MC306 Datasheet, PDF (1/1 Pages) List of Unclassifed Manufacturers – SMALL SMD LOW / MEDIUM-FREQUENCY CRYSTAL UNIT

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 ^TSTG
Operating temperature _TOPR
Maximum drive level
GL
Soldering condition
TSOL
Frequency tolerance (standard)
∆f/f
Peak temperature (frequency)
θT
Temperature coefficient (frequency)
a
Load capacitance
CL
Series resistance
R1
Motional capacitance
C1
Shunt capacitance
C0
Insulation resistance
IR
Aging
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)
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