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CF1155 series
NIPPON PRECISION CIRCUITS INC.
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. The y also feature 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
■
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
■
RC oscillator circuit
■
Power-ON initialization function
■
2 V
pad connections
SS
■
Wide pitch dynamic range (G
■
Chip form
to D
3
)
7
PAD LAYOUT and COORDINATES
(Unit: µm)
VDD
TC
T2
T1
(0,0)
OUT OUT
23
4
5
6
78910
HA1155
VSS
TO OSH
Chip size: 1.23 × 1.23mm
Chip thickness: 300 ± 30µm
T1, T2, T C , and TO bonding is not required.
1
11
LH
ORDERING INFORMATION
De vice Pack ag e
CF1155 Chip form
(1230,1230)
VSS
Number Pad X Y
1 OUT 930 1075
2 OUT 529 1075
3 V DD 155 1075
4 TC 155 887
5 T2 155 608
6 T1 155 420
7 VS S 223 155
8 TO 486 155
9 O SH 750 155
10 LH 1041 155
11 VS S 1075 420
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−
−
−
−
°
−
° C
∆
∆
CF1155 series
PAD DESCRIPTION
Name Function
OSH, LH
OUT, OUT
VD D Supply. The rear surface of the chip is V
Melody mode control inputs. Built-in pull-down resistors mean LOW-level signals are obtained when inputs are open circuit. The
resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics.
Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and OU T is HIGH dur ing output for a
musical rest note. Both pins are HIGH during the gap between musical notes.
level.
DD
VS S Ground
T1, T2, T C Test inputs. Pull-down resistor built-in.
TO Test output. The oscillator frequency (typ. 50kHz) is output for monitoring pur poses.
SPECIFICATIONS
Absolute Maximum Ratings
Parameter Symbol Condition Rating Unit
Supply voltage range V
Input voltage range V
Operating temperature range T
Storage temperature range T
Electrical Characteristics
T
= 25 ° C, V
a
Operating voltage V
Current consumption
Current consumption
LH, OSH LOW-level input voltage V
LH, OSH HIGH-level input voltage V
LH, OSH LOW-level input current I
LH, OSH HIGH-level input current I
OUT, OUT L OW -level output current I
OUT, OUT HIGH-level output current I
TO oscillator frequency f
TO frequency stability (relative to
voltage)
TO oscillator start voltage V
TO oscillator stop voltage V
1. Measurement circuit
= 0V, V
SS
DD
= 1.5V
Parameter Symbol Condition
1
2
DD
DD
I
DD1
I
DD2
IL
IH
OL
OH
OSC
f/f
f/f
DOB
DOS
IN
opr
stg
V
SS
0.3 to 5.0 V
V
SS
0.2 to V
+ 0.2 V
DD
20 to 80
65 to 150
Rating
min typ max
1.2 1.5 3.6 V
Non-play mode – 0.01 0.3 µ A
Melody modes: OUT, O U T open – 25 50 µA
IL
IH
V
= 0.4V 0.7 1.5 3.0 µ A
IL
V
= 1.5V 0.7 1.5 3.0 µ A
IH
V
= 0.75V 2.0 – – mA
OL
V
= 0.75V 2.0 – – mA
OH
––V
V
– 0.2 – – V
DD
SS
35 50 65 kHz
V
1
2
= 1.2 to 2.0V – 1 – %/0.1V
DD
V
> 2.0V – 2 – %/1V
DD
– – 1.2 V
– – 1.2 V
2. Measurement circuit
C
Unit
+ 0.2 V
1.5V
VDD
A
VSS
1.5V
VDD
A
LH VSS
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CF1155 series
FUNCTIONAL DESCRIPTION
Melody Modes
The CF1155 series melody mode is determined by the bonding options and levels on the mode control inputs
OSH and LH. When either OSH or LH or both go HIGH (V
shown in the following table.
OS H LH Melody mode
HIGH HIGH Level hold 1
LOW HIGH Level hold 2
HIGH LOW One-shot
LO W LO W Non-play
Level hold 1
), the corresponding melody mode is selected as
DD
When both OSH and LH go HIGH, melody play starts and continues while both are held HIGH. When both
inputs go open circuit or LOW, melody play stops, even if during mid melody.
Note that both OSH and LH inputs should be switched simultaneously using a single switch. If there is timing
difference between the two inputs, then LH has priority.
OSH
LH
OUT
1 TUNE
Oscillator
Pull-down resistance
(2-pin parallel resistance)
REPEAT REPEAT
500kΩ135kΩ 135kΩ
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CF1155 series
Level hold 2
When LH goes HIGH, a single melody play starts. Melody play continues until the single melody ends or LH
goes open circuit or LOW, whichever occurs first.
LH
OUT
1 TUNE
Oscillator
Pull-down resistance
1MΩ270kΩ
270kΩ 1MΩ 270kΩ
One-shot
When OSH goes HIGH, a single melody play starts. Melody play continues until the melody ends, even if OSH
goes open circuit or LOW mid melody. However, if the OSH input goes HIGH again during melody play, the
melody play restarts from the beginning.
OSH
OUT
Oscillator
1 TUNE
1 TUNE
From the begining
Pull-down resistance
270kΩ
1MΩ
270kΩ
1MΩ
270kΩ 270kΩ
1MΩ 1MΩ
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270kΩ
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q
CF1155 series
Power-save Function
As shown in the preceding timing diagrams, the oscillator stops during non-play mode and the pull-down resistance 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 (I
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 pulldown resistance is 1M Ω when the input is HIGH, and the pull-down resistance is 270k Ω when the input is
LOW.
Furthermore, if a light-dependent resistor (CdS) cell is employed as a switch (the pull-down resistance is maximum 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.
IH
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.
Type
Note
Rest
01234567
x e e . q q + x q . q . . h
Å ä ä . . g g + Å g . g . .
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
Code 0123456789ABCDEF
= 697 34 8 232 17 4 139 116 99.4 8 7 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 G
to D
, from which 15 notes can be selected to
3
7
form a scale.
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CF1155 series
TYPICAL APPLICATION
The circuits below represent the standard connections for CF1155 series devices.
VDD
VSS
VDD
VSS
Piezoelectric buzzer
OUT
OUT
OSH LH VSS
Circuit 1
Piezoelectric buzzer
OUT
OUT
OSH LH VSS
Light
VDD
VSS
Circuit 3
Piezoelectric buzzer
OUT
OUT
OSH LH VSS
Circuit 2
Note 1: There are 2 V
Note 2: Circuit 1 is fo r one-shot mode, circuit 2 for lev e l hold 1/2 modes, and circuit 3 for CdS connection.
pads, and either pad can be used.
SS
The bonding options for the above circuits is shown in the following table.
OS H LH Melody mode
Yes Yes L evel hold 1
Yes Level hold 2
Yes One-shot
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CF1155 series
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to
improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for
the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits
are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision
Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification.
The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or
malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter,
including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or
indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies.
NIPPON PRECISION CIRCUITS INC.
4-3, Fukuzumi 2-chome
Koto-ku, Tokyo 135-8430, Japan
NIPPON PRECISION CIRCUITS INC.
Telephone: 03-3642-6661
Facsimile: 03-3642-6698
NC9922AE 2000.05
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