Crystal unit
Product Number (please contact us)
MC-306
: Q1xMC3062xxxx00
MC-405
: Q1xMC4052xxxx00
MC-406
: Q1xMC4062xxxx00
kHz RANGE CRYSTAL UNIT
MC - 306
MC - 405 / MC - 406
Frequency range
Thickness
Overtone order
Applications
:
:
32.768 kHz (20 kHz to 120 kHz)
8.0 × 3.8 × 2.54 mm ···MC-306
10.41 × 4.06 × 3.6 mm ···MC-405 / 406
: Fundamental
: Clock and Microcomputer
Actual size
MC-306
MC-405 / 406
Specifications (characteristics)
Item
Nominal frequency range
Storage temperature
Operating temperature
Level of drive
Frequency tolerance (standard)
Turnover temperature
Parabolic coefficient
Load capacitance
Motional resistance (ESR)
Symbol
f_nom
T_stg
T_use
DL
f_tol
Ti
B
CL
R1
Motional capacitance
C1
Shunt capacitance
C0
Frequency aging
f_age
Specifications
20 kHz to 120 kHz
-55 C to +125 C
-40 C to +85 C
1.0 W Max.
20 10-6, 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 k Max.
As per table below
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.
3 10-6 / year Max.
5 10-6 / year Max.
32.768 kHz
Conditions / Remarks
Please contact us about available frequencies.
Storage as single product.
+25 C, DL=0.1 W
Please specify
MC-306
MC-405 / 406
MC-306
MC-405 / 406
+25 C, First year
Motional resistance (ESR)
Frequency
Motional resistance
Product name
(Standard form)
MC-306 32.768000kHz 12.5 +20.0-20.0
①
②
③
④
①Model
②Frequency
③Load capacitance(pF)
31.2 kHzf_nom< 40 kHz
35 k Max.
40 kHzf_nom< 90 kHz
20 k Max.
90 kHzf_nom120 kHz
12 k Max.
-6
④Frequency tolerance(× 10 , +25 C)
External dimensions
(Unit:mm)
Internal connection in MC-405
(TOP VIEW)
MC-405 / 406
MC-306
8.0 Max.
3.8 Max.
3.2
E 6571A
#1
#2
#4
2.54 Max.
2.38
0.5
(0.9)
2.54
(0.9)
Do not connect #2 and #3 to external device.
The metal case inside of the molding compound may be exposed on the top or bottom of this product.
This purely cosmetic and does not have any effect on quality, reliability or electrical specs.
2.54
#2
0.51
0.2 Min.
1.9
5.5
#3
#1
10.41 Max.
#2
#2
Internal connection in MC-406
(TOP VIEW)
3.6 Max.
#1
#3
#1
9.60
#2
#1
#3
32.768 k
#4
3.15
32.768 k
E
571
Internal connection
(TOP VIEW)
#3
#4
4.06 Max.
#4
#3
#4
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
Footprint (Recommended)
(Unit:mm)
MC-405
0.8
4.1
1.9
1.52
MC-406
1.3
1.52
MC-306
4.1
1.9
.
20 kHzf_nom< 31.2 kHz
55 k Max.
1.3
4.2
1.3
4.1
3.9
4.1
3.9
4.1
