Specification	ECS-184-18-28AX-TR

ESR (Equivalent Series Resistance)	40 Ohm
Frequency	18.432 MHz
Frequency Stability	50 ppm
Frequency Tolerance	30 ppm
Height - Seated (Max)	0.197 in
Load Capacitance	18 pF
Mounting Type	Surface Mount
Operating Mode	Fundamental
Operating Temperature (Max)	70 °C
Operating Temperature (Min)	-10 °C
Package Leads	4 Leads
Package Name	HC-49/US
Size / Dimension Length	0.492 in
Size / Dimension Width	0.191 in
Type	MHz Crystal

CSM-4AX Series

Part	Package / Case	Height - Seated (Max)	Operating Mode	Frequency Tolerance	Package Leads	Package Name	Frequency	Operating Temperature (Max)	Operating Temperature (Min)	Load Capacitance	Type	Mounting Type	Size / Dimension Length	Size / Dimension Width	Frequency Stability	ESR (Equivalent Series Resistance)
ECS Inc. ECS-143-20-28AX-TR	HC-49/US	0.197 in	Fundamental	30 ppm	4 Leads	HC-49/US	14.31818 MHz	70 °C	-10 °C	20 pF	MHz Crystal	Surface Mount	0.492 in	0.191 in	50 ppm	40 Ohm
ECS Inc. ECS-80-18-28AX-TR		0.197 in	Fundamental	30 ppm	4 Leads	HC-49/US	8 MHz	70 °C	-10 °C	18 pF	MHz Crystal	Surface Mount	0.492 in	0.191 in	50 ppm	80 Ohm
ECS Inc. ECS-184-20-28AX-TR	HC-49/US	0.197 in	Fundamental	30 ppm	4 Leads	HC-49/US	18.432 MHz	70 °C	-10 °C	20 pF	MHz Crystal	Surface Mount	0.492 in	0.191 in	50 ppm	40 Ohm
ECS Inc. ECS-184-18-28AX-TR		0.197 in	Fundamental	30 ppm	4 Leads	HC-49/US	18.432 MHz	70 °C	-10 °C	18 pF	MHz Crystal	Surface Mount	0.492 in	0.191 in	50 ppm	40 Ohm

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