
CF1155 series
Melody LSIs
NIPPON PRECISION CIRCUITS—1
NIPPON PRECISION CIRCUITS INC.
OVERVIEW
The CF1155 series are CMOS melody LSIs that, together with a battery and piezoelectric buzzer, operate in
one of 3 melody modes determined by input level or bonding options. They also feature an oscillator stop func-
tion 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 applica-
tions including greeting cards and toys.
FEATURES
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Requires few external components
1.2 to 3.6V wide operating voltage range
Low power consumption
3 melody modes (bonding option)
Oscillator stop function in non-play mode
Power saving pull-down resistor built-in
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RC oscillator circuit
Power-ON initialization function
2 V
SS
pad connections
Wide pitch dynamic range (G
Chip form
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3
to D
7
)
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PAD LAYOUT and COORDINATES
(Unit: μm)
ORDERING INFORMATION
Chip size: 1.23
Chip thickness: 300 ± 30μm
T1, T2, TC, and TO bonding is not required.
×
1.23mm
VDD
(0,0)
(1230,1230)
1
H
2
3
4
5
6
7
8
9
10
11
OUT
OUT
TC
T2
T1
VSS TO OSH
LH
VSS
Number
Pad
X
Y
1
OUT
930
1075
2
OUT
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
CF1155
Chip form