Crystal unit
kHz RANGE CRYSTAL UNIT
SMD
MC - 306
MC - 405 / MC - 406
•Frequency range
•Thickness
: 32.768 kHz (20 kHz to 165 kHz)
: 2.54 mm Max.(MC-306)
3.60 mm Max.(MC-405 / 406)
: Fundamental /Overtone (307.2 kHz)
: Clock and Microcomputer
•Overtone order
•Applications
Actual size
MC-306
MC-405 / 406
Specifications (characteristics)
Item
Symbol
Nominal frequency range
Specifications
20 kHz to 165 kHz
307.2 kHz(MC-405 / 406)
-55 °C to +125 °C
-40 °C to +85 °C
1.0 µW Max.
-6
±20 × 10 , ±50 × 10-6
±50 × 10-6, ±100 × 10-6
+25 °C ±5 °C
-0.04 × 10-6 / °C2 Max.
6 pF to ∞ (standard :12.5 pF)
50 kΩ Max.
55 kΩ to 6 kΩ
1.8 fF Typ.
4.0 fF to 0.6 fF
2.0 fF Typ.
0.9 pF Typ.
2.0 pF to 0.6 pF
0.85 pF Typ.
-6
-6
±3 × 10 / year Max.
±5 × 10 / year Max.
f
Temperature Storage temperature
range
Operating temperature
Level of drive
Frequency tolerance (standard)
Turnover temperature
Parabolic coefficient
Load capacitance
Motional resistance (ESR)
32.768 kHz
T_stg
T_use
DL
f_tol
Ti
B
CL
R1
Motional capacitance
C1
Shunt capacitance
C0
Frequency aging
f_age
Remarks
Please contact us regarding available frequencies
Store as bare product after unpacking
+25 °C, DL=0.1 µW
Please specify
As per below table
MC-306
MC-405 / 406
MC-306
MC-405 / 406
+25 °C, First year
Motional resistance (ESR)
Frequency
Motional resistance
31.2 kHz≤f< 40 kHz
35 kΩ Max.
40 kHz≤f< 90 kHz
20 kΩ Max.
90 kHz≤f< 130 kHz
12 kΩ Max.
307.2 kHz
6 kΩ Max.
130 kHz≤f≤165 kHz
10 kΩ Max.
(Unit:mm)
External dimensions
Internal connection in MC-405
MC-405 / 406
8.0 Max.
#4
#4
#3
#4
#3
32.768 k
E 6571A
#1
#2
Internal connection in MC-406
#4
3.15
1.9
5.5
(0.9)
2.54
(0.9)
Do not connect #2 and #3 to external device.
Metal may be exposed on the top or bottom of this product.
This will not affect any quality, reliability or electrical spec.
2.54
#3
#2
0.51
0.2 Min.
0.5
10.41 Max.
#2
#2
#1
2.54 Max.
2.38
#1
#3
#1
9.60
#2
#1
Internal connection
4.06 Max.
3.2
32.768 k
5 71
E
3.8 Max.
#3
#4
3.6 Max.
MC-306
0.51
2.29
Do not connect #2 and #3 of MC-406 to external device.
The first digit of No. means:
5××××
6××××
MC-405
MC-406
(Unit:mm)
Footprint (Recommended)
MC-405
0.8
4.1
1.9
1.52
MC-406
1.3
1.52
MC-306
4.1
1.9
.
20 kHz≤f< 31.2 kHz
55 kΩ Max.
1.3
4.2
4.1
3.9
3.9
4.1
4.1
1.3
http://www.epsontoyocom.co.jp
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