¡ Semiconductor
MSM7507-01/02/03
APPLICATION CIRCUIT
Analog interface
Digital interface
+5 V
MSM7507
1:1
1:1
51 kW
0.1 mF
AIN–
PCMOUT
PCM signal output
Analog input
600 W
XSYNC
RSYNC
BCLK
8 kHz SYNC signal input
GSX
AIN+
SG
PCM shift clock input
PCM data input
300 W
300 W
AOUT+
PCMIN
PDN
Analog output
600 W
AOUT–
PWI
Power Down control input
VFRO
SGC
AG
51 kW
0.1 mF
0 V
DG
–
+
10 mF
0–20W
1 mF
+5 V
VDD
FREQUENCY CHARACTERISTICS ADJUSTMENT CIRCUIT
Microphone amp
C1
Transmit frequency
characteristic
Adjustment determined with
C1, C2, R1, R2
R1
M
AIN–
C2
R2
GSX
AIN+
SG
Receive frequency
characteristic
Adjustment determined with
C3, C4, R3, R4
AOUT+
AOUT–
R5
R4
C4
PWI
VFRO
R3 C3
15/18
OKI [ OKI ELECTRONIC COMPONETS ]
