FREQUENCY CONTROL PRODUCTS
SURFACE MOUNT PRECISION TCXO
DFA S7-K (5 V) & DFA S7-L (3.3 V)
KEY FEATURES
7.62
1.27
19.9±0.1
2 to 52 MHz
Tight stability
Analogue temperature compensation
12.9±0.2
1.6
18.4
Pot in
10k
1.2
APPLICATIONS
SDH/Sonet/Microwave
Function
NC/Pot in/Vco
GND
Output
Vcc
H = 7.80 mm
H±0.15
Gnd
19.0
DFA S7
1
2
3
4
4
7.6
1.3
3
1
2.6
2
Option Y
PC board footprint
TYPE
Frequency Range
DFA S7-KH
2 to 52 MHz
5V±5%
≤
10 mA
≤
20 mA
≤
30 mA
DFA S7-KO
2 to 52 MHz
5V±5%
≤
5 mA
≤
20 mA
≤
30 mA
DFA S7-LH
2 to 45 MHz
3.2 V to 3.6 V
≤
5 mA
≤
15 mA
≤
20 mA
DFA S7-LO
2 to 45 MHz
3.2 V to 3.6 V
≤
5 mA
≤
15 mA
≤
20 mA
ELECTRICAL SPECIFICATIONS
supply voltage
supply current ( no load)
≤
25 MHz
≤
35 MHz
> 35 MHz
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
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%
FREQUENCY STABILITY
type
temperature
model
range
code
-10 to 60°C D1
C1
-20 to 70°C
C2
-30 to 75°C N2
E5
-40 to 85°C 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
DFA S7-K
types
remarks
≤
± 0.1
≤
± 0.1
≤
±1
factory calibration if no trimming option
≤
± 1 ppm
ageing is 1
st
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
DFA S7-K/L
REVISION
02
type + option code + frequency + model code
DFA S7-KH 16.384 MHz E2
CHECKED
NE
DATE
11.10.2002
PAGE
59
FREQUENCY CONTROL PRODUCTS
SURFACE MOUNT PRECISION TCXO
DFA S7-KHZ (5 V) & DFA S7-LHZ (3.3 V)
KEY FEATURES
12.9±0.2
7.62
1.27
19.9±0.1
2 to 52 MHz
Tri-state function
Analogue temperature compensation
Pot in
1.6
18.4
10k
H±0.15
APPLICATIONS
SDH/Sonet/Microwave
Function
NC / Pot in / Vco
GND
N/C
Output
Vcc
E/D
H = 7.80 mm
1.2
Gnd
19.0
DFA S7
1
2
3
4
5
6
5
7.62
1.3
6
1
2.6
Option Y
4
3
2
PC board footprint
TYPE
Frequency Range
DFA S7-KHZ
2 to 52 MHz
5V±5%
≤
25 MHz
≤
35 MHz
> 35 MHz
≤
20 mA
≤
30 mA
≤
40 mA
DFA S7-LHZ
2 to 45 MHz
3.3 V ± 5 %
≤
10 mA
≤
15 mA
≤
20 mA
ELECTRICAL SPECIFICATIONS
supply voltage
supply current ( no load)
output load
duty cycle @ 2.5V (LH @ 1.65 V)
rise/fall times (10 to 90 %)
high/low levels or output amplitude
start-up
tri-state control on pin 6
remark
HCMOS 15 pF
HCMOS 15 pF
or 2 TTL
or 1 TTL
≤
45/55...55/45 %
≤
45/55...55/45 %
≤
10 ns
≤
10 ns
≥
3.5 V/
≤
0.5 V
≥
2.7 V/
≤
0.2 V
≤
10 ms @ 4.75V
≤
10 ms @ 3.15V
high or open = enable, low = high Z
high or open = enable, low = high Z
duty cycle for frequencies > 30 MHz is 40/60%…60/40%
FREQUENCY STABILITY
type
temperature
model
range
code
-10 to 60°C D1
C1
-20 to 70°C
C2
-30 to 75°C N2
-40 to 85°C E3
temperature
≤
±1
≤
±1
≤
±2
≤
±2
≤
±3
detailed tolerances [ ppm ]
stability versus:
Vcc range
load ± 10 %
≤
± 0.1
≤
± 0.1
ageing
≤
±1
≤
±1
all types
DFA S7-K type
remarks
≤
± 0.1
≤
± 0.1
factory calibration if no trimming option
≤
± 1 ppm
ageing is 1
st
year at 25°C
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
DFA S7-KHZ/LHZ
REVISION
02
type + option code + frequency + model code
DFA S7-KHZ 16.384 MHz E3
CHECKED
NE
DATE
11.10.2002
PAGE
58
Analog electronics
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