TECHNICAL DATA
Melody Generator with Accompaniment
FEATURES
•
Two Sound Sources with Envelope (CR Envelope)
•
Melody is inserted up to two.
•
A
ccording to customer’s request, the inserted melody is flexible.
•
3.0V to 5.0V Operating Voltage
•
DC or AC Triggered Performance Start Mode (Mask Selected)
•
Can Drive an 8 Ohm Dynamic Loudspeaker if Provided Externally with
a Transistor
•
Bare chip or 8-pin DIP (Plastic) Package available
BT8048
DESCRIPTION
The BT8048 is a CMOS LSI chip, which plays a prearranged melodies.
ORDERING INFORMATION
BT8048N Plastic
BT8048D SOIC
T
A
= -40° to 85° C for all packages
ABSOLUTE MAXIMUM RATINGS ( T
a
= 25
o
C )
Characteristic
Power Supply Voltage
Input Terminal Voltage
Operating Temperature
Storage Temperature
Soldering Temperature and Time
Symbol
V
DD
V
10
T
a
T
stg
T
sol
Value
- 0.3 to + 7.0
- 0.2 to V
DD
+ 0.2
-40 to + 85 (V
SS
= 1.5V)
- 65 to + 150
260
o
C, 10s (at lead)
Unit
V
V
o
o
C
C
ELECTRICAL CHARACTERISTICS
(V
DD
= 5V, T
a
= 25
o
C; unless otherwise specified)
Characteristic
Operating Voltage
Input Voltage
“1”
“0”
MT Power Supply Time
Response Time
MO OUTPUT PIN EQUIVALENT CIRCUIT
Symbol
V
DD
V
IH
V
IL
Test Condition
Min
3.0
V
DD
- 0.3
V
SS
150
600
Typ
5.0
-
-
Max
5.5
V
DD
V
SS
+ 0.3
ms
ms
Unit
V
V
130k
Main Melody
150k
MO Pin
Accompaniment
Inside of BT8048
Inside of BT8032
1
BT8048
BLOCK DIAGRAM
OSC1
OSC2
OSCILLATOR
RHYTHM
ROM
ACCOMPANMENT
GENERATOR
ENVELOPE
MIXER
ENV1
ENV2
TEMPO ROM
MELODY
ROM
RHYTHM
GENERATOR
B/ E
ENVELOPE
MIXER
MO
MELODY ROM
SEL1
SEL2
MT
CONTROL
ADDRESS
COUNTER
P1
CONTROL ROM
TONE
GENERATOR
DRIVER
OUT1
OUT2
PIN DESCRIPTION
Pin. No.
1
2
3
4
5
6
7
8
Pin Name
OSC1
OSC2
SEL1
V
SS
ENV1
ENV2
MO
V
DD
Pull-Down
Resistor
-
-
Provided
-
-
-
-
-
Functions
A resistor is connected between both terminals to from a ring
oscillator, or external reference signals are applied to OSC1.
For binary selection: this Terminal in Conjunction with SEL1, selects a Melody.
For direct selection: Selects Melody 2 and Controls Start and Stop of it’s
Performance.
Power Supply Terminal (0V).
Connects Resistor and Capacitor to add Envelope to Main Melody.
Connects Resistor and Capacitor to add Envelope to Accompaniment.
Output Terminal or Acoustic Signals that have not been Amplified.
3.0V to 5.0V Operating Voltage
2
BT8048
APPLICATION CIRCUIT (basic external connection)
LINE
OUTC3
C2 R2 C1 R1
VR2
BT8032
BT8048
VR1
•
CR Oscillation, DC Input
RECOMMENDED CONDITIONS FOR EXTERNAL DEVICES
Symbol
VR1
VR2
R1
R2
Ratings
1-2
50
100
100
Unit
MΩ
kΩ
kΩ
kΩ
Symbol
C1
C2
C3
-
Ratings
4.7
4.7
0.1
-
Unit
µF
µF
µF
-
MELODY SELECT TABLE
Switch
Melody
Gong
Bong
Up
Down
SEL1
OFF
ON
OFF
ON
SEL2
OFF
OFF
ON
ON
3
BT8048
N SUFFIX PLASTIC DIP
(MS – 001BA)
A
8
5
B
1
4
Dimension, mm
Symbol
A
B
MIN
8.51
6.1
MAX
10.16
7.11
5.33
0.36
1.14
2.54
7.62
0°
2.92
7.62
0.2
0.38
10°
3.81
8.26
0.36
0.56
1.78
F
L
C
D
C
-T-
SEATING
PLANE
F
G
M
H
J
N
G
D
0.25 (0.010) M
T
K
H
J
K
L
M
N
NOTES:
1. Dimensions “A”, “B” do not include mold flash or protrusions.
Maximum mold flash or protrusions 0.25 mm (0.010) per side.
D SUFFIX SOIC
(MS - 012AA)
Dimension, mm
5
A
8
Symbol
A
B
P
MIN
4.8
3.8
1.35
0.33
0.4
1.27
5.72
0°
0.1
0.19
5.8
0.25
MAX
5
4
1.75
0.51
1.27
H
B
C
1
G
4
C
R x 45
D
F
-T-
D
0.25 (0.010) M T C M
K
SEATING
PLANE
G
J
F
M
H
J
K
M
P
R
8°
0.25
0.25
6.2
0.5
NOTES:
1. Dimensions A and B do not include mold flash or protrusion.
2. Maximum mold flash or protrusion 0.15 mm (0.006) per side
for A; for B
‑
0.25 mm (0.010) per side.
4
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