M348x Series
UM348x Multi-Instrument Melody Generator
_____________________________________________________________________________
Features
•
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
•
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
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
Symbol
Min.
Typ.
Operating Voltage
Vdd
1.3V
1.5V
Stand-by Current
Isb
-
-
Input Voltage High
Vih
Vdd-0.3V
-
Input Voltage Low
Vil
Vss
-
Input Current High
Iih
1.5µA
3µA
Input Current Low
Iil
-
-
ENV Pin Drive Current
Ienv
-
500µA
Output Current (OP1)
Iol
-
200µA
Output Current (OP2)
Ioh
-
200µA
Max.
5V
12µA
Vdd
Vss+0.3V
6µA
0.1µA
-
1200µA
1200µA
Conditions
No load
Vih=Vdd
Vil =Vss
Venv=0.8V
Vol=0.8V
Voh=0.7V
Playing modes
Program
Mode
CE
SL LP
AS
0
0
X
X
X
Standby
1
1
0
0
0
First melody→...→Last melody→Stop
2
0
0
1
↑
First melody→...→Last melody→Repeat from first melody
3
0
1
0
↑
Start from the present melody→Stop
4
1
0
1
1
Repeat the present melody
5
1
0
0
↑
Change to the next melody→...→Last melody→Stop
6
1
0
1
↑
Next melody→...→Last melody→Repeat from first melody
7
1
1
0
↑
Change to the next melody→Stop
8
1
1
1
↑
Change to the next melody→Repeat the same melody
(
↑
means a low to high voltage level transaction )
1
Song Series List
(Fewer songs version provides longer duration for each song)
M3481
(8 songs)
Jingle Bells
Santa Claus Is Coming To Town
Silent Night, Holy Night
Joy To The World
Rudolph, The Red-nosed Reindeer
We Wish You A Merry Christmas
O Come, All Ye Faithful
Hark, The Herald Angels Sing
M3482
(12 songs)
American Patrol
Rabbits
Oh My Darling, Clementine
Butterfly
London Bridge Is Falling Down
Row, Row, Row Your Boat
Are You Sleeping
Happy Birthday
Joy Symphony
Home Sweet Home
Weigenlied
Melody On Purple Bamboo
M3485
(5 songs)
The Hawaiian Wedding Song
Try To Remember
Aloha OE
Love Story
Yesterday
Pin Configuration
Pin no.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
TSP
CE
LP
SL
AS
NC
ENV
Vss
MTO
OP1
OP2
MT1
NC
OSC2
OSC1
Vdd
Description
Output flag signal of melody auto stop : In normal operation, this should be
open.
Chip is enabled if connected to Vdd. Chip is disabled if connected to Vss.
Only one song plays if connected to Vdd. All songs play if connected to Vss.
A positive going edge will change to play the next song.
The melody will repeat if connected to Vdd and will stop automatically if to Vss.
No connection
Envelope circuit terminal
Negative power supply
Modulated tone signal output
Pre-amplifier output 1
Pre-amplifier output 2
Modulated tone signal input to the pre-amplifier.
No connection
External oscillator terminal 1
External oscillator terminal 2
Positive power supply
2
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