IL9270 datasheet(9/12 Pages) INTEGRAL

Part #	IL9270

Description	DTMF RECEIVER High-Performance Silicon-Gate CMOS

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Manufacturer	INTEGRAL [Integral Corp.]

Direct Link	http://www.iksemi.com/

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IL9270

tGTP= (RPC) ln

(

)

tGTA = (R1 C) ln

(

)

RP =

a) Descreasing tGTP ( tGTP < tGTA )

tGTP= (R1C) ln

(

)

tGTA = (RPC) ln

(

)

VCC

VTST

VCC - VTST

R1 + R2

R1 R2

VTST

VCC - VTST

R1 R2

RP =

R1 + R2

b) Descreasing tGTA ( tGTP > tGTA )

Figure 4.Guard Time Adjustment

Figure 5. Single Ended Input Configuration

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