FREQUENCY CONTROL PRODUCTS
SURFACE MOUNT TCXO
DFA S4-KHZ (5 V) & DFA S4-LHZ (3.3 V)
2.5
KEY FEATURES
5 to 52 MHz
Tight stability
Analogue temperature compensation
2.5
20.0
20.0
APPLICATIONS
SDH/Sonet/Microwave
Function
NC
E/D
Vcc
Output
GND
7.4±0.2
DFA S4
1
2
3
4
5
1
8.9
0.8
25.4±0.2
22.2±0.5
23.6
5
17.8
PC board footprint
2
8.9
3.0
3
4.0
4
TYPE
Frequency Range
DFA S4-KHZ
5 to 52 MHz
DFA S4-LHZ
ELECTRICAL SPECIFICATIONS
supply voltage
supply current ( no load)
output load
duty cycle @ 50% level
rise/fall times (10 to 90 %)
high/low levels or output amplitude
start-up
tri-state control on pin 2
5V ±5%
≤
20 mA
HCMOS 15 pF or 2 TTL
45/55...55/45 %
≤
5 ns
≥
4.5 V/
≤
0.5 V
≤
10 ms @ 4.75 V
high or open = enable, low = high Z
3.3 V ± 5 %
≤
10 mA
HCMOS 15 pF or 2 TTL
45/55...55/45 %
≤
5 ns
≥
2.8 V/
≤
0.3 V
≤
10 ms @ 3.15 V
high or open = enable, low = high Z
FREQUENCY STABILITY
type
temperature
range
0 to 70°C
-20 to 70°C
-40 to 85°C
-40 to 85°C
model
code
B0.5
C0.5
E0.5
E1
temperature
≤
± 0.5
≤
± 0.5
≤
± 0.5
≤
± 1.0
detailed tolerances [ ppm ]
stability versus:
Vcc ± 5 %
load ± 10 %
≤
± 0.1
≤
± 0.1
ageing is 1
st
year at 25°C
ageing
≤
±1
calibration
@ 25°C
≤
±1
all types
remark
OPTIONS
voltage control on pin 1
(positive slope )
CODE
V
≥
± 5 ppm,
≤ ±
15 ppm
2.5 V ± 2 V
≥
± 5 ppm,
≤ ±
15 ppm
1.65 V ± 1.35 V
ORDERING CODE
Example
type + option code + frequency + model code
DFA S4-KHZV 19.44 MHz E0.5
TYPE
DFA S4-KHZ/LHZ
REVISION
00
CHECKED
NE
DATE
09.02.2006
PAGE
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