75 South Street, Hopkinton, MA 01748 800-982-5737 508-435-6831 Fax: 508-435-5289 www.valpeyfisher.com
67
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VF540
VF540
HCMOS/TTL Compatible
Surface Mount Clock Oscillators
F E AT U R E S
Very Low Phase Jitter
at All Frequencies
EMI Shielded
Tight Duty Cycle Available
Tristate Control Standard
Industry Standard Footprint
Parameter
Symb
Condition
Min
Typ
Max
Unit
Note
Input Break
Vcc
0.5
7.0
V
Down Voltage
Storage Temp.
Ts
55
+125
C
Frequency F
1.5
130
MHz
Range
Frequency
F/F
Overall conditions
100
ppm
1
Stability
including:
calibration, temp.,
aging 10 yrs,
shock, vibration
Input Voltage
Vcc
4.75
5.00
5.25
V
Standard
3.15
3.30 3.45
LV
Opt.
Input Current
Icc
15pF load, 50 MHz
40
mA
2
Load
Duty Cycle
@1.4V
40
50
60
%
3
(Symmetry)
Rise/Fall Time
Tr/Tf
0.4V to 2.4V
1.5
ns
20% to 80%
4.0
Logic "1" Level
Voh
Max Load
0.9Vcc
V
Logic "0" Level
Vol
Max Load
0.1Vcc
V
Startup Time
Ts
2
10
ms
Phase Jitter
1
1
ps
fj> 1KHz
Tristate Function
Enable/ Te/Td
100
ns
Disable Time
Operating
Temperature Range
0C to +70C (40C to +85C, 55C to +125C available)
Mechanical Shock
Per MILSTD202, Method 213, Cond. E
Thermal Shock
Per MILSTD883, Method 1011, Cond. A
Vibration
Per MILSTD883, Method 2007, Cond. A
Soldering Conditions
260C, for 10s, Max; 230C, for 90s, Max.
Hermetic Seal
Leak rate less than 5 x 10
8
atm.cc/s of helium
Pin Out
Pin #1Tristate Control
Pin #2Ground, Case
Pin #3Output
Pin #4Vcc
10 TTL gates or 50pF max.
Absolute
Max. Ratings
Electrical
Environmental and Mechanical
Electrical
Connections
Notes:
1. Up to 20ppm available.
2. Current is load and frequency dependent.
3. Standard symmetry, tighter available.
All specifications are subject to change without notice.
Input HIGH (>2.5V) or floating: ACTIVE
Input LOW (<0.5V): INFINITE IMPEDANCE
0.550" TYP
(13,97mm)
0.385"
(9,78mm)
0.018" TYP
(0,457mm)
0.200"
(5,08mm)
0.185" MAX
(4,70mm)
#4
#3
#1
#2
0.130" TYP
(3,302mm)
0.300" (7,62mm)
Mounting Center
#1
#2
#4
#3
VF540
19.44MHz
BO1H
0.350"
(8,89mm)
Creating a Part Number
VF540
FREQUENCY STABILITY
Code
Specification
S
20 ppm
A
25 ppm
B
50 ppm
100
ppm (std.)
C
500
ppm
DUTY CYCLE
Code
Specification
HH
2.5%
H
5%
10% (std.)
INPUT VOLTAGE
Code
Specification
L 3.3
5% Volt
5.0
5% Volt (std.)
OPERATIONAL TEMP. RANGE
Code
Specification
0
C to +70
C (std.)
1 -40
C to +85
C
2 -55
C to +125
C*
*Not always available
FREQ.
Example: VF540AHH-2-19.44MHz: Frequency Stability
25ppm,
Duty Cycle
2.5%, Input Voltage 5.0 Volt
5%, Operating
Temperature -55
C to +125
C, Frequency 19.44MHz.
All dimensions are typical unless otherwise specified.
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