CF1155 Datasheet PDF - Nippon Precision Circuits Inc
| Part Number | CF1155 | |
| Description | Melody LSIs | |
| Manufacturers | Nippon Precision Circuits Inc | |
| Logo |  |
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NIPPON PRECISION CIRCUITS INC.
CF1155 series
Melody LSIs
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
s Requires few external components
s 1.2 to 3.6V wide operating voltage range
s Low power consumption
s 3 melody modes (bonding option)
s Oscillator stop function in non-play mode
s Power saving pull-down resistor built-in
s RC oscillator circuit
s Power-ON initialization function
s 2 VSS pad connections
s Wide pitch dynamic range (G3 to D7)
s Chip form
PAD LAYOUT and COORDINATES
(Unit: µm)
VDD OUT OUT
3
TC 4
2
1
(1230,1230)
T2 5
T1 6
11 VSS
7 8 9 10
(0,0) VSS TO OSH LH
Chip size: 1.23 × 1.23mm
Chip thickness: 300 ± 30µm
T1, T2, TC, and TO bonding is not required.
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
ORDERING INFORMATION
Device
CF1155
Package
Chip form
NIPPON PRECISION CIRCUITS—1
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CF1155 series
Power-save Function
As shown in the preceding timing diagrams, the oscillator stops during non-play mode and the pull-down resis-
tance value changes in response to both HIGH-level and LOW-level inputs (power-save pull-down resistor) to
reduce power consumption and extend battery life.
Non-play oscillator stop function
When melody play ends, regardless of the state of either LH or OSH, the internal oscillator stops and is placed
in a standby state. In this state, the current consumption, including input pin pull-down resistor current (IIH
max), does not exceed 3.3µA.
Power-save pull-down resistor
The resistance of the OSH and LH input pull-down resistor changes in response to the input voltage. The pull-
down resistance is 1MΩ when the input is HIGH, and the pull-down resistance is 270kΩ when the input is
LOW.
Furthermore, if a light-dependent resistor (CdS) cell is employed as a switch (the pull-down resistance is max-
imum when the CdS resistance is minimum (light) and the pull-down resistance is minimum when the CdS
resistance is maximum (dark)), the combined resistance can be increased, decreasing current consumption.
Musical Specifications
Maximum program steps
A maximum of 64 steps can be programmed into internal mask-programmable ROM. Each step represents
either a note (sound pitch and length), a rest note, or a jump. The maximum number of jumps is 7.
Note length (including rests)
Eight rhythm values, from sixteenth note to half note, for notes and rests can be programmed, as shown in the
following table.
Code
Type
01234567
Note
Rest
Also, notes and rests longer than half notes and rests can be created using a tie to connect the notes. This
requires 2 program steps in ROM.
Tempo
The tempo for the standard quarter note can be selected from the following 16 options.
Code 0 1 2 3 4 5 6 7 8 9 A B C D E F
= 697 348 232 174 139 116 99.4 87 77.3 69.6 63.3 58 53.5 49.7 46.4 43.5
Pitch and scale
The CF1155 series devices support 3.5 octaves ranging from G3 to D7, from which 15 notes can be selected to
form a scale.
NIPPON PRECISION CIRCUITS—5
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for CF1155 electronic component. |
| Information | Total 7 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ CF1155.PDF Datasheet ] | |
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