Crystal unit
THIN SMD LOW/MEDIUM-FREQUENCY CRYSTAL UNIT
MC-156
• High-density mounting-type SMD of 1.5mm thickness.
• Small packaging area and light weight.
• Excellent shock resistance and environmental capability.
• Most suitable for small communications devices.
Actual size
Specifications (characteristics)
Item
Symbol
Specifications
32.768kHz
-55˚C to +125˚C
-40˚C to +85˚C
1.0µW max.
Operating drive level 0.5µW max.
75.000kHz
Remarks
please contact us for inquiries
about usable frequencies
Nominal frequency
Temperature
range
f
T
STG
T
OPR
GL
T
SOL
∆f/f
θT
a
C
L
R
1
C
1
C
0
IR
fa
Storage temperature
Operating temperature
Maximum drive level
Soldering condition
Frequency tolerance(standard)
Peak temperature(frequency)
Temperature coefficient(frequency)
Load capacitance
Series resistance
Motional capacitance
Shunt capacitance
Insulation resistance
Aging
Twice at under 260
˚C within 10 sec.
or under 230˚C within 3 min.
±20ppm, ±50ppm
25˚C ±5˚C
-0.04ppm/ ˚C
2
max.
6pF to
∞
65 kΩ max.
1.9fF typ.
0.8pF typ.
500 MΩ min.
±3ppm/year max.
Ta=25˚C ±3˚C, first year
Three drops on a hard board from 75 cm or excitation
test with 3000G x 0.3ms x 1/2 sine wave x 3 directions
Ta=25˚C, DL=0.1µW
Please specify
30kΩ
Shock resistance
S.R.
±5ppm max.
Metal may be exposed on the top of this product. This won't affect any quality, reliability or electrical spec.
External dimensions
Internal connection
#3
#4
3.3max.
#3
(Unit: mm)
Recommended soldering pattern
(Unit: mm)
7.1 max.
#4
1.2
3.88
1.2
EA89
#1
#2
2.5
#1
#2
1.5 max.
0.4
5.08
(0.75)
1.6
(0.75)
Do not connect
#2 and #3 to external device.
17
1.3
1.5
1.0
1.5
EPSON [ EPSON COMPANY ]
