msm7577 Oki Semiconductor, msm7577 Datasheet - Page 3

• Manufacturer Part Number: msm7577
• Description: Voice Signal Level Control Lsi
• Manufacturer: Oki Semiconductor

¡ Semiconductor
PIN DESCRIPTION
Pin No.
10
11
12
13
14
15
16
1
2
3
4
5
6
7
8
9
Name
RAUD
TAUD
RCV2
RCV1
ATT0
ATT1
ATT2
ATTE
GND
AN2
AN3
AO3
MIC
V
PD
NC
DD
I/O
—
—
—
O
O
O
O
1
I
I
I
I
I
I
Output pin of transmitting voice.
Receive voice input.
Gain control should be connected by a resistor between AN2 pin RCV2 pin.
Power down control.
Output pin of receiving voice.
Gain control should be connected by a resistor between AN2 and RCV2 pin.
RCV2 signal is opposite phase to RCV1 signal.
Receive voice input.
RCV1 signal is opposite phase to RCV2 signal.
No Connection.
Receive voice input.
Ground (0 V).
Volume control.
Mute signal input.
Gain control and frequency responce control.
Gain control should be controlled by a resistor between AN3 and AO3.
Input pin of Microphone signal.
Gain control and frequency responce control.
Gain control should be controlled by a resistor between AN3 and AO3.
Power supply (+3 V).
H : Power down
L : Power on
H : Mute mode
L : Operating mode
ATT2
0
0
0
0
1
1
1
1
ATT1
0
0
1
1
0
0
1
1
Description
ATT0
0
1
0
1
0
1
0
1
Loss level (dB)
–10 ±0.3
–13 ±0.3
–16 ±0.3
–19 ±0.3
–2 ±0.3
–4 ±0.3
–7 ±0.3
0 ±0.3
MSM7577
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