NTE1731 Datasheet | NTE Electronics

Description : The NTE1731 is a CMOS LSI repertory dialer with ten 16- digit number memory storage in a 16- Lead DIP type package. The pulse and mute signal outputs resulting from keyboard input are like those of a pulse dialer. The NTE1731 incorporates a 64 x 10 bit RAM which is used to store the ten telephone numbers. When used in a Public Branch Exchange (PBX) system, a Pause function is provided. This function suspends dial pulse output upon pause detection (via # key input), and resumes the output after one of the numeric keys is pressed. Features : D Make Ratio: 30/40% Pin Selectable D Pulse Output: “0” True D Mute Output: “0” True D Stores Ten 16- digit Telephone Numbers D One Temporary Memory and Permanent Memory Storage of Telephone Numbers are Possible D Uses a CR Oscillator as a Frequency Reference D Line Operation Off- Hook, Battery Operation On- Hook D Uses Either a Standard 2- of- 7 Matrix Keyboard or a Single Contact Keyboard D PBX Pause Storage Absolute Maximum Ratings: Supply Voltage (Note 1), VDD - - - - - - - - - - - 6.2V Power Dissipation (Note 2), PD - - - - - - - - - - . 500m W Maximum Pin Voltage 1 (Note 3), Vin1 - - - - - - - - - . . - 0.3V Maximum Pin Voltage 2 (Note 4), Vin2 - - - - - - - - - . . +0.3V Operating Temperature Range, Topr - - - - - - - - . - 30° to +50°C Storage Temperature Range, Tstg - - - - - - - - . . - 55° to +150°C Note Note Note Note 1. 2. 3. 4. Referenced to GND TA = +25°C The Maximum applicable voltage on any pin with respect to GND The maximum applicable voltage on any pin with respect to...