ECG1690, Telephone Dual Tone Multifunction (DTMF) Dialer IC ~ 16 Pin DIP (NTE1690) The ECG1690 is a monolithic integrated circuit in a 16−Lead DIP type package fabricated using CMOS process and is designed specifically for integrated tone dialer applications. Features: ECG1690 Telephone DTMF Dialer IC ~ 16 Pin DIP (NTE1690) High Accuracy Tones Digital Divider Logic, Resistive Ladder Network and CMOS Operational Amplifier on a Single Chip Uses Inexpensive 3.579545MHz Television Color Burst Crystal Invalid Key Entry Can Result in Either Single Tone or No Tone Tone Disable Allows Any Key Down Output to Function from Keyboard Input Without Generating Tones Package/Case: 16 Pin DIP Replaces: NTE1690 Functions: Fixed Supply Operation Negative−True Keyboard Input Tone Disable Input Stable−Output Level Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, VDD: 10.5V Any Input Relative to VDD (Except Pin10), VN: 0.3V Any Input Relative to GND (Except Pin10), VN: −0.3V Power Dissipation, PD: 500mW Operating Temperature Range, Topr: −30° to +60°C Storage Temperature Range, Tstg: −55° to +150°C
