NTE1731 Datasheet, PDF (1/5 Pages) NTE Electronics – Integrated Circuit CMOS 10 Number Pulse Dialer

NTE1731
Integrated Circuit
CMOS 10 Number Pulse Dialer
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 tele-
phone 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), V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.2V
Power Dissipation (Note 2), P_D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW
Maximum Pin Voltage 1 (Note 3), V_in1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3V
Maximum Pin Voltage 2 (Note 4), V_in2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V
Operating Temperature Range, T_opr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –30° to +50°C
Storage Temperature Range, T_stg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +150°C
Note 1. Referenced to GND
Note 2. T_A = +25°C
Note 3. The Maximum applicable voltage on any pin with respect to GND
Note 4. The maximum applicable voltage on any pin with respect to V_DD
Recommended Operating Conditions:
Supply Voltage, V_DD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6V to 6.0V