Cylindrical kHz Crystals Manufacturer | TKD

TKD Cylindrical kHz crystals provide dependable 32.768 kHz timing for clock, RTC and low-power applications in compact cylindrical packages. High accuracy, low ESR and excellent shock resistance make them a proven choice for consumer and industrial timing.

Ranges of Cylindrical kHz Crystals

These 32.768 kHz tuning-fork crystals come in durable cylindrical packages with low ESR and tight frequency tolerance. They are widely used in RTC modules, wristwatches, meters and low-power IoT devices requiring dependable timekeeping.

TF-145 Series Cylindrical kHz Crystals | TKD

TF-145

TF-206 Series Cylindrical kHz Crystals | TKD

TF-206

TF-206cut Series Cylindrical kHz Crystals | TKD

TF-206cut

TF-206bent Series Cylindrical kHz Crystals | TKD

TF-206bent

TFG-206 Series Cylindrical kHz Crystals | TKD

TFG-206

TFD-206 Series Cylindrical kHz Crystals | TKD

TFD-206

TF-308 Series Cylindrical kHz Crystals | TKD

TF-308

TF-308cut

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TFD-308

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Mechanical and Package Considerations for Cylindrical kHz Crystals

Cylindrical construction

The sealed metal cylinder protects the tuning-fork blank from moisture and mechanical stress, improving long-term reliability.

Shock resistance

Robust mounting keeps frequency stable under drop and vibration, important for wearables and portable devices.

Handling

Cylindrical packages are inserted or surface-mounted; follow recommended bending and soldering procedures to avoid stressing the leads.

Load Capacitance and ESR Matching in Tuning-Fork Circuits

Load capacitance

Match the crystal's specified CL (commonly 6–12.5 pF) with the circuit's external capacitors so the oscillator runs at exactly 32.768 kHz.

ESR budget

Low ESR (typically below 70 kΩ) ensures reliable oscillation with low drive circuits, critical for battery-powered RTCs.

Oscillator margin

Ensure the circuit's negative resistance comfortably exceeds the crystal ESR to guarantee start-up at low supply voltages.

Load Capacitance and ESR Matching in Tuning-Fork Circuits

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