SM1155 [NPC]

Melody LSIs; 旋律的LSI
SM1155
型号: SM1155
厂家: NIPPON PRECISION CIRCUITS INC    NIPPON PRECISION CIRCUITS INC
描述:

Melody LSIs
旋律的LSI

文件: 总7页 (文件大小:76K)
中文:  中文翻译
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SM1155 series  
Melody LSIs  
NIPPON PRECISION CIRCUITS INC.  
OVERVIEW  
The SM1155 series are CMOS melody LSIs that, together with a battery and piezoelectric buzzer, operate in  
one of 3 melody modes determined by bonding options. They 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  
the hold sound for telephones and toys.  
FEATURES  
Requires few external components  
1.2 to 3.6V wide operating voltage range  
Low power consumption  
PINOUT  
(Top view)  
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  
T2  
T1  
TC  
1
2
3
4
8
7
6
5
Wide pitch dynamic range (G to D )  
3
7
8-pin SOP package  
VDD  
TG  
OUT  
OUT  
ORDERING INFORMATION  
De vice  
Packag e  
VSS  
SM1155×××1S  
SM1155×××2S  
SM1155×××3S  
8-pin SOP  
PACKAGE DIMENSIONS  
(Unit: mm)  
0.695typ  
5.2 0.3  
0 to 10  
1.27  
0.10  
0.4 0.1  
M
0.12  
NIPPON PRECISION CIRCUITS—1  
SM1155 s eries  
PAD DESCRIPTION  
Nu mb e r  
Na me  
T2  
i/o  
Function  
1
2
Test pins (must be open)  
Melody mode control input  
T1  
SM1155×××1S  
SM1155×××2S  
Level hold 1  
Level hold 2  
One-shot  
1
H
3
TG  
ip  
SM1155×××3S  
L/open  
SM1155×××1S/ 2S/ 3S  
Non-play  
4
5
6
7
8
VS S  
OUT  
OUT  
VDD  
TC  
o
Ground  
Piezoelectric speaker driver outputs. Both pins are LOW in non-play mode. OUT is LOW and OUT is HIGH  
during output for a musical rest note. Both pins are HIGH during the gap between musical notes.  
Supply.The rear surface of the chip is V  
level.  
DD  
Test pins (must be open)  
1. Built-in pull-down resistor (the resistance of the pull-down resistor varies with the applied voltage, as described in the Electrical Characteristics).  
SPECIFICATIONS  
Absolute Maximum Ratings  
Parameter  
Supply voltage range  
Symbol  
Condition  
Rating  
Unit  
V
V
V
0.3 to 5.0  
DD  
S S  
Input voltage range  
V
V
0.2 to V + 0.2  
DD  
V
IN  
S S  
Operating temperature range  
Storage temperature range  
T
20 to 80  
°
°
C
C
opr  
T
55 to 125  
stg  
Electrical Characteristics  
T = 25°C, V = 0V, V = 1.5V  
a
SS  
DD  
Rating  
typ  
1.5  
0.01  
25  
Parameter  
Symbol  
Condition  
Unit  
min  
1.2  
ma x  
3.6  
0.3  
50  
Operating voltage  
V
V
µA  
µA  
V
DD  
1
2
Current consumption  
Current consumption  
I
Non-play mode  
Melody modes: OUT, OUT open  
DD1  
I
DD2  
TG LOW -level input voltage  
TG HIGH-level input voltage  
TG LOW -level input current  
TG HIGH-level input current  
V
V
+ 0.2  
IL  
S S  
V
V
– 0.2  
6.0  
6.0  
V
IH  
DD  
I
V
V
= 0.4V  
= 1.5V  
1.4  
1.4  
2.0  
2.0  
–20  
3.0  
3.0  
µA  
µA  
mA  
mA  
%
IL  
IL  
I
IH  
IH  
OUT, OUT LOW -level output current  
OUT, OUT HIGH-level output current  
Internal oscillator frequency  
I
V
= 0.75V  
= 0.75V  
OH  
OL  
OL  
I
V
OH  
f
f
= 50kHz  
+20  
OS C  
0
2. Measurement circuit  
1. Measurement circuit  
VDD  
A
VDD  
A
1.5V  
1.5V  
TG  
VSS  
VSS  
NIPPON PRECISION CIRCUITS—2  
SM1155 s eries  
FUNCTIONAL DESCRIPTION  
Melody Modes  
When TG goes HIGH (V ), melody play starts.  
DD  
Level hold 1 (SM1155×××1S)  
When TG goes HIGH, melody play starts and continues while TG is held HIGH. When TG goes open circuit or  
LOW, melody play stops, even if during mid melody.  
TG  
OUT  
1 TUNE  
REPEAT  
REPEAT  
Oscillator  
Pull-down resistance 135kΩ  
500kΩ  
135kΩ  
(2-pin parallel resistance)  
Level hold 2 (SM1155×××2S)  
When TG goes HIGH, a single melody play starts. Melody play continues until the single melody ends or TG  
goes open circuit or LOW, whichever occurs first.  
TG  
OUT  
1 TUNE  
Oscillator  
270kΩ  
1MΩ  
270kΩ  
1MΩ  
270kΩ  
Pull-down resistance  
NIPPON PRECISION CIRCUITS—3  
SM1155 s eries  
One-shot (SM1155×××3S)  
When TG goes HIGH, a single melody play starts. Melody play continues until the melody ends, even if TG  
goes open circuit or LOW mid melody. However, if the TG input goes HIGH again during melody play, the  
melody play restarts from the beginning.  
TG  
From the begining  
OUT  
1 TUNE  
1 TUNE  
Oscillator  
270k270kΩ  
1M1MΩ  
270kΩ  
270kΩ  
270kΩ  
Pull-down resistance  
1MΩ  
1MΩ  
NIPPON PRECISION CIRCUITS—4  
SM1155 s eries  
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 TG, 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  
IH  
exceed 3.3µA.  
Power-save pull-down resistor  
The resistance of the TG input pull-down resistor changes in response to the input voltage. The pull-down  
resistance is 500kwhen the input is HIGH, and the pull-down resistance is 135kwhen 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  
0
1
2
3
4
5
6
7
Note  
Res t  
ꢁ ꢂ  
ꢃ ꢄ ꢀ  
ꢃ ꢂ  
ꢃ ꢂ ꢂ  
ꢇ ꢂ ꢂ  
ꢈ ꢄ ꢆ  
ꢈ ꢂ  
ꢈ ꢂ ꢂ  
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 SM1155 series devices support 3.5 octaves ranging from G to D , from which 15 notes can be selected to  
3
7
form a scale.  
NIPPON PRECISION CIRCUITS—5  
SM1155 s eries  
TYPICAL APPLICATION  
The circuits below represent the standard connections for SM1155 series devices.  
Piezoelectric buzzer  
Piezoelectric buzzer  
OUT OUT  
OUT OUT  
VDD  
Light  
VDD  
TG VSS  
TG VSS  
Circuit 1  
Circuit 3  
Piezoelectric buzzer  
OUT OUT  
VDD  
TG VSS  
Circuit 2  
NIPPON PRECISION CIRCUITS—6  
SM1155 s eries  
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 specied without further testing or modication.  
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 rst 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  
NC0011AE 2000.08  
NIPPON PRECISION CIRCUITS—7  

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