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MC34118

VOICE SWITCHED SPEAKER PHONE CIRCUIT

Contek Microelectronics 

MC34118

LINEAR INTEGRATED CIRCUIT

ELECTRICAL CHARACTERISTICS(referred to fig. 1)

PARAMETER

SYMBOL

TEST

MIN

CONDITIONS

SUPPLY VOLTAGES

V+ Supply Current

Icc

Vcc=6.5V, CD=0.8V

Vcc=6.5V, CD=2V

CD Input Resistance

RCD

Vcc=VCD=6.5V

50

CD Input Voltage(High)

VCDH

2

CD Input Voltage

VCDL

VB Output Voltage

VB

Vcc=3.5V

Vcc=5V

1.8

VB Output Resistance

ROVB

IVB=1mA

VB Power Supply Rejection Ratio

PSRR

CVB=220mF,

f=1kHz

ATTENUATORS

Receive Attenuator Gain(f=1kHz, VLC=VB)

Rx Mode, RXI=150mVrms

GRX

Vcc=5V

4

Rx Mode, RXI=150mVrms

GRX

Vcc=3.5V

4

Gain Change

DGRX1

Vcc=3.5V vs.

-0.5

Vcc=5V

AGC Gain Change

DGRX2

Vcc=3.5V vs.

Vcc=5V

Idle Mode, RXI=150mVrms

GRXI

-22

Rx to Tx Mode Range

DGRX3

49

Volume Control Range

VCR

27

RXO DC Voltage

VRXO

Rx Mode

DRXO DC Voltage

DVRXO Rx to Tx Mode

RXO High Voltage

VRXOH

Iout=-1mA,

3.7

RXI=VB+1.5V

RXO Low Voltage

VRXOL

Iout=+1mA,

RXI=VB-1V,

Output Measured

with Respect to

VB

RXI Input Resistance

RRXI

RXI<350mVrs

7

TRANSMIT ATTENUATOR GAIN(f=1kHz)

Tx Mode, TXI=150mVrms

GTX

4

Idle Mode, TXI=150mVrms

GTXI

-22

Tx to Rx Mode Range

DGTXI

49

TXO DC Voltage

VTXO

Tx

DTXO DC Voltage

DVTXO

Tx to Rx Mode

TXO High Voltage

VTXOH

Iout=-1mA,

3.7

TXI=VB+1.5V

TYP MAX

5.5

8

600

800

90

Vcc

0.8

1.3

2.1

2.4

400

54

6

6

0

-25

-20

52

35

VB

+-10

8

8

+0.5

-15

-17

54

+-150

-1.5

-1

10

6

-20

52

VB

+-30

14

8

-17

54

+-150

UNIT

mA

mA

kW

V

V

V

W

dB

dB

dB

dB

dB

dB

dB

dB

V

mV

V

V

kW

dB

dB

dB

V

mV

V

Contek Microelectronics Co.,Ltd.

4

CONTEK

http://www.contek-ic.com E-mail:sales@contek-ic.com

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