OVERVIEW

The CF5017 series are 3rd overtone crystal oscillator ICs. Devices are available that provide 3rd overtone oscillation in the range 30MHz to 80MHz. The oscillator circuit is comprised of feedback resistors with good temperature characteristics and oscillation capacitors with excellent frequency response for stable 3rd overtone oscillation. Also, the chip layout is optimized, resulting in a large reduction in chip surface area compared to existing devices.

FEATURES

■ 2.7 to 5.5V operating supply voltage range

■ 30MHz to 80MHz oscillation frequency range (varies with version)

■ – 40 to 85°C operating temperature range

■ Oscillation capacitors built-in

• CG = 8pF, CD = 15pF

■ Inverter amplifier feedback resistor built-in

■ Standby function

• High impedance in standby mode, oscillator stops

■ Low standby current

• Power-saving pull-up resistor built-in

■ fO output frequency (oscillation frequency)

■ Output drive capability

• 8mA (VDD = 2.7V)

• 16mA (VDD = 4.5V)

■ CMOS output duty level (1/2VDD)

■ 50 ± 5 output duty (at 1/2VDD)

■ 30pF output load

■ Molybdenum-gate CMOS process

■ Chip form (CF5017AL×)