CF5017 series

SEIKO NPC CORPORATION —1

3rd Overtone Crystal Oscillator Module ICs

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

I

2.7 to 5.5V operating supply voltage range

I

30MHz to 80MHz oscillation frequency range

(varies with version)

I

– 40 to 85

°C operating temperature range

I

Oscillation capacitors built-in

I

Inverter amplifier feedback resistor built-in

I

Standby function

• High impedance in standby mode, oscillator stops

I

Low standby current

• Power-saving pull-up resistor built-in

I

I

Output drive capability

I

CMOS output duty level (1/2VDD)

I

50

± 5% output duty (at 1/2VDD)

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30pF output load

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Molybdenum-gate CMOS process

I

Chip form (CF5017AL

×)

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 authentication. However, the

oscillator frequency band is not guaranteed. Specifically, the characteristics can vary greatly due to crystal characteristics and mounting condi-

tions, so the oscillation characteristics of components must be carefully evaluated.

gm ratio

Built-in capacitance [pF]

Rf

[k

Ω]

3V operation

5V operation

CF5017ALA

2.7 to 5.5

30 to 36

30 to 44

0.25

815

3.5

CF5017ALB

2.7 to 5.5

36 to 50

40 to 60

0.50

3.5

CF5017ALC

2.7 to 5.5

44 to 60

60 to 80

0.75

3.5

CF5017ALD

2.7 to 3.6

53 to 80

–

1.00

3.0

Device

Package

CF5017AL

×–2

Chip form