HC-49U Crystal Unit
MXF series
F
EATURE
Wide Frequency Range
Resistance Welded
High precision and high frequency stability
Applications: Data Application, Computer Machines, Printers, CPU,
Memory, Test Equipment, Large Pullability Applications
P
ART
N
UMBERING
S
YSTEM
MXF
(1)
No
(1)
(2)
(3)
(4)
(5)
(6)
F
(2)
H
(3)
J
(4)
Item
C
(5)
1M8432
(6)
Code
MXF
F
H
J
C
1M8432
Description
Crystal Unit
F: 20pF
H: ±30ppm
J: ±50ppm
C: -20~+70ºC
1M8432: 1.8432 MHz
HC-49U
E: 18pF, R: Series Resonance (see options)
F: ±20ppm, G: ±25ppm (see options)
G: ±25ppm, H: ±30ppm (see options)
C: -20~+70ºC, I: -40~+85ºC (see options)
1M8432 ~ 200M0 (M denotes decimal point)
Series Reference
Meritek Series
Load Capacitance
Frequency Tolerance
Stability vs Oper Temp.
Operating Temp.
Frequency
D
IMENSIONS AND
R
ECOMMENDED
P
ATTERN
Item
A
B
C
D
(Unit: mm)
Size
11.5 max.
10.3 max.
13.46 max.
3.8 max.
Item
E
d
p
L
Size
5.0 max.
0.457 max.
4.88±0.20
12.7 min.
A
VAILABLE
O
PTIONS
Parameters
Load Capacitance
Frequency Tolerance
Stability vs Oper Temp.
Operating Temperature
Part Number Options
R: Series Resonance, 3: 3pF ~ 8: 8pF,
A: 10pF, B: 12pF, C: 15pF, D: 16pF, E: 18pF, F: 20pF, K: 22pF, G: 25pF, H: 30pF, L: 32pF
A: ±10ppm, C: ±15ppm, F: ±20ppm, G: ±25ppm, H: ±30ppm, J: ±50ppm
A: ±10ppm, C: ±15ppm, F: ±20ppm, G: ±25ppm, H: ±30ppm, J: ±50ppm, K: ±100ppm
B: 0~+70°C, A: -10~+60°C, C: -20~+70°C, K: -30~+85°C, I: -40~+85°C, R: -40~+105°C
Note: Custom options available. Contact Meritek for more information.
Meritek Electronics Corporation
|
www.meritekusa.com
Rev.7a 12/22/2017
HC-49U Crystal Unit
MXF series
E
LECTRICAL
C
HARACTERISTICS
Parameters
Nominal Frequency Range
Fundamental
Operation Mode
3 Overtone
5 Overtone
7 Overtone
Load Capacitance
Frequency Tolerance (at
25ºC)
Freq Stability over Oper Temp.
Operating Temperature
Storage Temperature
Drive Level
Aging
Shunt Capactiance
Insulation Resistance
Drive Level Dependency (DLD)
1.8432 ~ 1.999 Fund.
2.0 ~ 2.399 Fundamental
2.4 ~ 2.999 Fundamental
3.0 ~ 3.699 Fundamental
3.7 ~ 4.199 Fundamental
4.2 ~ 4.899 Fundamental
Equivalent Series
Resistance
4.9 ~ 5.999 Fundamental
6.0 ~ 7.999 Fundamental
8.0 ~ 9.999 Fundamental
10.0 ~ 12.499 Fundamental
12.5 ~ 40.400 Fundamental
40.001 ~ 100.000 3 OT
100.001 ~ 150.000 5 OT
120.001 ~ 200.000 7 OT
*Specifications subject to change without notice.
th
th
rd
th
th
rd
Characteristic
1.8432 ~ 200.000 MHz
1.8432 ~ 40.000 MHz
40.001 ~ 100.000 MHz
100.001 ~ 150.000 MHz
150.001 ~ 200.000 MHz
18.0 pF (see options)
±30 ppm (see options)
±50 ppm (see options)
-20 ~ +70°C (see options)
-55 ~ +125°C
1 mW max. (100 µW typ.)
±5 ppm / year
7.0 pF max.
500 MΩ min. (@100Vdc ±15V)
1 µW ~ 500 µW (min. 7 points tested)
750 Ω max.
550 Ω max.
350 Ω max.
200 Ω max.
100 Ω max.
70 Ω max.
50 Ω max.
40 Ω max.
35 Ω max.
30 Ω max.
25 Ω max.
40 Ω max.
80 Ω max.
120 Ω max.
Meritek Electronics Corporation
|
www.meritekusa.com
Rev.7a 12/22/2017
Test/Measurement
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