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| PartNumber | ATS640B-E | ATS640BSM-1 | ATS640B |
| Description | Crystals 64MHz 18pF Fund. -40C +85C | Crystals 64MHz 18pF 3OT -20C +70C | Crystals 64MHz 18pF 3OT -20C +70C |
| Manufacturer | CTS | CTS | CTS-Frequency Controls |
| Product Category | Crystals | Crystals | Crystals |
| RoHS | Y | Y | - |
| Termination Style | Radial | SMD/SMT | Radial |
| Package / Case | HC-49/U | HC-49/US-SM | - |
| Load Capacitance | 18 pF | 18 pF | 18pF |
| Frequency | 64 MHz | 64 MHz | 64MHz |
| Tolerance | 30 PPM | 30 PPM | 30 PPM |
| Frequency Stability | 50 PPM | 50 PPM | ±50ppm |
| Minimum Operating Temperature | - 40 C | - 20 C | - |
| Maximum Operating Temperature | + 85 C | + 70 C | - |
| Length | 10.85 mm | 12.3 mm | 10.85 mm |
| Width | 4.5 mm | 4.83 mm | 4.5 mm |
| Height | 3.68 mm | 4.3 mm | 0.145" (3.68mm) |
| Series | ATS | ATS-SM | ATS |
| Packaging | Bulk | Reel | Bulk |
| Brand | CTS Electronic Components | CTS Electronic Components | - |
| Mounting Style | Through Hole | SMD/SMT | Through Hole |
| Product Type | Crystals | Crystals | - |
| Factory Pack Quantity | 100 | 1000 | - |
| Subcategory | Crystals | Crystals | - |
| Type | - | - | MHz Crystal |
| Operating Temperature Range | - | - | - 20 C to + 70 C |
| Package Case | - | - | HC-49/U |
| Operating Mode | - | - | 3rd Overtone |
| Operating Temperature | - | - | -20°C ~ 70°C |
| Mounting Type | - | - | Through Hole |
| Size Dimension | - | - | 0.427" L x 0.177" W (10.85mm x 4.50mm) |
| ESR Equivalent Series Resistance | - | - | 80 Ohm |
| Ratings | - | - | - |
| Frequency Tolerance | - | - | ±30ppm |