CF1156 series

SEIKO NPC CORPORATION —1

Melody LSIs

OVERVIEW

The CF1156 series are CMOS melody LSIs with built-in LED driver that, together with a battery and piezo-

electric buzzer, operate in one of 3 melody modes determined by input level or bonding options. They also fea-

ture an oscillator stop function in non-play mode and a variable pull-down resistance function that responds to

input levels in order to reduce power consumption, reduce cost, and extend battery life, making them ideal in a

wide range of applications including greeting cards and toys.

FEATURES

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LED direct drive

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Requires few external components

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2.0 to 3.6V wide operating voltage range

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Low power consumption

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3 melody modes (bonding option)

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Oscillator stop function in non-play mode

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Power saving pull-down resistor built-in

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RC oscillator circuit

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Power-ON initialization function

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Chip form

ORDERING INFORMATION

Device

Package

CF1156

Chip form