Crystal unit
Product Number (please contact us)
MC-306 : Q1xMC3062xxxx00
MC-405 : Q1xMC4052xxxx00
kHz RANGE CRYSTAL UNIT
MC-406 : Q1xMC4062xxxx00
MC - 306
MC - 405 / MC - 406
Frequency range : 32.768 kHz (20 kHz to 120 kHz)
Thickness : 8.0 3.8 2.54 mm MC-306
Actual size
10.41 4.06 3.6 mm MC-405 / 406
Overtone order : Fundamental
MC-306 MC-405 / 406
Applications : Clock and Microcomputer
Specifications (characteristics)
Item Symbol Specifications Conditions / Remarks
Nominal frequency range f_nom 32.768 kHz 20 kHz to 120 kHz Please contact us about available frequencies.
Storage temperature T_stg -55 C to +125 C Storage as single product.
Operating temperature T_use -40 C to +85 C
Level of drive DL 1.0 W Max.
-6 -6 -6 -6
Frequency tolerance (standard) f_tol 20 10 , 50 10 50 10 , 100 10 +25 C, DL=0.1 W
Turnover temperature Ti +25 C 5 C
-6 2
Parabolic coefficient B -0.04 10 / C Max.
Load capacitance CL 6 pF to (standard :12.5 pF) Please specify
Motional resistance (ESR) R1 50 k Max. As per table below
1.8 fF Typ. MC-306
Motional capacitance C1 4.0 fF to 0.6 fF
2.0 fF Typ. MC-405 / 406
0.9 pF Typ. MC-306
Shunt capacitance C0 2.0 pF to 0.6 pF
0.85 pF Typ. MC-405 / 406
-6 -6
Frequency aging f_age 3 10 / year Max. 5 10 / year Max. +25 C, First year
Motional resistance (ESR)
Frequency 20 kHzf_nom< 31.2 kHz 31.2 kHzf_nom< 40 kHz 40 kHzf_nom< 90 kHz 90 kHzf_nom 120 kHz
Motional resistance 55 k Max. 35 k Max. 20 k Max. 12 k Max.
Product name MC-306 32.768000kHz 12.5 +20.0-20.0
(Standard form)
-6
Model Frequency Load capacitance(pF) Frequency tolerance( 10 , +25 C)
External dimensions (Unit:mm)
.
Internal connection in MC-405
MC-405 / 406
MC-306
(TOP VIEW)
8.0 Max.
#4 #3
#4 #3
Internal connection
#1
#2
#3
#4
32.768 k
(TOP VIEW)
32.768 k
#3 Internal connection in MC-406
#4
E 6571A
(TOP VIEW)
E 571
#1 #2
#4 #3
9.60
#2
#1
#1 #2
#1
#2 10.41 Max.
0.5
0.51 0.51
1.9
5.5
(0.9)
(0.9) 2.54
2.54
2.29
Do not connect #2 and #3 to external device.
Do not connect #2 and #3 of MC-406 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.
The first digit of No. means: 5 MC405
6 MC406
Footprint (Recommended) (Unit:mm)
MC-306
MC-405 MC-406
4.1 3.9 4.1
4.1 3.9 4.1
1.3 4.2 1.3
2.38
3.2
1.9 1.9
1.3
2.54 Max.
3.8 Max.
4.1
0.2 Min.
3.15
4.06 Max.
3.6 Max.
1.52 1.52
0.8