IL9151-3 - IK Semiconductor

IL9151-3 Pulse Dialer

PIN No. 1 2 3 4 14 15 16 5 12 6 7 8 NAME R1~R4 Key inputs. These inputs can be interfaced to either an XY matrix keyboard or a 2 of 7 type keyboard. The keypad inputs are normally held at high. When a key is depressed, scanning signals are presented at C1, C2, and C3 inputs; the dialer identifies the key by examining the R1~R4 inputs. Debouncing is provided .

Features

RD ASSIGNMENT R1 R2 R3 R4 1 2 3 4 5 6 7 8 9
* 0 # C1 C2 C3 (
*,# : Redial) PIN 5 = VCC PIN 12 = GND ww.DataSheet4U.com IL9151-3 PIN DESCRIPTION PIN No. 1 2 3 4 14 15 16 5 12 6 7 8 NAME R1~R4 Key inputs. These inputs can be interfaced to either an XY matrix keyboard or a 2 of 7 type keyboard. The keypad inputs are normally held at high. When a key is depressed, scanning signals are presented at C1, C2, and C3 inputs; the dialer identifies the key by examining the R1~R4 inputs. Debouncing is provided to avoid false entry. Positive power supply input. Negative power supply input. Oscillator ci.