IL9270 Datasheet, PDF (1/12 Pages) Integral Corp. – DTMF RECEIVER High-Performance Silicon-Gate CMOS

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 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.
D SUFFIX
SOIC
ORDERING INFORMATION
IL9270N/D
T_A = -10° to 70° C
LOGIC DIAGRAM
PIN ASSIGNMENT
PIN 9 = GND
PIN 18 = V_CC
PINS 5,6 = NO CONNECTION
* Connect to GND