CF5019 series

SEIKO NPC CORPORATION —1

High-Frequency, 3rd Overtone Crystal Oscillator Module ICs

OVERVIEW

The CF5019 series are high-frequency, 3rd overtone crystal oscillator module ICs. They incorporate an oscilla-

tor circuit and an output buffer that operate at high frequency on a single chip. The oscillator circuit employs

ogy, which suppresses oscillator characteristic variations due to changes in temperature and voltage to a mini-

mum. The CF5019 series can be utilized to construct stable, high-frequency, 3rd overtone crystal oscillators.

FEATURES

I

tor circuit

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2.25 to 3.6V operating supply voltage range

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Recommended operating frequency range

(varies with version)

• 2.5V operation: 60 to 155MHz

• 3.0V operation: 60 to 170MHz

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– 40 to 85

°C operating temperature range

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Oscillator capacitors with excellent frequency

response built-in

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Feedback resistors with good temperature charac-

teristics 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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Oscillation detector function

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CMOS output duty level (1/2VDD)

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50

± 5% output duty (at 1/2VDD)

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30pF output load (3.3V operation)

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Molybdenum-gate CMOS process

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Chip form (CF5019AL

×)

APPLICATIONS

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Crystal oscillator modules (3rd overtone oscillation)

SERIES CONFIGURATION

ORDERING INFORMATION

Version

Recommended operating

Oscillator circuit constants

INHN

input

level

Standby mode

gm ratio

Built-in capacitance Feedback

resistance

Rf [k

Ω]

Damping

resistance

Oscillator

stop

function

Output

state

2.5V operation 3.0V operation

CF5019ALA

60 to 80

60 to 90

0.6

4

7

2.5

200

CMOS

Yes

High

impedance

CF5019ALB

70 to 115

80 to 125

0.8

3

3

4.5

57

CF5019ALC

105 to 135

115 to 145

1.0

1

3

3.3

57

CF5019ALD

110 to 155

135 to 170

1.0

1

5

2.2

57

CF5019ALE

90 to 125

95 to 135

0.8

2

7

3.3

57

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

Device

Package

CF5019AL

×–2

Chip form