IL9270

TECHNICAL DATA DTMF RECEIVER High-Performance Silicon-Gate CMOS IL9270 The IL9270N/D 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 dialtone 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. D SUFFIX SOIC ORDERING INFORMATION IL9270N/D TA = -10° to 70° C LOGIC DIAGRAM PIN ASSIGNMENT PIN 9 = GND PIN 18 = VCC PINS 5,6 = NO CONNECTION * Connect to GND IL9270 PIN DESCRIPTIONS NAME PIN ESt 16 GS IC IN+ INC1 C2 Q1-Q4 StD 3 5,6 1 2 7 8...