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PDF MC-306 Data sheet ( Hoja de datos )
| Número de pieza | MC-306 | |
| Descripción | SMALL SMD LOW / MEDIUM-FREQUENCY CRYSTAL UNIT | |
| Fabricantes | ETC | |
| Logotipo |  |
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SMALL SMD LOW / MEDIUM-FREQUENCY
CRYSTAL UNIT
MC-306
• High-density mounting-type SMD.
• Photolithography finished allows uniform and stable performance.
• Excellent reliability and environmental capability.
• 2.54mm thickness is equal to SMD-type IC.
Actual size
Specifications (characteristics)
Item
Symbol
Specifications
Nominal frequency
f
32.768 kHz
20.000 kHz to 165.000 kHz
Temperature
range
Storage temperature
Operating temperature
Maximum drive level
TSTG
TOPR
GL
Soldering condition
Frequency tolerance (standard)
Peak temperature (frequency)
Temperature coefficient (frequency)
Load capacitance
Series resistance
Motional capacitance
Shunt capacitance
Insulation resistance
Aging
TSOL
∆f/f
θT
a
CL
R1
C1
C0
IR
fa
-55˚C to +125˚C
-40˚C to +85˚C
1.0µW max.
Twice at under 260˚C within 10 sec.
or under 230˚C within 3 min.
±20ppm, ±50ppm
±50ppm, ±100ppm
25˚C ±5˚C
-0.04ppm/ ˚C2 max.
50 kΩ max.
1.8fF typ.
6pF to ∞
55 kΩ to 10 kΩ
4.0fF to 0.6fF
0.9pF typ.
2.0pF to 0.6pF
500 MΩ min.
±3ppm/Y max.
±5ppm/Y max.
Remarks
Stored as bare product after unpacking
Ta=25˚C, DL=0.1µW
Please specify
As per below table
Ta=25˚C ±3˚C, first year
Shock resistance
S.R.
±5ppm max.
Three drops on a hard board from 75 cm or excitation
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.
Series resistance
Frequency (kHz)
Series resonance
resistance (Ω)
External dimensions
20 ≤ f < 30
55K Ω max.
30 ≤ f < 40
45K Ω max.
40 ≤ f < 60
20K Ω max.
(Unit: mm)
60 ≤ f < 70
70 ≤ f < 120
120 ≤ f < 165
15K Ω max.
12K Ω max.
10K Ω max.
Recommended soldering pattern (Unit: mm)
8.0 max.
#4 #3
32.768k
E 571
#1 #2
Internal connection
#4 #3
#1 #2
1.3 4.2 1.3
0.5
5.5
Do not connect #2 and #3 to external device.
1.9
(0.9) (0.9)
http://www.spezial.cz---spezial@spezial.cz---Hotlines:Tel (02)24342200---Fax(02)24343200
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