VFJA1491C

`
VFJA1491C - PRELIMINARY
Jitter Attenuator / Clock Generator
Features





Frequency Range 10MHz to 200 MHz
14mm x 9mm Surface Mount Package
Dual LVCMOS Outputs
Low Jitter/Phase Noise
Tape and Reel Packaging
Applications
 Telecom Switching
 Wireless Communication
 Timing over Packet
Description
The VFJA1491P is a Jitter Attenuator which accepts an input reference clock up to 200 MHz and provides an
output frequency up to 200 MHz. The output frequency is determined by a VCXO designed for low phase noise.
The VFJA1491P is available in a 14 mm x 9 mm surface mount package.
Filter
Fout 1
F in
R-Divider
VCXO
PFD
Fout 2
EE Prom
N- Divider
Block Diagram
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-528
Rev A1115
`PRELIMINARY - VFJA1491C
Jitter Attenuator / Clock Generator
Electrical Specifications
Parameter
Symbol
Input Frequency
F in
Input Level
Output
Frequency
Output Voltage
Levels
Duty Cycle
Rise / Fall Times
F out
VOH
VOL
Tr/Tf
Lock Range
Modulation BW
Operating
Temperature
Range
Jitter
Conditions & Remarks
Min
Typical
Max
Unit
Slew Rate 1.0V/ns
10
-
200
MHz
DC coupled internally
0.4
3.3
Vp-p
10
200
MHz
V
V
RL = 10K Ω //10pF
.9 Vcc
Vcc
0
.1Vcc
@ 50% Vout (p-p)
20% to 80%
45
55
0.5
APR
MBW
SSB Output Phase
Noise
@
156.25 MHz
Ta
±20
ppm
10
Hz
-40
Фn
12kHz to 20 MHz
90
100 Hz offset
1K Hz offset
10K Hz offset
100K Hz offset
1M Hz offset
-104
-130
-147
-155
-159
Start up Time
Supply Voltage
Input Current
+3.15
+85
°C
100
fs
dBc/Hz
2
3
s
3.30
85
+3.45
100
V
mA
Logic “0” (< 0.5V or floating) Output Enabled
Logic”1” (> 2.2V) Output Disabled
Enable / Disable
Enable/Disable
Time
%
ns
LVCMOS
100
ns
Max
Unit
Absolute Maximum Ratings
Parameter
Supply Breakdown
Voltage
Storage Temperature
Conditions & Remarks
Min
Typical
Vcc
-0.5
+4.0
V
Ts
-50
+95
C
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-528
Rev A1115
`PRELIMINARY - VFJA1491C
Jitter Attenuator / Clock Generator
Mechanical and Environmental
Mechanical Shock
Thermal Shock
Vibration
Soldering Conditions
Hermetic Seal
Per MIL-STD-202, Method 213, Condition E
Per MIL-STD-883, Method 1011, Condition A
Per MIL-STD-883, Method 2007, Condition A
260C for 10s max
-8
Leak rate less than 5x10 atm.cc/s of helium (crystal only)
Phase Noise Performance @ Fout = 156.25 MHz
Notes:
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-528
Rev A1115
`PRELIMINARY - VFJA1491C
Jitter Attenuator / Clock Generator
Connection Diagram
Pin Assignments
Vcc = 3.3V
Disable
C1
.1uF
6
2
1
1000pF
4
Fout 1
5
Fout 2
3
Gnd
Pin #
Connection
1
2
Fin
Disable
3
4
5
Case, Gnd
Fout 1
Fout 2
6
Vcc
Mechanical Specifications
Marking
VFJA1491C
xxx.xxx MHz (Fout)
xxx.xxx MHz (Fin)
XXYY (Date)
75 South Street, Hopkinton, MA 01748 • 800-982-5737 • 508-435-6831 • FAX 508-435-528
Rev A1115