NTE1731
Integrated Circuit
CMOS 10 Number Pulse Dialer
Description:
The NTE1731 is a CMOS LSI repertory dialer with ten 16鈥揹igit number memory storage in a 16鈥揕ead
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: 鈥?鈥?True
D
Mute Output: 鈥?鈥?True
D
Stores Ten 16鈥揹igit 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鈥揌ook, Battery Operation On鈥揌ook
D
Uses Either a Standard 2鈥搊f鈥? 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
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3V
Maximum Pin Voltage 2 (Note 4), V
in2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +0.3V
Operating Temperature Range, T
opr
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?0擄 to +50擄C
Storage Temperature Range, T
stg
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?5擄 to +150擄C
Note
Note
Note
Note
1.
2.
3.
4.
Referenced to GND
T
A
= +25擄C
The Maximum applicable voltage on any pin with respect to GND
The maximum applicable voltage on any pin with respect to V
DD
Recommended Operating Conditions:
Supply Voltage, V
DD
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.6V to 6.0V
1
2
3
4
5
