msm7557 Oki Semiconductor, msm7557 Datasheet - Page 19

• Manufacturer Part Number: msm7557
• Description: Single Chip Msk Modem With Compandor For Cordless Telephone
• Manufacturer: Oki Semiconductor

¡ Semiconductor
Application Circuit
Transmit signal output
Transmit
voice input
Receive voice output
Transmit data timing clock
Note : An arrow mark of ( ) indicates connection to the SG pin.
Emphasis path select
Limiter circuit
clamp voltage input
C1
Transmit data
R3
C2
C8
Dynamic range
select
V
C13
DD
C10
C9
R4
R5
C3
R1
R2
C11
C12
C7
C4
C5
C6
C19
EMP
GND
DYN
RVO
LIM
VR1
VR2
VR3
CC1
CC2
TAO
CE1
CE2
CMPI
TVIO
TVI
CC3N
CC3P
CE3N
CE3P
SD
SG
ST
MSM7557GS-2K
RCK1
RCK2
RAIO
PDN
VDD
RVE
BYP
CSH
TVE
FPS
FDE
SEC
RAI
ME
RD
X2
X1
RT
FD
BIT
BR
+
–
+
C15
C16
–
C20
C21
C14
Power down control
Power supply
Receive voice output control
Receive timing clock
Receive data
Frame synchronous
detector output
Synchronous pattern select
Bit synchronus
detector control
Compandor path select
Modem data signaling rate select
Frame synchronous detector
control
Transmit voice output control
MSK modulator control
R6
R7
3.6864 MHz
Voice band select
C17
R8
C18
MSM7557
Receive
signal input
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