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Features
General Description
The M3481 series is a mask-ROM-programmed multi-instrument melody generator , implemented by
CMOS technology. It is designed to play the melody according to the previously programmed
information
and is capable of generating 16 songs with 3 instrument effects : piano, organ and mandolin. The
device
also includes a pre-amplifier which provides a simple interface to the driver circuit. The M3481 series is
intended for applications such as toys, door bells, music box, melody clock/timers and telephones.
Absolute Maximum Ratings
DC Supply Voltage .......................................... -0.3V to +5.0V
Input Voltage Range ....................................... Vss-0.3V to Vdd+0.3V
Operating Ambient Temperature .................... 0 C to +70 C
Storage Temperature ....................................... -10 C to +125 C
Electrical Characteristics
(Vss=0V, Vdd=1.5V, Ta=25 C, unless otherwise specified.)
Parameter
Operating Voltage
Stand-by Current
Input Voltage High
Input Voltage Low
Input Current High
Input Current Low
ENV Pin Drive Current
Output Current (OP1)
Output Current (OP2)
Playing modes
Mode
0
1
2
3
4
5
6
7
8
(
Powered by a 1.5V battery
Low standby current
512-note memory, up to 16 songs
8 playing modes by user setting
One built-in RC oscillator
means a low to high voltage level transaction )
CE
0
1
1
1
1
1
1
SL
X
0
0
0
0
LP
X
0
0
1
1
0
0
1
1
Symbol
Vdd
Vih
Vil
Isb
Iih
Iil
Ienv
Iol
Ioh
AS
X
0
1
0
1
0
1
0
1
UM348x Multi-Instrument Melody Generator
Program
Standby
First melody ... Last melody Stop
First melody ... Last melody Repeat from first melody
Start from the present melody Stop
Repeat the present melody
Change to the next melody ... Last melody Stop
Next melody ... Last melody Repeat from first melody
Change to the next melody Stop
Change to the next melody Repeat the same melody
Min.
1.3V
Vdd-0.3V
Vss
1.5 A
500 A
200 A
200 A
-
-
8 beats selectable
3 timbres - piano, organ, and mandolin
5 tempos available through mask setting
14 tones selectable
On-chip envelope modulator and pre-amplifier
1
Typ.
1.5V
3 A
-
-
-
-
-
-
-
Max.
12 A
Vdd
Vss+0.3V
6 A
0.1 A
1200 A
1200 A
5V
-
M348x Series
Conditions
No load
Vih=Vdd
Vil =Vss
Venv=0.8V
Vol=0.8V
Voh=0.7V