FREQUENCY CONTROL PRODUCTS
SURFACE MOUNT MINIATURE TCXO
TYPES DFA S7-K (5 V) & DFA S7-L (3.3 V)
19.9± 0.1
RECOMMENDED FOR NEW DESIGNS
12.9± 0.2
7.62
SURFACE MOUNTABLE PACKAGE
5 V OR 3.3 V SUPPLY VOLTAGE
1.27
1.6
18.4
1.2
Pot in
VERY HIGH STABILITY
Function
NC/Pot in/Vco
GND
Output
Vcc
H± 0.15
INTERNAL ADJUSTMENT
Option Y
DFA S7
1
2
3
4
10k
4
7.6
1.3
19.0
G
nd
3
PC board footprint
1
2.6
2
H = 7.80 mm
TYPE
Frequency Range
DFA S7-KH
2 to 52 MHz
DFA S7-KO
2 to 52 MHz
DFA S7-LH
2 to 39 MHz
DFA S7-LO
2 to 39 MHz
ELECTRICAL SPECIFICATIONS
supply voltage
supply current ( no load)
≤
25 MHz
≤
35 MHz
> 35 MHz
5V±5%
5V±5%
3.2 V to 3.6 V
3.2 V to 3.6 V
≤
10 mA
≤
5 mA
≤
5 mA
≤
5 mA
≤
20 mA
≤
20 mA
≤
15 mA
≤
15 mA
≤
30 mA
≤
30 mA
≤
20 mA
≤
20 mA
HCMOS 15 pF
clipped sine
HCMOS 15 pF
clipped sine
or 2 TTL
or 1 TTL
20kΩ//5 pF
20kΩ//5 pF
≤
45/55...55/45 %
≤
45/55...55/45 %
≤
10 ns
≤
10 ns
≥
3.5 V/
≤
0.5 V
≥
2 V p-p
≥
2.7 V/
≤
0.2 V
≥
1.5 V p-p
≤
10 ms @ 4.75V
≤
10 ms @ 4.75V
≤
10 ms @ 3.2V
≤
10 ms @ 3.2V
duty cycle for frequencies > 30 MHz is 40/60%…60/40%
output load
duty cycle @ 2.5V (LH @ 1.65 V)
rise/fall times (10 to 90 %)
high/low levels or output amplitude
start-up
remarks
FREQUENCY STABILITY
type
temperature
range
-10 to 60°C
-20 to 70°C
-30 to 75°C
DFA S7-K
types
remarks
-40 to 85°C
model
code
D1
C1
C2
N2
E5
E3
E2
temperature
≤
±1
≤
±1
≤
±2
≤
±2
≤
±5
≤
±3
≤
±2
detailed tolerances [ ppm ]
stability versus :
Vcc range
load ± 10 %
≤
± 0.1
≤
± 0.1
ageing
≤
±1
all types
≤
± 0.1
≤
± 0.1
≤
±1
factory calibration if no trimming option
≤
± 1 ppm
st
ageing is 1 year at 25°C
DFA S7-L : Vcc range
≤ ±
0.3 ppm ( f
≥
30 MHz )
OPTIONS
external voltage control
internal trimmer
external potentiometer
CODE
V
A
Y
DFA S7-K : 2.5 V ± 2 V
≥
± 5 ppm, positive slope
DFA S7-L : 1.5 V ± 1.5 V
≥
± 5 ppm, positive slope
≥
± 5 ppm
10 kΩ
≥
± 5 ppm, between pin 1 and GND (not available with internal trimmer)
ORDERING CODE
Example
type + option code + frequency + model code
DFA S7-KH 16.384 MHz E2
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