ECG1691 Telephone Pulse Dialer w/Redial ~ 18 Pin DIP The ECG1691 is a monolithic CMOS integrated circuits in an 18 Lead DIP type packagethat provide all the features required for implementing a pulse dialer with redial. Functions: Mute Output Logic Pulse Output Logic RC Oscillation for Reference Frequency Designed to Operate Directly from the Telephone Line Used CMOS Technology for Low Voltage, Low Power Operation Power Up Clear Circuitry NTE1691 Pin2: VREF Features: Uses Either a Standard 2 of 7 Matrix Keyboard with Negative True Common or the Inexpensive Form A Type Keyboard Make/Break Ratio Can Be Selected Redial with * or # Tone Signal Output or On Chip Reference Voltage by Bonding Option on Chip 10pps/20pps Can be Selected Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) DC Supply Voltage, VCC: 6.2V Voltage on Any Pin, VIN: VCC+0.3, GND 0.3V Power Dissipation, PD: 500mW Operating Temperature Range, Topr: 30° to +60°C Storage Temperature Range, Tstg: 65° to +150°C
