Actual size
http://www.epsontoyocom.co.jp
Crystal unit Epson Toyocom
Specifications (characteristics)
Item
Symbol
Specifications
Remarks
FC-255
Nominal frequency range
f_nom
32.768 kHz
32 kHz to 100 kHz
Please contact us for inquiries
regarding available frequencies.
Temperature
range
Storage
temperature
T_stg
-55 C to +125 C
Store as bare product after unpacking
Operating
temperature
T_use
-40 C to +85 C
Level of drive
DL
0.5 W Max.
Frequency tolerance
(standard)
f_tol
20 10-6
+25 C, DL=0.1 W
Please ask for tighter tolerance
Turnover temperature
Ti
+25 C 5 C
Parabolic coefficient
B
-0.04 10-6 / C2 Max.
Load capacitance
CL
7 pF, 12.5 pF
Please specify
Motional resistance (ESR)
R1
70 k to 30 k
Motional capacitance
C1
2.3 fF to 0.6 fF
Shunt capacitance
C0
1.7 pF to 0.9 pF
Frequency aging
f_age
3 10-6 / year Max.
+25 C, First year
External dimensions (Unit:mm)
.
Footprint (Recommended) (Unit:mm)
FC-145
FC-255
kHz RANGE CRYSTAL UNIT
LOW PROFILE SMD
FC - 145 / FC - 255
Frequency range : 32.768 kHz (32 kHz to 100 kHz)
External dimensions : 4.1 × 1.5 × 0.8 t (mm) ···FC-145
: 4.9 × 1.8 × 0.8 t (mm) ···FC-255
Overtone order : Fundamental
Applications : Small communications devices
Product Number (please contact us)
FC-145 : Q13FC1450xxxx00
FC-255 : Q1xFC2550xxxx00
4.1±0.1
0.9
2.3
1.5±0.1
0.8±0.1
A501J
#2
Internal connection
(TOP VIEW)
#1
#2
FC-145
#1
4.9±0.1
0.85
3.2
0.8±0.1
A501J
#2
1.8±0.1
FC-255
#1
Internal connection
(TOP VIEW)
#1
#2
1.8
3.2
1.1
2.2
4.2
1.3
FC-145
FC-255
Do not design any patterns on shaded area.