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IL34118

Voice Switched Speakerphone Circuit

Integral Corp. 

IL34118

ELECTRICAL CHARACTERISTICS(TA = -25 to +70°C, VCC = 5.0 V , CD = 0.8 V, unless noted)

Guaranteed

Symbol

Parameter

Test Conditions

Limits

Unit

Min Max

∆VRXO ∆RXO DC Voltage

Rx to Tx Mode

-

±190 mV

VRXOH RXO High Voltage

IOUT= -1.0 mA,RXI=VB+1.5V,

2.8

-

V

VCT=2.6 V

VRXOL RXO Low Voltage

IOUT= +1.0 mA,RXI=VB-1.0V,

VCT=2.6 V

Output measured with respect to

VB

-

VB-0.75 V

RRXI RXI Input Resistance

RXI=350 mVrms, f = 1.0 KHz

5.25

17.5

kΩ

GTX

GTXI

∆GTXI*

Trasmit Attenuator Gain

( f =1.0 KHz)

Tx Mode, TXI=150 mVrms

Idle Mode, RXI=-150 mVrms

Range (Tx to Rx Mode)

1.5

10.0

dB

-25

-15

49

54

∆VTXO

VTXOH

∆TXO DC Voltage

TXO High Voltage

VTXOL TXO Low Voltage

RTXI TXI Input Resistance

Tx to Rx Mode

-

IOUT= -1.0 mA,TXI=VB+1.5V,

2.8

VCT=1.6 V

IOUT= +1.0 mA,TXI=VB-1.0V,

-

VCT=1.6 V

Output measured with respect to

VB

TXI=350 mVrms, f = 1.0 KHz

5.25

ATTENUATOR CONTROL

ICTR CT Source Current (switching f = 1 KHz, VLC = VB =CT

-106

to Rx mode)

ICTT CT Sink Current (switching to f = 1 KHz, VLC = VB =CT

+30

Tx mode)

RFI*

CT Fast Idle Internal

1.5

Resistance

VDT* Dial Tone Detector Threshold

10

MICROPHONE AMLIFIER (VMUT ≤ 0.8 V, A+ = 31 dB, unless otherwise noted)

MCOVOS Output Offset

VMCO - VB,

-62

Freedback R= 180 KΩ

AVOLM Open Loop Gain

f = 100 Hz

60

VMCOH

VMCOL

GMT

Output High Voltage

Output LowVoltage

Muting (∆Gain)

RMUT MUT Input Resistance

IOUT=-1.0 mA,VMCI=VB+1.5 V

2.8

IOUT=1.0 mA, VMCI=VB - 1.0 V

-

f = 1.0 Khz,VMCI = 150 mV

52

0.8 V ≤ VMUT ≤ 2.0 V

VCC = VMUT = 6.5 V

37.5

VMUTH MUT Input-High

2.0

VMUTL MUT Input-Low

0

±190 mV

-

V

VB-0.75 V

17.5 KΩ

-30

µA

+106 µA

3.6

KΩ

20

mV

+62 mV

-

dB

-

V

250

mV

-

dB

-

KΩ

VCC

V

0.8

V

(continued)

10

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