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TECHNICAL DATA
SIMPLE MELODY GENERATOR
BT8028-XX
FEATURES

127-note ROM memory
1.3V to 3.3V power supply and
low power consumption
RC oscillator on chip
One shot or level hold mode
Sound range: 4 octaves, 2
series
Tempo: 16 kinds (presto-
largo)
Direct piezo drive
FUNCTIONS

Solution of automatic stop or repeat of the
melody
Dynamic speaker can be driven with external
NPN transistor
Two or three times repeat of melody (mask
option)
Each note can be individually programmed to
be staccato or legato (mask option)
Changing the contents of melody is possible
by reprogramming the maskable ROM
Power on reset; melody begins from the first
note
Start from the head of melody
Bare chip or TO-92 are available
BT8028C-
XXL(S)
OUT
V
CC
V
SS
DESCRIPTION
The BT8028 is a CMOS LSI chip which electronically plays a prearranged melody. Selection of melody start signal is
possible by mask option: orders specification suffix "L" indicate Level Hold Mode, and suffix "S" indicate One Shot
Mode. The Universal version (as One Shot or Level Hold Mode) is possible also (suffix "U").
ABSOLUTE MAXIMUM RATINGS (Ta = 25
o
C)
Characteristic Symbol
Value
Unit
DC Supply Voltage
V
CC
- V
SS
-0.3 ~ 3.5
V
Input Voltage
V
IN
V
SS
- 0.3 ~ V
CC
- 0.3
V
Operating Temperature
T
opr
-20 ~ +65
o
C
Storage Temperature
T
stg
-55 ~ +125
o
C
ELECTRICAL CHARACTERISTICS
(T
a
= 25
o
C, V
CC
= 1.5V ; unless otherwise specified)
Characteristic Symbol
Test
Condition Min
Typ
Max
Unit
Operating Voltage
V
CC
1.3 1.5 3.3 V
Supply Current
Stand-by
I
S
0.1
1
Operating
I
CC
Output open
60
A
Output Drive Current
I
OH
V
CC
=1.3V, V
O
=0.8V
0.6
1.5
mA
Output Sink Current
I
OL
V
CC
=1.3V, V
O
=0.5V
0.6
1.5
mA
Frequency Stability
F/F
F
OSC
(1.6V) - F
OSC
(1.3V)
12 %
F
OSC
(1.3V)
1
BT8028-xx
APPLICATION CIRCUITS
LEVEL HOLD
1
2
3
4
5
6
7
M T
TEST
OSC
V
SS
V
CC
BD
BDN
1.5V
or 3.0V
+
-
K 1
1
2
3
4
5
6
7
MT
TEST
OSC
V
SS
V
CC
BD
BDN
1.5V
or 3.0V
+
-
K 1
ONE SHOT
1
2
3
4
5
6
7
MT
TEST
OSC
V
SS
V
CC
BD
BDN
1.5V
or 3.0V
+
-
K 1
1
2
3
4
5
6
7
MT
TEST
OSC
V
SS
V
CC
BD
BDN
1.5V
or 3.0V
+
-
K1
TO-92 ONE SHOT OR LEVEL HOLD MODE CHIP FORM
2
BT8028-xx
FOR SPEAKER FOR PIEZO
1.5 V
-
+
-
+
V
SS
V
DD
R = 50
1.5 V
-
+
-
+
V
SS
V
DD
PI EZO
AVAILABLE SONG LIST
NEW
EXT
SONG
LIST SEC
1
BT8028C-001
For Elise
13
2 BT8028C-002 Staff
WRK
20
3 BT8028C-003 Happy
Birthday
13
4 BT8028C-004 Jingle
Bell
12
5
BT8028C-005
It's Small World
21
6
BT8028C-006
3 Children Song
13
7 BT8028C-007 Cuocoo
Waltz
10
8
BT8028C-008
London Bridge is Falling Down
16
9
BT8028C-009
Trains Running Fast
11
10
BT8028C-010
Love Me Tender Love Me True
38
11
BT8028C-011
Love Story
23
12
BT8028C-012
Old McDonald Had a Farm
25
13
BT8028C-013
Jingle Bell (Santa Claus Is Coming to Town)
28
14
BT8028C-014
You are My Sunshine
12
15
BT8028C-015
Santa Claus is Coming To Town
20
16 BT8028C-016 Silent
Night
26
17
BT8028C-017
Twinkle Twinkle Little Star
14
18 BT8028C-018 Korean
melody
29
19
BT8028C-019
Phone ringer
3
20
BT8028C-020
Three Little Pigs
18
21
BT8028C-021
MNA
38
22 BT8028C-022 NOV24
(Cuckoo
Waltz)
20
23 BT8028C-023 Home
Sweet
Home
39

3
BT8028-xx
4

NEW
EXT
SONG
LIST SEC
24 BT8028C-024 Cuckoo
Waltz
2
18
26 BT8028C-026 AZ1
44
27 BT8028C-027 Seven
forty
28
28 BT8028C-028 AZ3
24
29 BT8028C-029 AZ4
26
30
BT8028C-030
IR1
34
31 BT8028C-031 Ginm
Petersburg
53
32
BT8028C-032
Hymn of Russia
55
33 BT8028C-033 My
Moscow
27
34
BT8028C-034
Home Sweet Home (Ver2, Shot)
32
35 BT8028C-035 Sound generator + Led driver
2 Hz
36 BT8028C-036 Varvara
19
43 BT8028C-043 Alexandra
45
44
BT8028C-044
IR2
27
45 BT8028C-045 For
Elise
2
15
46
BT8028C-046
God Bless America
48
49
BT8028C-049
Gimn USA
64
50 BT8028C-050 Reg
Time
20
51
BT8028C-051
It's Small World 2
21
52
BT8028C-052
AZ4-2
21
53
BT8028C-053
Car Alarm
10
57
BT8028C-057
Sound generator + Led driver
4 Hz
59
BT8028C-059
Day dream (Shuman)
67
60 BT8028C-060 Victory
day
44
62 BT8028C-062 Oh!
fighting
Korea
34
63 BT8028C-063 Champion
24
64 BT8028C-064 March
32
67 BT8028C-067 Air
Tale
20
70 BT8028C-070 Hymn
of
Ukraine
55
71 BT8028C-071 Metal
67
72 BT8028C-072 Pong






BT8028-xx

TO-92






5