IN9270 데이터 시트보기 (PDF) - Integral Corp.

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IN9270

DTMF RECEIVER High-Performance Silicon-Gate CMOS

Integral Corp. 

TECHNICAL DATA

DTMF RECEIVER

High-Performance Silicon-Gate CMOS

IN9270

The IN9270 is a complete DTMF receiver integrating both the

bandsplit filter and digital decoder functions. The filter section uses

switched capacitor techniques for high- and low-group filters and dial-

tone rejection. Digital counting techniques are employed in the

decoder to detect and decode all 16 DTMF tone-pairs into a 4-bit

code. External component count is minimized by on-chip provision of

a differential input amplifier, clock-oscillator and latched 3-state bus

interface.

• Complete receiver in an 18-pin package.

• Excellent performance.

• CMOS, single 5 volt operation.

• Minimum board area.

• Central office quality.

• Low power consumption.

ORDERING INFORMATION

IN9270N

TA = -10° to 70° C

LOGIC DIAGRAM

PIN ASSIGNMENT

* Connect to GND

PIN 9 = GND

PIN 18 = VCC

PINS 5,6 = NO CONNECTION

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