
Actual size
http://www.epsontoyocom.co.jp
Crystal unit
Epson Toyocom
Specifications (characteristics)
Item
Symbol
Specifications
Remarks
Nominal frequency range
f_nom
32.768 kHz
20 kHz to 165 kHz
Please contact us regarding available frequencies
Storage temperature
T_stg
-55
°C to +125 °C
Store as bare product after unpacking
Temperature
range
Operating temperature
T_use
-40
°C to +85 °C
Level of drive
DL
1.0
W Max.
Frequency tolerance (standard)
f_tol
±20 × 10-6, ±50 × 10-6
±50 × 10-6, ±100 × 10-6
+25
°C, DL=0.1 W
Turnover temperature
Ti
+25
°C ±5 °C
Parabolic coefficient
B
-0.04
× 10-6 / °C2 Max.
Load capacitance
CL
6 pF to
∞ (standard :12.5 pF)
Please specify
Motional resistance (ESR)
R1
50 k
Max.
As per below table
1.8 fF Typ.
MC-306
Motional capacitance
C1
2.0 fF Typ.
4.0 fF to 0.6 fF
MC-405 / 406
0.9 pF Typ.
MC-306
Shunt capacitance
C0
0.85 pF Typ.
2.0 pF to 0.6 pF
MC-405 / 406
Frequency aging
f_age
±3 × 10-6 / year Max.
±5 × 10-6 / year Max.
+25
°C, First year
Motional resistance (ESR)
Frequency
20 kHz
≤f_nom< 31.2 kHz
31.2 kHz
≤f_nom< 40 kHz
40 kHz
≤f_nom< 90 kHz
90 kHz
≤f_nom< 130 kHz
130 kHz
≤f_nom≤165 kHz
Motional resistance
55 k
Max.
35 k
Max.
20 k
Max.
12 k
Max.
10 k
Max.
External dimensions
(Unit:mm)
.
Footprint (Recommended)
(Unit:mm)
MC-306
MC-405 / 406
MC-306
Metal may be exposed on the top or bottom of this product.
This will not affect any quality, reliability or electrical spec.
Do not connect #2 and #3 to external device.
Internal connection
(TOP VIEW)
#4
#1
#2
#3
1.9
(0.9)
5.5
0.5
2.
5
4
M
a
x
.
2.
3
8
8.0 Max.
#4
#1
#2
#3
3.
8
M
a
x
.
3.
2
32.768 k
E
5 71
Do not connect #2 and #3 of MC-406 to external device.
The first digit of No. means:
5××××
MC-405
6××××
MC-406
MC-405 / 406
#4
#1
#2
#3
#4
#1
#2
#3
Internal connection in MC-406
(TOP VIEW )
Internal connection in MC-405
(TOP VIEW)
0.2
Min.
3.
6
M
a
x
.
3.
15
2.54
4.
0
6
M
a
x
.
#1
#4
#3
#2
10.41 Max.
9.60
32.768 k
E
6571A
0.51
2.29
MC-306
MC-405
1.
52
0.
8
4.1
3.9
4.1
1.52
4.1
3.9
4.1
MC-406
1
.9
1.
9
1.
3
4.2
1.3
kHz RANGE CRYSTAL UNIT
SMD
MC - 306
MC - 405 / MC - 406
Frequency range
:
32.768 kHz (20 kHz to 165 kHz)
Thickness
:
8.0 × 3.8 × 2.54 t (mm) MC-306
10.41 × 4.06 × 3.6 t (mm) MC-405 / 406
Overtone order
:
Fundamental
Applications
:
Clock and Microcomputer
Product Number (please contact us)
MC-306
: Q1xMC3061xxxx00
MC-405
: Q1xMC4051xxxx00
MC-406
: Q1xMC4061xxxx00