an12940aa Panasonic Corporation of North America, an12940aa Datasheet - Page 12

• Manufacturer Part Number: an12940aa
• Description: Audio Signal Processing Ic For Notebook Pc
• Manufacturer: Panasonic Corporation of North America

AN12940AA
■ Terminal Equivalent Circuits (continued)
Pin No.
12
52
7
6
4
3
200 kΩ
96 kΩ
Pin 6,
Pin 52
4
3
Equivalent Circuits
13.1 kΩ
31.7 kΩ
13.1 kΩ
31.7 kΩ
220 kΩ
V
180 kΩ
9 kΩ
V
V
V
9 kΩ
REF
REG
REG
REF
V
(2.25 V)
CC
(4.5 V)
(4.5 V)
(2.25 V)
96 kΩ
(5.0 V)
V
REG
40 kΩ
200 kΩ
(4.5 V)
SDC00044AEB
7
Audio signal on/off changing
It is the control pin which changes
whether to communicate an audio sig-
nal to the amplifier to mix an alarm
signal and an audio signal. At the time
of off, only an alarm audio is output
from the mix amplifier.
The entry impedance: About 105 kΩ
Audio signal input:
It enters a main audio signal.
The entry impedance: About 45 kΩ
PCcard signal entry:
It is the entry pin to enter a signal
from the PCcard. With the audio signal
mix amplifier of the following
paragraph, the same signal is entered
both by L-channel and R-channel.
Also, it has the function which is the
same as the beep entry of pin 56, the
modem entry by pin 54 completely.
The entry impedance: About 45 kΩ
Ripple removal condenser pin
To remove a power ripple with the
regulator circuit to create the inner
power (V
The entry impedance: About 100 kΩ
Pin 52: L-channel entry
Pin 6: R-channel entry
REG
for the regulator:
High: Signal on
Low: Signal off
Description
control pin:
), it puts a condenser.
and Voltage
Corrugation
Open voltage
AC −16 dBV
AC −16 dBV
DC 1.45 V
DC 2.25 V
DC 2.25V
DC 2.25V