WF5028 series

SEIKO NPC CORPORATION —1

0.8V operation Crystal Oscillator Module ICs

OVERVIEW

The WF5028 series are miniature crystal oscillator module ICs. The devices are fabricated using a proprietary

low voltage process, enabling 0.8V operation. The pad layouts are selective from 3 types depending on pack-

age structures, mounting methods, which are suitable for miniature crystal oscillators. The WF5028 series can

be used to realize ultra miniature, ultra low voltage crystal oscillators.

FEATURES

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Wide range of operating supply voltage: 0.8 to 2.0V

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Optimized low crystal drive current oscillation for

miniature crystal units

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3 pad layout options for mounting

• WF5028A

× series: for Flip Chip Bonding

• CF5028B

× series: for Wire Bonding (type I)

• CF5028C

× series: for Wire Bonding (type II)

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Recommended oscillation frequency range:

20MHz to 50MHz

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Multi-stage frequency divider for low-frequency

output support: 0.75MHz (min)

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Frequency divider built-in

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−40 to 85°C operating temperature range

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Standby function

• High impedance in standby mode, oscillator

stops

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CMOS output duty level (1/2VDD)

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50 ± 5% output duty

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15pF output drive capability

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Wafer form (WF5028

××)

Chip form (CF5028

××)

APPLICATIONS

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3.2

× 2.5, 2.5 × 2.0, 2.0 × 1.6 size miniature crystal oscillator modules

ORDERING INFORMATION

Device

Package

WF5028

××–4

Wafer form

CF5028

××–4

Chip form