27
Crystal unit
28
Crystal unit
Specifications (characteristics)
Specifications (characteristics)
External dimensions (Unit: mm)
Recommended soldering pattern
(Unit: mm)
THIN SMD HIGH-FREQUENCY CRYSTAL UNIT
FA-238
Product number (please refer to page 1)
Q22FA238xxxxx00
• High-density mounting-type SMD.
• Excellent shock resistance.
• Capable of covering a wide frequency range. (from 16 MHz to 50 MHz)
• 0.6 mm Typ. thickness is equal to SMD-type IC.
• Most suitable for small communication devices.
• Available for lead (Pb)-free soldering.
• Complete lead (Pb)-free product.
Actual size
Item Symbol Specifications Remarks
Nominal frequency f 16.000 MHz to 50.000 MHz Fundamental mode
Temperature
range
Storage temperature
TSTG -40 ˚C to +125 ˚C Stored as bare product after unpacking
Operating temperature
TOPR -40 ˚C to +85 ˚C Specified equivalent series must be satisfied.
Operable temperature
TUSE As per below table
Specified equivalent series and frequency temperature characteristics must be satisfied.
Recommended drive level DL 10 µW to 100 µW
Frequency tolerance Δf/f ±50 x 10-6 (standard)
(±15 x 10-6 to ±50 x 10-6 is available)
Ta = +25 ˚C ±3 ˚C
For the out of standard specifications,
please contact us for inquiries. ∗1
Frequency temperature
characteristics
±30 x 10-6 (standard)
As per below table
-20 ˚C to +70 ˚C
For the out of standard specifications,
please contact us for inquiries. ∗1
Load capacitance CL7 pF to ∞ (standard:10 pF) Please specify
Series resistance R1 As per below table Operable temperature range , DL = 100 µW
Shunt capacitance C05.0 pF Max.
Insulation resistance IR 500 MΩ Min.
Aging fa ±5 x 10-6 / year Max. Ta = +25 ˚C ±3 ˚C, first year
Shock resistance S.R. ±10 x10-6 Max.
100 g dummy (Seiko Epson Standard) drop from 1500 mm height
on to the concrete 3 directions 10 times.
∗1 f > 40 MHz : Only standard specifications
External dimensions (Unit: mm)
Recommended soldering pattern
(Unit: mm)
Frequency temperature characteristics
Operable temperature Frequency tolerance
0 ˚C to +50 ˚C ± 8 x 10-6 Min.
-10 ˚C to +60 ˚C ± 12 x 10-6 Min.
-20 ˚C to +70 ˚C ± 15 x 10-6 Min.
-30 ˚C to +80 ˚C ± 20 x 10-6 Min.
-40 ˚C to +85 ˚C ± 30 x 10-6 Min.
0.6±0.1
2.5±0.1
0.7
1.2
0.9
0.8
3.2±0.1
#3
#4
#2
#1
Internal connection
# 4
# 1
# 3
# 4
# 1
# 3
# 2
# 2
#2 and #4 is connected with a cover.
1.6
1.4
1.2
2.2
Series resistance (R1)
Frequency Series resistance
16.0 MHz ≤ f < 20.0 MHz 80 Ω Max.
20.0 MHz ≤ f < 25.0 MHz 60 Ω Max.
25.0 MHz ≤ f < 30.0 MHz 50 Ω Max.
30.0 MHz ≤ f ≤ 50.0 MHz 40 Ω Max.
