS
supply voltage
supply current (no load) @ 25°C
supply current during warm up
output load
duty cycle @ 2.5 V
rise & fall times (10 to 90%)
high/low levels
SSB phase noise (1 Hz BW)
(typical @ 12.8MHz)
@ 1 Hz
@ 10 Hz
@ 100 Hz
@ 1 kHz
5V±5%
≤
250 mA
≤
500 mA
HCMOS 15 pF or 2 TTL
40/60...60/40 %
≤
10 ns
≥
4.5 V/≤ 0.5 V
-95 dBc/Hz
-120 dBc/Hz
-140 dBc/Hz
-145 dBc/Hz
≤
5 min @ 25°C ref @ 1 hr frequency
3.3 V ± 5 %
≤
300 mA
≤
800 mA
HCMOS 15 pF or 2 TTL
40/60...60/40 %
≤
10 ns
≥
2.7 V/≤ 0.5 V
-95 dBc/Hz
-120 dBc/Hz
-140 dBc/Hz
-145 dBc/Hz
≤
5 min @ 25°C ref @ 1 hr frequency
warm up time to reach
≤
1 x 10E-7
FREQUENCY STABILITY
type
temperature
range
model
code
detailed tolerances after 30 days of operation
stability versus:
temperature Vcc ± 5 %
ageing
≤
± 0.28
ppm
≤
±1x
10E-8
≤
±1x
10E-8
≤
± 2.5 x
10E-9
≤
± 3.5
ppm/
15 years
≤
± 3.5
ppm/
15 years
overall
stability
≤
± 4.6
ppm/
15 years
≤
± 4.6
ppm/
15 years
Holdover
stability
≤
± 0.37
ppm
≤
± 12 x
10E-9
24 hrs
drift
≤
±4x
10E-8
≤
±1x
10E-9
calibration
@ 25°C
≤
±5x
10E-7
≤
±5x
10E-7
Telcordia GR-1244 CORE Stratum III/IIIE or ITU-T G.813 option 1
-20 to 70°C CS3
-40 to 85°C ES3
all types
0 to 70°C BS3E
-40 to 85°C ES3E
DEFINITIONS
24 hours drift
24 hours holdover mode
GR-1244-CORE
Over full temperature range and Vcc ± 1 % (CS3 & ES3), and Vcc ± 0.25 % (BS3E)
ORDERING CODE
Example
type + option code + frequency + model code + voltage value
DFO 20-LH 12.8 MHz BS3E
TYPE
DFO 20 SIII
REVISION
03
CHECKED
NE
DATE
.18.10.2007
PAGE
xx
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