CF1156 series

NIPPON PRECISION CIRCUITS INC.—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

PAD LAYOUT and COORDINATES

(Unit:

µm)

ORDERING INFORMATION

Chip size: 1.23

× 1.23mm

Chip thickness: 300 ± 30µm

T1, T2, TC, and TO bonding is not required.

VDD

(0,0)

(1230,1230)

1

2

3

4

5

6

78

9

10

11

LO

BO

TC

T2

T1

VSS TO OSH

LH

VSS

Number

Pad

X

Y

1

BO

930

1075

2

LO

529

1075

3

VDD

155

1075

4

TC

155

887

5

T2

155

608

6

T1

155

420

7

VSS

223

155

8

TO

486

155

9

OSH

750

155

10

LH

1041

155

11

VSS

1075

420

Device

Package

CF1156

Chip form