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| PartNumber | ECS-180-S-4X | ECS-180-20-1X | ECS-180-18-4XEN |
| Description | Crystals 18MHz SERIES | Crystals 18MHz 20pF | Crystals 18MHz 18pF 50ppm -40C +85C |
| Manufacturer | ECS | ECS | ECS |
| Product Category | Crystals | Crystals | Crystals |
| RoHS | Y | Y | Y |
| Termination Style | Radial | Radial | Radial |
| Package / Case | HC-49/US | HC-49 | HC-49/USX |
| Load Capacitance | Series | 20 pF | 18 pF |
| Frequency | 18 MHz | 18 MHz | 18 MHz |
| Tolerance | 30 PPM | 30 PPM | 30 PPM |
| Frequency Stability | 50 PPM | 50 PPM | 50 PPM |
| ESR | 40 Ohms | - | 40 Ohms |
| Drive Level | 500 uW | - | 500 uW |
| Minimum Operating Temperature | - 10 C | - 10 C | - 40 C |
| Maximum Operating Temperature | + 70 C | + 70 C | + 85 C |
| Length | 11.35 mm | 11.35 mm | 11.35 mm |
| Width | 4.65 mm | 4.65 mm | 4.65 mm |
| Height | 3.5 mm | 13.46 mm | 3.5 mm |
| Series | HCS-49USX | HC49UX | HCS-49USX |
| Packaging | Bulk | - | Bulk |
| Type | Quartz Crystal | Quartz Crystal | - |
| Brand | ECS | ECS | ECS |
| Mounting Style | Through Hole | Through Hole | Through Hole |
| Product Type | Crystals | Crystals | Crystals |
| Factory Pack Quantity | 200 | 100 | - |
| Subcategory | Crystals | Crystals | Crystals |
| Unit Weight | 0.019667 oz | 0.034000 oz | - |