MSM7557 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM7557

Single Chip MSK Modem with Compandor for Cordless Telephone

Oki Electric Industry 

¡ Semiconductor

MSM7557

Application Circuit

MSM7557GS-2K

Transmit data

SD

Transmit data timing clock

ST

Emphasis path select

EMP

Limiter circuit

clamp voltage input

LIM

Transmit

voice input

R1

R2

C19

R5

VR1

VR2

VR3

CMPI

TVIO

C1 R3

C2

C3

TVI

R4

C4

C5

C6

Dynamic range

select

CC1

CC2

CC3N

CC3P

DYN

SG

C8

C7

GND

VDD

C9

Transmit signal output

TAO

Receive voice output

C10

RVO

TVE

Transmit voice output control

ME

MSK modulator control

C20

X2

3.6864 MHz

X1

C21

PDN

Power down control

VDD +

–

RVE

Power supply

C14

Receive voice output control

RT

Receive timing clock

RD

Receive data

FD

Frame synchronous

detector output

FPS

Synchronous pattern select

BIT

Bit synchronus

detector control

FDE

Frame synchronous detector

control

BR

Modem data signaling rate select

BYP

Compandor path select

RCK1

RCK2

Voice band select

CE1

C11

CE2

C12

CE3N

C13

CE3P

SEC

CSH + –

C15

RAI

C16

RAIO

R6

R8

R7

C17

Note : An arrow mark of ( ) indicates connection to the SG pin.

C18

Receive

signal input

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