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HC-49/S crystals in a compact 7.0mm x 4.0mm size, often labeled as HC-49Sa or Mini HC-49S, are
common passive quartz resonators used for precise frequency generation in electronics, available from manufacturers like Acrrystals.com for various applications, featuring through-hole (pin-through) or surface-mount (SMD) options for fitting into smaller circuit board designs. Key Characteristics:
- Type: Passive Quartz Crystal Resonator.
- Package: HC-49/S (or smaller variants like HC-49Sa).
- Dimensions: Compact 7.0mm x 4.0mm footprint.
- Mounting: Available as through-hole (pin-through) or SMD (surface-mount).
- Frequency: Come in various MHz frequencies (e.g., 12-48MHz range) for specific timing needs.
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