MSC1157 查看數據表（PDF） - Oki Electric Industry

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MSC1157

Speaker Drive Amplifier

Oki Electric Industry 

¡ Semiconductor

PIN CONFIGURATION (TOP VIEW)

MSC1157

VR 1

8 SEL

AIN

2

SP

3

7 STBY

6 SP

GND 4

5 VCC

8-Pin Plastic DIP

or

8-Pin Plastic SOP

PIN DESCRIPTIONS

Pin Symbol Type

Description

5

VCC — Power supply pin.

4 GND — Ground pin.

2

AIN

I Signal input pin for analog signal inputs, etc.

Digital input pins. Setting these pins configures the standby status. See the table below

for how to set the pins.

7, 8

STBY,

SEL

I

SEL

0

1

Clock

STBY

0

1

Clock

0

1

Clock

0

1

Clock

Status

Operation

Standby

Operation

Standby

Operation

Operation

Operation

Operation

Unstable Operation

Applying a clock between 32kHz and 4MHz to either the STBY or the SEL pin leads the IC

to operation status regardless of the status set at the other pin. Applying clocks to both

of the pins at the same time may cause malfunction.

Refer to the section, RECOMMENDED OPERATING CONDITIONS since clock frequencies

are changed by setting the SEL pin.

Bias output pin for internal circuits. This pin is at GND potential during standby.

1

VR O Connecting a capacitor between VR and the GND pin reduces the pop-up noise at power

on and improves the ripple elimination ratio.

3

SP

O Speaker output pin. This pin outputs a negative phase with respect to the input signal.

6

SP O Speaker output pin. This pin outputs a positive phase with respect to the input signal.

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