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OVERVIEW

The CF5035 series are 1.8V operation, high-frequency crystal oscillator module ICs. They support 70MHz to 165MHz (1.8V) and 70MHz to 220MHz (2.5 to 3.3V) 3rd overtone oscillation and fundamental oscillation modes. The crystal oscillator circuit is a Colpitts oscillator with the necessary oscillator capacitors and feedback resistor built-in. The oscillation characteristics feature little variation with supply voltage, providing stable oscillation over a wide supply voltage range. The output circuit comprises a CMOS buffer that can operate at high frequencies and drive a 15pF capacitance load. The devices are fabricated using a proprietary BiCMOS process with the oscillator circuit and output buffer on a single chip, making them ideal as SMD-type high-frequency crystal oscillators.

FEATURES

■ 1.6 to 3.6V operating supply voltage range

■ Oscillation frequency range (varies with version)

1.6 to 3.6V: 70MHz to 165MHz

2.25 to 3.6V: 70MHz to 220MHz

■ – 40 to 85°C operating temperature range

■ Oscillation capacitors built-in

■ Inverter amplifier feedback resistor built-in

■ Oscillation detector function built-in

■ Standby function

? High impedance in standby mode, oscillator stops

■ Low standby current

? Power-saving pull-up resistor built-in

■ CMOS output duty level

■ 15pF output load

■ 8mA output drive capability (VDD = 1.6V)

■ BiCMOS process

■ Chip form (CF5035AL×)

APPLICATIONS

■ 1.8V, high-frequency crystal oscillator modules