ETC MA-306

SMALL SMD HIGH - FREQUENCY CRYSTAL UNIT
MA-306
• High-density mounting-type SMD.
• Excellent reliability and environment capability.
• Capable of covering a wide frequency range. ( from 17.734 MHz
to 41 MHz)
• 2.54mm thickness is equal to SMD-type IC.
Actual size
Specifications (characteristics)
Symbol
Specifications
Remarks
f
17.734 MHz to 41.000 MHz
Fundamental mode
TSTG
-55˚C to +100˚C
Stored as bare product after unpacking
Operating temperature
TOPR
-20˚C to +70˚C
Maximum drive level
GL
2mW max.
Recommended drive level
DL
10µW to 100µW
Item
Nominal frequency
Storage temperature
Temperature
range
Drive level
Soldering condition
TSOL
Frequency tolerance (standard)
∆ f/f
Only crystal oscillation is guaranteed
Twice at under 260˚C within 10 sec.
or under 230˚C within 3 min.
Frequency temperature characteristics
(standard)
±50ppm
Ta=25˚C±3˚C
±30ppm
-20˚C to +70˚C
Load capacitance
CL
10pF to ∞
Please specify
Series resistance
R1
60 Ω max.
-20˚C to +70˚C, DL=100µW
Shunt capacitance
C0
5pF max.
Insulation resistance
IR
500 MΩ min.
Aging
fa
±5ppm/Y max.
S.R.
±10ppm max.
Ta=25˚C±3˚C, first year
Three drops on a hard board from 75 cm or excitation
Shock resistance
test with 3000G x 0.3ms x 1/2 sine wave x 3 directions
There are some cases that a parts of the cylindrical capsule of quartz unit expose on the surface of the molding material.
External dimensions
(Unit: mm)
#3
#1
#2
1.3
4.2
1.3
1.9
3.2
20.000M
E
572
#4
3.8 max.
#3
#1
(Unit: mm)
Internal connection
8.0 max.
#4
Recommended soldering pattern
1.9
2.38
2.54 max.
1.3
#2
0.5
1.9
5.5
(0.9)
(0.9)
Do not connect #2 and #3 to external device.
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