Data Sheet

VFJA910
25MHz Jitter Attenuator
Dual LVCMOS Output
Features






RoHS Status
2 LVCMOS outputs
Ultra Low Jitter 0.20ps RMS
Phase Noise: -140 dBc/Hz @ 1kHz
Low Power: < 120mW typical
Free-run mode
No external components required
Applications

Synchronous Ethernet
Description
The VFJA910 is a Jitter Attenuator that provides two LVCMOS outputs with a frequency of 25MHz. With less
than 0.4 dBc of jitter peaking the device allows for cascading multiple stages within the network. A select input
[Sel] allows the user to switch from the external input reference to a free-run mode. In free-run mode the device
outputs a 25MHz clock that is not locked to the input reference frequency. Operating with a +3.3 volt power
supply the device typically consumes 120mW. The VFJA910 is available in a 15.0mm x 13.0mm surface mount
package.
Filter
FOUT 1
FIN
R-Divider
VCXO
PFD
FOUT 2
Sel
N- Divider
Block Diagram
North America: +1-800-757-6686 • International: +1-508-435-6831 • Asia: +65-655-17551 • www.ctscorp.com
Specifications are subject to change without notice.
1
Rev_1014
VFJA910
25MHz Jitter Attenuator
Dual LVCMOS Output
Absolute Maximum Ratings
Parameter
Supply Break
Down Voltage
Storage
Temperature
Symbol
Condition
Min
Typ
Max
Unit
VCC
-0.5
5.5
V
TS
-55
+105
C
Note
Electrical Specifications
Parameter
Output
Frequency
Range
Input
Frequency
Range
Input Level
Output Level
Logic “1”
Output Level
Logic “0”
Jitter RMS
Symbol
SSB Phase
Noise
Фn
APR
Free-run
Accuracy
Modulation
BW
Duty Cycle
Rise / Fall
Time
Start up time
Select Input
Supply
Voltage
Input Current
Operating
Temperature
Range
Condition
Min
FOUT
Typ
Max
25.0
Unit
MHz
FIN
Slew Rate 2.5V / ns
(min)
VIN
AC coupled internally
0.4
3.3
V P-P
VOH
IOH = 8 mA
VCC-0.1
VCC
V
VOL
IOL = 8 mA
0.0
0.3
V
300
ƒs
MHz
25.0
12kHz to 20MHz
100Hz
1kHz
10kHz
100kHz
1MHz
200
-102
-131
-149
-153
-160
dBc/Hz
 100
-40ºC to +85ºC
60
TR/TF
Sel
VCC
45
ppm
50
55
%
0.6
ns
2
10
ms
Logic “1” = Free Run Mode
Logic “0” = External Input Reference
ICC
TA
Hz
20% to 80%
3.15
3.30
30
-40
@ 25 MHz
ppm
30
@ 50%
Note
3.45
V
40
mA
+85
C
Note 1
LVCMOS
North America: +1-800-757-6686 • International: +1-508-435-6831 • Asia: +65-655-17551 • www.ctscorp.com
Specifications are subject to change without notice.
2
Rev_1014
VFJA910
25MHz Jitter Attenuator
Dual LVCMOS Output
Environmental and Mechanical Conditions
Parameter
Mechanical Shock
Thermal Shock
Condition
Per MIL-STD-202, Method 213, Condition E
Per MIL-STD-883, Method 1011, Condition A
Vibration
Per MIL-STD-883, Method 2007, Condition A
Soldering Conditions
260C for 10s max
-8
Leak rate less than 5x10 atm.cc/s of helium (crystal only)
Hermetic Seal
Mechanical Outline
Connection Diagram
VCC = +3.3V
0.1 uF
9 4
0.1 uF
FIN
1
7
FOUT 1
Sel
3
6
FOUT 2
5 10
Gnd
Pin #
1
2
3
4
5
6
7
8
9
10
Description
Fin
N/C
Sel
VCC
Gnd
FOUT 2
FOUT 1
N/C
VCC
Gnd
Table 1
Sel
0
1
Input Frequency
(MHz)
25.00 MHz
Free-run Mode
Output Frequency
(MHz)
25.00
25.00
North America: +1-800-757-6686 • International: +1-508-435-6831 • Asia: +65-655-17551 • www.ctscorp.com
Specifications are subject to change without notice.
3
Rev_1014
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