VSS4 series
3.3 Volt Spread Spectrum CMOS Oscillator
Features
•
CMOS output
•
Output frequencies to 168 MHz
•
Tri-state output for board test and debug
•
-10/70 or –40/85
°C
operating temperature
•
Gold over nickel contact pads
•
Hermetically sealed ceramic SMD package
•
Product is compliant to RoHS directive
and fully compatible with lead free assembly
The VSS4 Spread Spectrum Crystal Oscillator
Applications
•
Printers, Copiers, Scanners
•
Cable Modems, Set Top Box
•
DVD, Blue Ray Disc players
•
Computer Peripherals, CPU, Graphic Cards
•
LCD Displays
•
GPS
•
Video Surveillance
•
Games
Description
Vectron’s VSS4 Crystal Oscillator (XO) is quartz
stabilized square wave generator with a CMOS
output incorporating spread spectrum
technology, operating off a 3.3 volt supply.
.
Vectron International 267 Lowell Road, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VSS4 Data Sheet
Performance Characteristics
Table 1. Electrical Performance
Parameter
Frequency
Operating Supply Voltage
1
Absolute Maximum Operating Voltage
Supply Current, Output Enabled
12.00 to 27.999 MHz
28 to 79.999 MHz
80 to 168 MHz
Supply Current, Output disabled
Output Logic Levels
Output Logic High
2
Output Logic Low
2
Output Logic High Drive
Output Logic Low Drive
Output Rise/Fall Time
2
Duty Cycle
3
Operating Temperature (ordering
option)
Storage Temperature
Stability
4
(ordering
option)
Spread, Center or Down (ordering
option)
Cycle-Cycle Jitter, F
OUT
<=19.999MHz
F
OUT
>20MHz
Output Enable/Disable
5
Output Enabled
Output Disabled
Internal Enable Pull-Up resistor
5
Start-up time
Symbol
f
O
V
DD
I
DD
13
15
30
50
0.9*V
DD
0.1*V
DD
8
8
5
40
-10/70 or –40/85
-40
±50, ±100
±0.5,±1,±2,±4
200
100
2.64
0.66
25
10
Kohm
ms
85
60
Min
12
3.135
-0.5
Typical
3.3
Maximum
168
3.465
4.0
Units
MHz
V
V
mA
I
DD
V
OH
V
OL
I
OH
I
OL
t
R/
t
F
SYM
uA
V
V
mA
mA
ns
%
°C
°C
ppm
%
ps
V
1. A 0.01uF and a 0.1uF capacitor should be located as close to the supply as possible (to ground) is recommended.
2. Figure 3 defines these parameters. Figure 4 illustrates the operating conditions under which these parameters are tested and
specified. For Fo>90MHz, rise and fall time is measured 20 to 80%.
3. Symmetry is measured defined as On Time/Period.
4. Includes calibration tolerance, operating temperature, supply voltage variations, aging and shock and vibration (not under
operation).
5. Output will be enabled if enable/disable is left open.
t
R
t
F
I
DD
4
V
DD
V
OH
50%
V
OL
On Time
Period
+
-
.
1μF
.01μF
I
C
V
C
1
+
-
2
3
15pF
Figure 2. Output Waveform
Figure 3. Typical Output Test Conditions (25±5°C)
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VSS4 Data Sheet
Enable/Disable Functional Description
Under normal operation the Enable/Disable is left open or set to a logic high state. When the E/D is set to
a logic low, the oscillator stops and the output is in a high impedance state. This helps reduce power
consumption as well as facilitating board testing and troubleshooting.
Table 2. Outline Diagrams, Pad Layout and Pin Out
Pin #
Symbol
Function
1
E/D
Enable/Disable
2
GND
Electrical and Case Ground
3
f
O
Output Frequency
4
V
DD
Supply Voltage
5.0±0.2
1.05±0.1
Frequency
Date Code
1.6
0.7
2.6
1.1
Suggested Layout
1.6
1.0
2.6
1.3
Devices will be marked with pin 1, frequency and date code
Contact Pads are gold over nickel
Figure 3, Package drawing
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VSS4 Data Sheet
Tape and Reel
Table 3: Tape and Reel Dimensions (mm)
Tape Dimensions
Reel Dimensions
# Per
Product
VSS4
A
12
B
5.5
C
1.55
D
4
E
8
F
2.2
G
20
H
13
I
62
J
2.2
K
12.4
L
180
Reel
1000
J
F
D
A
E
C
G
B
L
I
H
K
Reliability
The VSS4 qualification testing will include:
Table 4. Environnemental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Solderability
Gross and Fine Leak
Resistance to Solvents
Moisture Sensitivity Level
Conditions
MIL-STD-883 Method 2002
MIL-STD-883 Method 2007
MIL-STD-883 Method 1010
MIL-STD-883 Method 2003
MIL-STD-883 Method 1014
MIL-STD-883 Method 2015
MSL1
Handling Precautions
Although ESD protection circuitry has been designed into the the VSS4, 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 5. ESD Ratings
Model
Human Body Model
Charged Device Model
Minimum
1000
500
Conditions
MIL-STD-883 Method 3115
JESD 22-C101
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
VSS4 Data Sheet
Suggested IR profile
Devices are built using lead free epoxy and can be subjected to standard lead free IR reflow conditions,
Table 6 shows max temperatures and lower temperatures can also be used e.g. peak temperature of
220C.
Table 6. Reflow Profile (IPC/JEDEC J-STD-020CurrentRev)
Parameter
Symbol
o
Time At 260 C (max)
T1/t
1
Time At 225 °C (max)
T2/t
2
Ramp Down
R
DN
Value
10 sec Max
60 sec Max
6
o
C/sec Max
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
MEMS传感器
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