VCB2 series
3.3, 5.0 volt CMOS Oscillator
Features
•
CMOS output
•
Output frequencies to 160 MHz
•
Tri-state output for board test and debug
•
0/70 or –40/85
°C
operating temperature
•
Product is compliant to RoHS directive
and fully compatible with lead free assembly
The VCB2 Crystal Oscillator
Applications
•
SONET/SDH/DWDM
•
Ethernet, Gigabit Ethernet
•
Storage Area Network
•
Digital Video
•
Broadband Access
•
Microprocessors/DSP/FPGA
Description
f
o
Output
Buffer /
Disable
Vectron’s VCB2 Crystal Oscillator (XO) is quartz
stabilized square wave generator with a CMOS
output, operating off a 3.3 or 5.0 volt supply.
The VCB2 uses fundamental or 3
rd
overtone
crystals, for output frequencies < 80MHz,
resulting in low jitter performance, typically 0.5ps
rms in the 12 kHz to 20MHz band.
Vectron International 267 Lowell Road, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail: vectron@vectron.com
Performance Characteristics
Table 1. Electrical Performance, 5V option
Parameter
Symbol
Frequency
f
O
1
Operating Supply Voltage
V
DD
Absolute Maximum Supply Voltage
Supply Current, Output Enabled
I
DD
0.032768 to 2.0 MHz
2.01 to 30 MHz
30.01 to 50 MHz
50.01 to 160.00 MHz
Output Logic Levels
Output Logic High
2
V
OH
2
Output Logic Low
V
OL
Output Rise/Fall Time
0.032768 to 2.00 MHz
2.01 to 20.00 MHz
20.01 to 160.00 MHz
Duty Cycle
3
(ordering option)
Operating Temperature (ordering
option)
Storage Temperature
Stability
4
(ordering
option)
Output Enable/Disable
5
Output Enabled
Output Disabled
Start-up time
2
Min
0.032768
4.5
-0.7
Typical
5.0
Maximum
160.000
5.5
7.0
10
15
40
50
Units
MHz
V
V
mA
0.9*V
DD
0.1*V
DD
10
8
5
V
V
ns
t
R/
t
F
SYM
T
OP
T
STOR
∆F/T
E/D
40/60 or 45/55
0/70 or -40/85
-55
125
±20, ±25, ±32, ±50, ±100
4.0
%
°C
°C
ppm
V
T
SU
0.8
10
ms
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 1 defines these parameters. Figure 2 illustrates the operating conditions under which these parameters are tested and
specified.
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 1. Output Waveform
Figure 2. 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
VCB2 Data Sheet
Table 2. Electrical Performance, 3.3V option
Parameter
Symbol
Frequency
f
O
1
Operating Supply Voltage
V
DD
Absolute Maximum Operating Voltage
Supply Current, Output Enabled
I
DD
0.032786 to 2.0 MHz
2.01 to 30 MHz
30.01 to 50 MHz
50.01 to 160 MHz
Output Logic Levels
Output Logic High
2
V
OH
2
Output Logic Low
V
OL
2
Output Rise/Fall Time
t
R/
t
F
0.032768 to 2.00 MHz
2.01 to 20.00 MHz
20.01 to 160.00 MHz
Duty Cycle
3
(ordering option)
SYM
Operating Temperature (ordering
option)
T
OP
Storage Temperature
T
STOR
4
Stability (ordering
option)
∆F/T
5
Output Enable/Disable
E/D
Output Enabled
Output Disabled
Start-up time
T
SU
Min
0.032768
2.97
-0.5
Typical
3.3
Maximum
160.000
3.63
5.0
8
10
20
35
Units
MHz
V
V
mA
0.9*V
DD
0.1*V
DD
12
10
6
40/60 or 45/55
0/70 or –40/85
-55
125
±20, ±25, ±32, ±50, ±100
2.0
0.5
10
V
V
ns
%
°C
°C
ppm
V
ms
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
+
-
.
1
µ
F
.01
µ
F
I
C
V
C
1
2
3
15pF
+
-
Figure 3. Output Waveform
Figure 4. 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
VCB2 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.
Tri-state Functional Description
Under normal operation the tri-state is left open or set to a logic high state. When the tri-state is set to a
logic low, the oscillator remains active but the output buffer is in a high impedance state. This helps
facilitate board testing and troubleshooting.
Table 3. Outline Diagrams and Pin Out
Pin #
1
2
3
4
Symbol
E/D or NC
GND
f
O
V
DD
Function
Tri-state, Enable/Disable or NC
Electrical and Case Ground
Output Frequency
Supply Voltage
Figure 5, Package drawing
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail vectron@vectron.com
VCB2 Data Sheet
Reliability
The VCB2 qualification tests have included:
Table 4. Environnemental Compliance
Parameter
Mechanical Shock
Mechanical Vibration
Temperature Cycle
Gross and Fine Leak
Resistance to Solvents
MIL-STD-883
MIL-STD-883
MIL-STD-883
MIL-STD-883
MIL-STD-883
Conditions
Method 2022
Method 2007
Method 1010
Method 1014
Method 2015
Handling Precautions
Although ESD protection circuitry has been designed into the the VCB2, 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
1500
Conditions
MIL-STD-883 Method 3115
JESD 22-C101
Suggested IR profile
Devices are built using lead free epoxy and can also be subjected to standard lead free IR reflow
conditions, Table 6 shows max temperatures and lower temperatures. A peak temperature of 240°C
minimum should be used to reflow the lead solder.
Table 6. Reflow Profile (IPC/JEDEC J-STD-020B)
Parameter
Symbol
Preheat Time
Ramp Up
Time Above 217 C
Time To Peak Temperature
Time At 260 C (max)
Time At 240 °C (max)
Ramp Down
o
o
Value
150 sec Min, 200 sec Max
3 C/sec Max
60 sec Min, 150 sec Max
480 sec Max
10 sec Max
60 sec Max
6 C/sec Max
o
o
t
S
R
UP
t
L
t
AMB-P
t
P
t
p2
R
DN
Vectron International 267 Lowell Rd, Hudson NH 03051
Tel: 1-88-VECTRON-1
e-mail vectron@vectron.com
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