CF5035 series

SEIKO NPC CORPORATION —1

1.8V, High-frequency Crystal Oscillator Module ICs

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 feed-

back resistor built-in. The oscillation characteristics feature little variation with supply voltage, providing sta-

ble 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-fre-

quency crystal oscillators.

FEATURES

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1.6 to 3.6V operating supply voltage range

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Oscillation frequency range (varies with version)

1.6 to 3.6V: 70MHz to 165MHz

2.25 to 3.6V: 70MHz to 220MHz

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– 40 to 85

°C operating temperature range

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Oscillation capacitors built-in

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Inverter amplifier feedback resistor built-in

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Oscillation detector function built-in

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Standby function

• High impedance in standby mode, oscillator stops

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Low standby current

• Power-saving pull-up resistor built-in

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CMOS output duty level

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15pF output load

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BiCMOS process

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Chip form (CF5035AL

×)

APPLICATIONS

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1.8V, high-frequency crystal oscillator modules

SERIES CONFIGURATION

ORDERING INFORMATION

Version

Operating supply

voltage range [V]

Recommended operating

1. The recommended operating frequency is a yardstick value derived from the crystal used for NPC characteristics authentica-

tion. However, the oscillator frequency band is not guaranteed. Specifically, the characteristics can vary greatly due to crystal

characteristics and mounting conditions, so the oscillation characteristics of components must be carefully evaluated.

Built-in capacitance [pF]

CF5035ALA

1.6 to 3.6

70 to 95

4

4

CF5035ALB

95 to 125

4

4

CF5035ALC

125 to 165

2

2

CF5035ALD

2.25 to 3.6

165 to 220

1

1

Device

Package

CF5035AL

×–1

Chip form