msm7577 Oki Semiconductor, msm7577 Datasheet - Page 7

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

Transmit voice data
¡ Semiconductor
In the Reverse Type
In the Same Phase Type
APPLICATION CIRCUIT
Receive voice data
Analog input
R1
C5
Analog input
R2
R3
C1
C8
R6
C3
C6
C7
R4
R5
C9
1
2
3
4
5
6
7
8
TAUD
AN2
PD
RCV2
RCV1
NC
RAUD
GND
MSM7577MS-K
AO3
MIC
AN3
AO3
AN3
MIC
–
+
–
+
ATTE
ATT2
ATT1
ATT0
AO3
AN3
MIC
V
DD
16
15
14
13
12
11
10
9
C4
+3 V
C2
C1
R5 > 10 kW
R6 > 10 kW
C7 > 0.1 µF
C8 > 1 µF
C9 = 10 pF
Gain = 1 + (R5/R6)
R3 > 10 kW
R4 > 10 kW
C5 > 1 µF
C6 = 50 pF
Gain = R4/R3
MSM7577
R1 > 30 kW
R2 > 30 kW
C1 = 0.1 µF
C2 = 1 µF
C3 = 50 pF
C4 = 10 pF
Gain = R2/R1
7/8