Crystal unit
SMALL SMD LOW / MEDIUM-FREQUENCY CRYSTAL UNIT
MC-306
Product number (please refer to page 1)
Q1 xMC 3 0 6 x x x x x 0 0
• High-density mounting-type SMD.
• Photolithography finished allows uniform and stable performance.
• Excellent reliability and environmental capability.
Actual size
Specifications (characteristics)
Item
Symbol
f
T
STG
T
OPR
GL
∆f/f
θT
a
C
L
R
1
C
1
C
0
IR
fa
S.R.
32.768 kHz
Specifications
20.000 kHz to 165.000 kHz
-55 °C to +125 °C
-40 °C to +85 °C
1.0 µW Max.
±20 x 10
-6
, ±50 x 10
-6
±50 x 10
-6
, ±100 x 10
-6
Ta=+25 °C, DL=0.1 µW
Stored as bare product after unpacking
Remarks
Nominal frequency
Temperature
range
Storage temperature
Operating temperature
Maximum drive level
Frequency tolerance (standard)
Peak temperature (frequency)
Temperature coefficient (frequency)
Load capacitance
Series resistance
Motional capacitance
Shunt capacitance
Insulation resistance
Aging
Shock resistance
+25 °C ±5 °C
-0.04 x 10
-6
/ °C
2
Max.
6 pF to
∞
(Standard : 12.5 pF)
50 kΩ Max.
1.8 fF Typ.
0.9 pF Typ.
55 kΩ to 10 kΩ
4.0 fF to 0.6 fF
2.0 pF to 0.6 pF
500 MΩ Min.
±3 x 10
-6
/year Max.
±5 x 10
-6
/year Max.
Ta=+25 °C ±3 °C, first year
Please specify
For details, refer to page 13
±5 x 10
-6
Max.
Three drops on a hard board from 750 mm or excitation
test with 29400 m/s
2
x 0.3 ms x 1/2 sine wave x 3 directions
External dimensions
8.0 Max.
#4
#3
(Unit: mm)
Recommended soldering pattern
(Unit: mm)
Internal connection
#4
3.8 Max.
#3
#1
#2
2.54 Max.
2.38
0.5
5.5
(0.9)
1.9
(0.9)
Do not connect #2 and #3 to external device.
Metal may be exposed on the top or bottom of this product. This won't affect any quality, reliability or electrical spec.
19
1.9
1.3
1.9
32.768k
E 571
1.3
3.2
4.2
1.3
#1
#2
京公网安备 11010802033920号
EEWORLD
