NT91214 Ver la hoja de datos (PDF) - Unspecified

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Fabricante

NT91214

Tone/Pulse Dialer

Unspecified 

NT91214/15 Series

Tone/Pulse Dialer

Features

T One touch redial operation

T Tone/Pulse switchable

T 32 digit capacity for redialing

T Automatic mixed redialing (last number redial) of pulse

to DTMF with multiple automatic access pauses

T PABX auto-pause is 2.2 seconds

T DTMF Timing:

Manual dialing: minimum duration for bursts and

pauses

Redialing: calibrated timing

T Hands-Free control function

T Wide operating voltage range: 2V to 5.5V

T Key-in beep tone output

T Digits dialed manually after redialing are cascadable

and stored as additional digits for the next redialing

T Uses inexpensive ceramic resonator (3.58 MHz)

T Two versions for different telephone systems

T Built-in power up reset circuit

T Four extra function keys: flash, pause, redial and DP

or

DTMF mixed dialing

T 4 x 4 (or 2 x 8) keyboard can be used

T Low standby current

General Description

The NT91214/15 is a single-chip, silicon gate, CMOS

integrated circuit with an on-chip oscillator for a 3.58MHz

crystal or ceramic resonator. It provides a dialing pulse

(DP) or dual tone multi-frequency (DTMF) dialing. A

standard 4 x 4 matrix keyboard can be used to support

either DP or DTMF modes.

Up to 32 digits can be saved in the on-chip RAM for

redialing. In the DTMF mode, a short minimum tone

duration and minimum intertone pause allows rapid

dialing. Maximum tone duration depends on the key

depression time during manual dialing.

Pin Configurations

a. 16-Pin Package

b. 18-Pin Packages

(i) Key Tone Output

(ii) Hands-Free Control

c. 20-Pin Package

1

V1.0

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