SPECIFICATION FOR APPROVAL
CUSTOMER
NOMINAL FREQUENCY
PRODUCT TYPE
SPEC. NO. ( P/N )
CUSTOMER P/N
ISSUE DATE
VERSION
APPROVED
PREPARED
August 6, 2019
A
QA
18.432000 MHz
TYPE GC 49S SMD QUARTZ CRYSTAL
49SMLB18.4320-20GHC-E(T)
Diodes Incorporated
No.2, Ziqiang 5th Rd., Zhongli Industrial Park,
Zhongli Dist., Taoyuan City 32063, Taiwan (R.O.C.)
TEL: 886-3-451-8888
FAX: 886-3-461-3865
https://www.diodes.com
*RoHS Compliant
*HF-Halogen Free
*REACH Compliant
Diodes Internal Reference NO. GC1840017
E0-R-4-014 Rev. F
Page
i
TYPE GC 49S SMD QUARTZ CRYSTAL
49SMLB18.4320-20GHC-E(T)
VERSION HISTORY
Version
No.
A
Version
Date
Aug.6,2019
Initial Release
Description
Notes
VER. A
6-Aug-19
E0-R-4-014 Rev. F
Page
ii
TYPE GC 49S SMD QUARTZ CRYSTAL
49SMLB18.4320-20GHC-E(T)
ELECTRICAL SPECIFICATIONS
Item
Nominal Frequency
Mode of Oscillation
Calibration Load Capacitance
Calibration Tolerance
Operating Temperature Range
Frequency Stability
(Frequency Deviation over the
Operating Temperature Range)
Operating Drive Level
Maximum Drive Level
Equivalent Series Resistance
Shunt Capacitance
Aging at 25°
C
Storage Temperature
Insulation Resistance
ESR
C0
VER. A
6-Aug-19
Symbol
Fn
MO
CL
FL
TR
F/T
Specifications
18.432000
AT Cut-Fundamental
20
±30
-20 to +70
±50
100
500
40
7
±5
-55 to +125
500
Units
MHz
Notes
pF
ppm at 25°
C±3°
C
°
C
ppm Reference to the Frequency at 25°
C
µW
µW
Max
pF
Max
ppm Max, 1st year
°
C
M
Min
E0-R-4-014 Rev. F
Page 1
TYPE GC 49S SMD QUARTZ CRYSTAL
49SMLB18.4320-20GHC-E(T)
RELIABILITY SPECIFICATIONS
MECHANICAL AND ENVIRONMENTAL RATINGS:
a) FINE LEAK TEST: JESD22-A109 (Condition 1A)
b) GROSS LEAK TEST: JESD22-A109 (Condition C)
c) MOISTURE RESISTANCE: JESD22-A113
d) SHOCK: JESD22-B104 (Condition B)
e) SOLDERABILITY : (RoHS version): J-STD-002
f) VIBRATION: JESD22-B103
g) SOLVENT RESISTANCE: JESD22-B107
h) RESISTANCE TO SOLDERING HEAT (RoHS version): J-STD-020D Table 5.2 Pb free devices (3 cycles max)
VER. A
6-Aug-19
SUGGESTED IR REFLOW PROFILE
*As per IPC-JEDEC J-STD-020D
E0-R-4-014 Rev. F
Page 2
TYPE GC 49S SMD QUARTZ CRYSTAL
49SMLB18.4320-20GHC-E(T)
MARKING
VER. A
6-Aug-19
S-GHCyywwv
18.4320-20-E
Date & Factory Code
Frequency Code
yy
Year Code (last
digit of year)
ww
Week
Code
v
Factory
Code
MECHANICAL DRAWINGS
( Scale: None. Dimensions are in mm.)
E0-R-4-014 Rev. F
Page 3
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