Dear customers,
About the change in the name such as "Oki Electric Industry Co. Ltd." and
"OKI" in documents to OKI Semiconductor Co., Ltd.
The semiconductor business of Oki Electric Industry Co., Ltd. was succeeded to OKI
Semiconductor Co., Ltd. on October 1, 2008.
Therefore, please accept that although
the terms and marks of "Oki Electric Industry Co., Ltd.", “Oki Electric”, and "OKI"
remain in the documents, they all have been changed to "OKI Semiconductor Co., Ltd.".
It is a change of the company name, the company trademark, and the logo, etc. , and
NOT a content change in documents.
October 1, 2008
OKI Semiconductor Co., Ltd.
550-1 Higashiasakawa-cho, Hachioji-shi, Tokyo 193-8550, Japan
http://www.okisemi.com/en/
E2D0049-39-21
¡ Semiconductor
¡ Semiconductor
MSA180
Piezo Speaker Amplifier
This version: Feb. 1999
MSA180
Previous version: May. 1997
GENERAL DESCRIPTION
The MSA180 is a piezo speaker driver for OKI's speech synthesizers. Its voltage gain can be adjusted
by a factor of up to 10. The differential output provides an amplitude of twice the voltage supply.
A separate output connects to the base of an external transistor for controlling system voltage.
A standby function eliminates power loss when no input signal is present.
FEATURES
• Power supply voltage
: 2.0 V to 6.0 V (single supply voltage)
• Low current consumption
: 4.2 mA typ (V
CC
=3 V, no load)
• Standby current
: <1
mA
• Differential output
: Twice the supply voltage (maximum output
amplitube)
• Package options :
8-pin plastic DIP (DIP8-P-300-2.54) (Product name: MSA180RS)
8-pin plastic SOP (SOP8-P-250-1.27-K) (Product name: MSA180MS-K)
Chip
BLOCK DIAGRAM
BASE
2.2 kW
V
CC
MODE1
MODE2
V
CC
V
CC
Logic
+
–
+
18 kW
–
A
V
=20
SP
1.3 kW
A
IN
A
V
=20
SP
GND
6.6 kW
6.6 kW
1/16
¡ Semiconductor
MSA180
PIN CONFIGURATION (TOP VIEW)
MODE2 1
A
IN
2
GND 3
SP
4
8 MODE1
7 BASE
6 V
CC
5 SP
8-Pin Plastic DIP or 8-Pin Plastic SOP
PIN DESCRIPTIONS
Pin
6
3
2
Symbol
V
CC
GND
A
IN
Type
—
—
I
Power supply pin.
Ground pin.
Voice signal input pin.
This pin switches the device between operation and standby modes.
8
MODE1
I
The IC is in operation mode if V
IH
> 1.0 V on the MODE1 pin and is in
standby mode if V
IL
< 0.3 V on the MODE1 pin. When MODE1 is used,
MODE2 must be connected to V
CC
.
This pin switches the device between operation and standby modes.
1
MODE2
I
The IC is in operation mode if V
IL
< V
CC
–1.0 V on MODE1 pin and is in
standby mode if V
IH
> V
CC
–0.3 V on MODE1 pin. When MODE2 is used
MODE1 must be connected to GND.
This pin is connected to the base of an external transistor. If an
7
BASE
O
external transistor is not used to control system voltage, this pin must
be left open.
4
5
SP
SP
O
O
This is a speaker output pin that provides signals with the same phase
as the input.
This is a speaker output pin that provides signals with an inverted
phase to the input.
Description
2/16
¡ Semiconductor
MSA180
ABSOLUTE MAXIMUM RATINGS
(Ta=25°C unless otherwise specified)
Parameter
Power Supply Voltage
Symbol
V
CC
Condition
—
Rating
–0.3 to +6.5
Unit
V
Remarks
—
A
IN
Input Voltage
V
IN
—
–0.3 to V
CC
+0.3
V
MODE1
MODE2
BASE
Maximum Output Current
Power Dissipation
Junction Temperature
Storage Temperature
I
OMAX
P
D
T
jMAX
T
STG
V
CC
=3 V
Ta=25°C
—
—
±80
400
340
110
–55 to +150
mA
mW
mW
°C
°C
SP,
SP
DIP type
SOP type
Chip
—
RECOMMENDED OPERATING CONDITIONS
Parameter
Power Supply Voltage
Load Impedance
Peak Load Current
"H" Input Voltage
"L" Input Voltage
Operating Temperature
Symbol
V
CC
Z
L
I
O-P
V
IH1
V
IH2
V
IL1
V
IL2
T
op
Condition
—
—
—
Applied to MODE1 pin
Applied to MODE2 pin
Applied to MODE1 pin
Applied to MODE2 pin
Min.
2.0
200
—
1.0
V
CC
–0.3
—
—
–40
Max.
6.0
—
±30
—
—
0.3
V
CC
–1.0
+85
Unit
V
W
mA
V
V
V
V
°C
—
3/16
¡ Semiconductor
MSA180
ELECTRICAL CHARACTERISTICS
(Ta=25°C, V
CC
=2 V to 6 V unless otherwise specified)
Parameter
Voltage Gain
A
IN
Input Resistance
Output DC Voltage
Output DC Offset Voltage
SP,
SP
Output "H" Voltage
SP,
SP
Output "L" Voltage
*1
*2
Symbol
A
V1
A
V2
A
V3
R
IN
V
O
DV
O
V
OH
V
OL
No signal
SP-SP
Condition
A
IN
ÆSP
A
IN
ÆSP
A
IN
Æ(SP-SP)
—
V
CC
=2 V
V
CC
=6 V
V
CC
=2 V
V
CC
=6 V
Min.
4.25
4.25
8.5
17.2
0.7
2.5
—
—
V
CC
–0.25
—
Typ.
5
5
10
24.6
1.0
3.5
—
—
—
—
Max.
5.75
5.75
11.5
32.0
1.3
4.6
0.2
0.6
—
0.25
Unit
V/V
V/V
V/V
kW
V
V
V
V
V
V
I
OUT
=–10 mA
I
OUT
=10 mA
V
CC
=3 V
Z
L
=•
BASE=Open
MODE1=MODE2=GND
or
MODE1=MODE2=V
CC
A
IN
=Open
Operating Current
I
CC
—
4.2
6.2
mA
Circuit Current in Standby Mode
I
CCS
MODE1=GND
MODE2=V
CC
V
CC
=2 V
V
CC
=6 V
MODE1=V
CC
MODE2=V
CC
MODE1=GND
MODE2=GND
V
CC
=2 V
BASE=V
CC
V
CC
=6 V
BASE=V
CC
—
0.18
0.52
—
—
–1
–160
0.4
1.6
—
0.26
0.74
—
—
—
—
—
—
1
0.34
0.96
160
1
—
—
—
—
µA
V
V
µA
µA
µA
µA
mA
mA
A
IN
Input DC Bias Voltage
MODE1 "H" Input Current
MODE2 "H" Input Current
MODE1 "L" Input Current
MODE2 "L" Input Current
*3
V
AIN
I
IH1
I
IH2
I
IL1
I
IL2
I
BO1
Base Output Current
I
BO2
*1 Typical value is V
O
= V
CC
¥
0.625 – 0.25.
*2 Maximum value is
DV
O
= V
CC
¥
0.1.
*3 Typical value is V
AIN
= V
CC
¥
0.12 + 0.02.
4/16
