msm9831 Oki Semiconductor, msm9831 Datasheet - Page 21

• Manufacturer Part Number: msm9831
• Description: Voice Synthesis Lsi With On-chip 384kbit Mask Rom
• Manufacturer: Oki Semiconductor

NOTES
Internal Converter Circuit
The MSM9831 has not employed a voltage output type D/A converter but a current output type D/A converter.
Therefore, the voice output circuit of the MSM9831 is different from that of the MSM6650 family product which
has employed a voltage output type D/A converter. The voice output circuit of the MSM9831 also is different
from that of the MSM9800 family product because the MSM9831 has employed a current flowing-in type D/A
converter and the MSM9800 family product has employed a current flowing-out type D/A converter. (See the
table below)
Ceramic Oscillator
A crystal that is usable in this LSI is described in "Functional Description" of this document. If you want to use
another crystal, it is recommended to evaluate the crystal before using it.
1 Semiconductor
D/A converter
D/A converter
MSM9800 family
MSM6650 family
MSM9800 family
MSM9831
MSM9831
Circuit connection between the MSM9800 family product and amplifier IC
Product name
V
GND
V
GND
DD
DD
Circuit connection between the MSM9831 and amplifier IC
Current flowing direction
Current flowing direction
AOUT
AOUT
Current output (flowing-out) type
Current output (flowing-in) type
D/A converter circuit type
Voltage output type
Resistor for conversion from current to voltage
Resistor for conversion from current to voltage
AMP
AMP
D/A converter output circuit
P-MOS open drain
N-MOS open drain
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MSM9831-xxx
FEDL9831-02
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