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PDF NT91214 Data sheet ( Hoja de datos )
| Número de pieza | NT91214 | |
| Descripción | (NT91214 / NT91215) Tone / Pulse Dialer | |
| Fabricantes | Novatek | |
| Logotipo |  |
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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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AC Characteristics (continued)
Parameter
Auto-redial Break Time
Delay time Key valid to Signal Out
Key-in Debounce
Key Release Debounce Time
Key-in Tone Duration
Key-in Tone Frequency
Minimum Tone Duration Time
Min. Tone Inter-digit Pause
Redial Tone Duration
Redial Tone Inter-digit Duration
Symbol
TAOBK
TD
TKD
TKLD
TKTD
FKT
TMFD
TTIDP
TMFDR
TTIDPR
Min.
NT91214/15 Series
Typ.
2.2
0
21
5.2
23
437
94
96
94
96
Max.
Unit
Conditions
sec * Optional
ms
ms
ms
ms
HZ
ms
ms
ms
ms
Comparisons of Specified vs. Actual Tone Frequencies
R/C
Spec.
Actual
R1 697 699.1
R2 770 771.5
R3 852 852.3
R4 941 942.0
C1
1,209
1,215.7
C2
1,336
1,331.7
C3
1,477
1,471.9
Error (%)
+0.31
+0.19
+0.03
+0.10
+0.57
-0.32
-0.35
Unit Conditions
Hz
Hz
Hz
Hz Fosc = 3.579MHz
Hz
Hz
Hz
5 V1.0
5 Page 
as the first key pressed, will not produce any pause
time. There are only 31 digits of redial memory
available in the buffer to be used for operations a
and b, since the mode switching key, */T , will
occupy one digit of space.
NT91214/15 Series
11 V1.0
11 Page | ||
| Páginas | Total 23 Páginas | |
| PDF Descargar | [ Datasheet NT91214.PDF ] | |
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