Crystal Oscillator 2Pin HC-49S 6.7458MHZ

Description

Crystal Oscillator 2Pin HC-49S 6.7458MHZ

specifications for a 2-Pin HC-49S Crystal Oscillator – 6.7458 MHz:

📦 General Information

• Type: Quartz Crystal Resonator

• Package: HC-49S (short can, through-hole)

• Number of pins: 2

• Nominal frequency: 6.7458 MHz (often used in UART baud rate generation)

⚡ Electrical Characteristics

• Frequency tolerance: ±20 ppm (standard, others ±10 ppm or ±30 ppm available) @ 25 °C

• Load capacitance (CL): 18 pF (typical; available from 12 pF to 30 pF on request)

• Series resistance (ESR): ≤ 50 Ω (typical for this frequency)

• Drive level: 100 µW (max recommended), 500 µW absolute max

• Shunt capacitance (C0): 5 pF max

• Aging: ±3 ppm/year (typical)

🌡 Environmental Characteristics

• Operating temperature range: −20 °C to +70 °C (standard)

• Storage temperature range: −40 °C to +85 °C

• Shock resistance: 1000 g for 0.3 ms

• Vibration resistance: 10–55 Hz, 1.5 mm amplitude, 2 hours each axis

📏 Mechanical Characteristics

• Package dimensions: ~11.2 mm (length) × 4.8 mm (width) × 3.8 mm (height)

• Lead diameter: ~0.45 mm

• Lead spacing: ~4.88 mm

• Weight: ~0.4 g

💡 Notes

• Requires connection to an external oscillator circuit (typically two load capacitors and an inverter inside the MCU).

• The 6.7458 MHz frequency is a “baud rate crystal” — ideal for generating precise UART baud rates like 9600, 19200, etc., without error.