Low Jitter Frequency Translator
FX-500
FX-500
Description
The FX-500 is a complete crystal-based frequency translator used in communications applications where low jitter is paramount.
Performance advantages include superior jitter performance, high output frequencies and small package size. Advanced custom
ASIC technology results in a highly robust, reliable and predictable device.
The device is packaged in a 6 pin J-Lead ceramic package with a hermetic seam welded lid.
Features
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Complete Frequency Translator to 77.760 MHz
3.3 Volt or 5.0 Volt Supply
Capable of locking to an 8kHz pulse/ BITS clock
Tri-State Output allows board test
Lock Detect
J-lead Ceramic Package
Advanced Custom ASIC Technology
Absolute Pull Range Performance to ±100 ppm
CMOS output
Commercial or Industrial Temperature Range
EIA Compatible Tape and Reel Packaging
RoHS Compliant
*
Applications
•
Frequency Translation, Clock Smoothing
•
Telecom - SONET/SDH/ATM
•
Datacom - DSLAM, DSLAR, Access Nodes
•
Cable Modem Head End
•
Base Station - GSM, CDMA
*
( Except parts with Sn-Pb Solder Coated Option )
Block Diagram
VCC
(6)
FIN
(1)
LD
(5)
Tri-State
(2)
Loop Filter
VCXO
FOUT
(4)
÷
Phase
Detector
& LD
÷
GND
(3)
Figure 1. Functional block diagram
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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Performance Specifications
Table 1. Electrical Performance
Parameter
Frequency
Input Frequency
Capture Range (Ordering Option)
Output Frequency
Supply
1
Voltage (Ordering Option)
Current (No Load)
Input Signal
Input Low Level Voltage
Input High Level Voltage
Pulse Width
Output
2
Output High Level Voltage
Ouput Low Level Voltage
Rise Time
Fall Time
Duty Cycle
3
≤
60 MHz
> 60MHz
Leakage Current of Input
Loop Bandwidth (-3dB), 8kHz input
Jitter, 8kHz to 77.76MHz
rms
p-p
Symbol
F
IN
APR
F
OUT
V
DD
V
DD
I
DD
V
IL
V
IH
Min
0.001
±50
1.0
3.0
4.5
Typical
Maximum
77.76
±100
77.76
Units
MHz
ppm
MHz
V
V
mA
V
V
ns
V
V
ns
ns
%
%
μA
Hz
ps
ps
UI
3.3
5.0
3.6
5.5
40
0.3*V
DD
0.7*V
DD
6
0.9*V
DD
1.8
1.8
45
40
-1
10
4.7
44
0.003
V
OH
V
OL
t
R
t
F
D
0.1*V
DD
3.0
3.0
55
60
1
I
C
BW
1. A 0.1 μF low frequency tantalum bypass capacitor in parallel with a 0.01 μF high frequency ceramic capacitor is recommended.
2. Figure 2 defines the waveform parameters. Figure 3 illustrates the standard test conditions under which these parameters are specified and
tested.
3. Duty cycle is defined as (on time÷period), with VS = VDD/2, per figure 2. Duty cycle is measured with a 15pf load per figure 3.
4. Other frequencies may be available, please contact factory.
Figure 2. Output Waveform
Figure 3. Output Test Conditions (25 ± 50C )
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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Absolute Maximum Ratings
Stresses in excess of the absolute maximum ratings can permanently damage the device. Functional operation is not implied at
these or any other conditions in excess of conditions represented in the operational sections of this data sheet. Exposure to the
maximum ratings for the extended periods may adversely affect device reliability.
Table 2. Absolute Maximum Ratings
Parameter
Symbol
Ratings
Unit
Power Supply
Storage Temperature
V
DD
T
STR
7
-55 to 125
V
0C
Reliability
The FX-500 is capable of meeting the following qualification tests
Table 3. Environmental Compliance
Parameter
Conditions
Mechanical Shock
Mechanical Vibration
Lead Solderability
Gross and Fine Leak
MIL-STD-883, M2002/TEST A
MIL-STD-883, M2007/TESTA
MIL-STD-883, M2003
MIL-STD-883, M1014
Handling Precautions
Although ESD protection circuitrry has been designed into the the FX-424, proper precautions should be taken when handling
and mounting. VI employs a human body model and a charged-device model (CDM) for ESD susceptibility testing and design
protection evaluation. ESD thresholds are dependent on the circuit parameters used to define the model. Although no industry
wide standard has been adopted for the CDM, a standard HBM of resistance=1.5Kohms and capacitance = 100pF is widely used
and therefore can be used for comparison purposes
Table 4. Predicted ESD Ratings
Model
Human Body Model
Charged Device Model
Minimum
1000 V
1000 V
Conditions
MIL-STD 883, Method 3015
JEDEC, JESD22-C101
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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Table 5. Reflow Profile (IPC/JEDEC J-STD-020C)
Parameter
PreHeat Time
Ramp Up
Time Above 217 0C
Time To Peak Temperature
Time At 260 0C
Ramp Down
Symbol
t
S
R
UP
t
L
t
AMB-P
t
P
R
DN
Value
60 sec Min, 180 sec Max
3 0C/sec Max
60 sec Min, 150 sec Max
480 sec Max
20 sec Min, 40 sec Max
6 0C/sec Max
The device has been qualified to meet the JEDEC
standard for Pb-Free assembly. The temperatures
and time intervals listed are based on the Pb-
Free small body requirements. The temperatures
refer to the topside of the package, measured on
the package body surface. The FX-500 device is
hermetically sealed so an aqueous wash is not an
issue.
Figure 4. Suggested IR Profile
Table 6. Tape and Reel Information
Tape Dimensions (mm)
A
24
B
11.5
C
1.5
D
4
E
12
F
1.78
G
21
Reel Dimensions (mm)
H
13
I
100
J
5
K
25
L
330
#/Reel
200
Figure 5. Tape and Reel
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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FX500 YWW
CCC-CCCC
XX-XX
Y = Year
WW = Week
C = Option Codes
XX = FREQUENCY CODE
(SEE ORDERING INFO)
Inch
[mm]
Figure 6. Outline Drawing and Pad Layout
Table 7. Pin Functions
Pin #
1
2
3
4
5
6
Symbol
f
IN
Tri-State
!
GND
f
o
LD
2
V
DD
Function
Input Frequency
Logic Low = Output Disable
LOgic High = Output Enabled
Case and Electrical Ground
Output Frequiency
Lock Detect
Power Supply Voltage
1. Tristate is driven to logic high or logic low; there is no internal pull up or pull down resistor.
2. LD is an open collector output requiring a 30k ohm pullup resistor to VDD. LD output is logic high under locked condition,
logic low for no input at fIN, and for “out-of-lock” condition LD transitions between logic low and logic high at the phase detector
Vectron International • 267 Lowell Road, Unit 102, Hudson, NH 03051 • Tel: 1-88-VECTRON-1 • http://www.vectron.com
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