FREQUENCY CONTROL PRODUCTS
STRATUM IIIE OCXO
TYPES DFO 236-MSH
FEATURES
4 to 20 MHz
26.2±0.2
8.9
36±0.2
25.4
Stratum IIIE compliant over 0 to 70°C
SC cut crystal
APPLICATIONS
Stratum IIIE
Function
NC
NC
Vcc
Output
GND
3
4
2
8.9
1
5
DFO 236-MSH
1
2
3
4
5
0.4±0.1
H±0.1
5
H = 17.0 mm
0.8
TYPE
Frequency Range
Standard frequencies
DFO 236-MSH
4 to 20 MHz
12.8, 16.384, 19.44 & 20 MHz
ELECTRICAL SPECIFICATIONS
supply voltage
supply power (no load) @ 25°C
supply power during warm up
output load
duty cycle @ 2.5 V
rise & fall times (10 to 90%)
high/low levels or output amplitude
SSB phase noise (1 Hz BW)
(typical @ 12.8MHz)
@ 1 Hz
@ 10 Hz
@ 100 Hz
@ 1 kHz
5V±5%
≤
1W
≤
5W
HCMOS 15 pF or 2 TTL
40/60...60/40 %
≤
15 ns
≥
3.5 V/≤ 0.5 V
-90 dBc/Hz
-120 dBc/Hz
-130 dBc/Hz
-135 dBc/Hz
≤
10 min
warm up time to reach
≤
1 x 10E-7
FREQUENCY STABILITY
type
temperature
range
model
code
detailed tolerances
stability versus:
temperature Vcc ± 5 %
ageing
≤
± 3.5
ppm
over
20 years
overall
stability
≤
± 4.6
ppm
over
20 years
Holdover
stability
24 hrs
drift
calibration
@ 25°C
Telcordia GR-1244 CORE Stratum IIIE
0 to 70°C BS3E
all types
-20 to 70°C CS3E
≤
±1x
10E-8
≤
±1x
10E-9
≤
± 12 x
10E-9
≤
±1x
10E-9
≤
±5x
10E-7
DEFINITIONS
24 hours drift
24 hours holdover mode
GR-1244-CORE
Over full temperature range and Vcc ± 1 %
ORDERING CODE
Example
type + option code + frequency + model code + voltage value
DFO 236-MSH 12.8 MHz CS3E
TYPE
DFO 236 SIIIE
REVISION
01
CHECKED
NE
DATE
10.10.2004
PAGE
15