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PDF HT93214AT Data sheet ( Hoja de datos )
| Número de pieza | HT93214AT | |
| Descripción | 1-memory Tone/Pulse Dialer | |
| Fabricantes | Holtek Semiconductor Inc | |
| Logotipo |  |
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HT93214 Series
1-memory Tone/Pulse Dialer
Features
Patent Number: 86474, 84545(R.O.C)
· Operating Voltage: 2.0V~5.5V
· Low standby current
· Low memory retention current: 0.1mA (Typ.)
· Tone/Pulse switchable
· 32 (pulse)/31 (tone) digits for redialing
· Pause and P ® T key for PBX
· 4´4 keyboard matrix
· 3.58MHz crystal or ceramic resonator
· Hand-free control
· Pause, P ® T can be saved for redialing
· One-key redialing
· Keytone output
· Pause time: 2.2s
· Cascadable manual dialing after redialing
· Calibrated DTMF timing for redialing
· HT93214A: 16-pin DIP package
HT93214B/AT: 18-pin DIP package
General Description
The HT93214 are dialer series designed for low cost
telephone set applications with expandable features
such as Lock function, keytone and LCD display inter-
face. With a 4´4 keyboard, it performs normal
tone/pulse switchable dialing, and provides one-key
redialing function with a 32-digit memory for speed dial-
ing. An on-chip oscillator is built-in to work with an exter-
nal 3.58Mhz crystal or ceramic resonator for accurate
timing. The HT93214 provides 300ms (F1 key) and
600ms (F2 key) of flash time; Tone dialing and 10pps,
20pps selection with 1/2 M/B ratio for pulse dialing.
Selection Table
HT93214 series
Function Hand-
Part No.
Free
HT93214A
HT93214B
HT93214AT
Ö
Key
Tone
Ö
Flash
Control
Control
Control
Flash
Time
(ms)
Pulse
No.
Tone
Duration
(ms)
Inter
Tone
Pause (ms)
PPS
300/600 N
94
96 10/20
300/600 N
94
96 10/20
300/600 N
94
96 10/20
PKG
M/B DIP
300mil
1/2 16
1/2 18
1/2 18
Rev. 1.10
1 October 2, 2002
1 page  
HT93214 Series
Symbol
Parameter
Test Conditions
VDD Conditions
TFP Pause Time After Flash
2.5V
¾
TRP One-key Redialing Pause Time 2.5V
¾
FOSC System Frequency
¾¾
TDB Key-in Debounce Time
2.5V
¾
TBRK Break Time For One-key Redialing 2.5V
¾
THKDL Off-hook Delay Time
10pps
2.5V
20pps
Min.
¾
¾
¾
¾
¾
¾
¾
Typ.
800
800
3.58
20
2.2
800
500
Max. Unit
¾ ms
¾ ms
¾ MHz
¾ ms
¾s
¾
ms
¾
Pulse Mode Electrical Characteristics
Symbol
Parameter
IPOH
IPOL
PO Output Source Current
PO Output Sink Current
PR Pulse Rate
M/B
TPDP
Make/Break Ratio
Pre-digit-pause Time
TIDP Inter-digit-pause Time
TM Pulse Make Duration
TB Pulse Break Duration
TP Pause Time
Test Conditions
VDD Conditions
2.5V VOH=2V
2.5V VOL=0.5V
MODE pin is
¾ connected to VDD
MODE pin is opened
¾¾
M/B=33:66 (10 pps)
¾
M/B=33:66 (20 pps)
10 pps
¾
20 pps
10 pps, M/B=1/2
¾
20 pps, M/B=1/2
10 pps, M/B=1/2
¾
20 pps, M/B=1/2
¾¾
FOSC=3.5795MHz, Ta=25°C
Min. Typ. Max. Unit
-0.2
0.2
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
0.6
10
20
33:66
33
17
800
500
33.3
16.7
66.6
33.3
2.2
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
mA
mA
pps
%
ms
ms
ms
ms
s
Tone Mode Electrical Characteristics
Symbol
Parameter
VTDC
ITOL
VTAC
RL
ACR
THD
TTMIN
TITPM
DTMF Output DC Level
DTMF Sink Current
DTMF Output AC Level
DTMF Output Load
Column Pre-emphasis
Tone Signal Distortion
Minimum Tone Duration
Minimum Inter-Tone Pause
Test Conditions
VDD Conditions
¾ No load
2.5V VDTMF=0.5V
Row group,
¾ RL=5kW
2.5V THD£-23dB
2.5V Row group=0dB
2.5V RL=5kW
¾ Auto-redial
¾ Auto-redial
THD (Distortion) (dB) = 20 log ( V12 + V22 +....+ Vn2 / Vi2 + Vh2 )
Vi, Vh: Row group and column group signals
V1, V2, ... Vn: Harmonic signals (BW=300Hz~3500Hz)
FOSC=3.5795MHz, Ta=25°C
Min. Typ. Max. Unit
0.45VDD
0.1
¾
¾
0.7VDD
¾
V
mA
0.12 0.155 0.18 Vrms
5 ¾ ¾ kW
1 2 3 dB
¾ -30 -23 dB
¾ 94 ¾ ms
¾ 96 ¾ ms
Rev. 1.10
5 October 2, 2002
5 Page 
· Flash key operation
HKS
K E Y IN
XM U TE
PO
D TM .
KT
X2
.
T DB
T.
T K T 6 0 0 H z c a r r ie r
20m s
· Pulse to Tone operation
T .P
HKS
K E Y IN
XM U TE
PO
D1
T DB
D2
* /T
T PDP
T ID P + T P D P
D3
T ID P
D TM .
KT
X2
M O DEO
T K T 6 0 0 H z c a r r ie r
20m s
1 .2 k H z c a r r ie r
T P® T
HT93214 Series
H ig h Im p e d a n c e
H ig h Im p e d a n c e
T IT P M
T T M IN
Rev. 1.10
11 October 2, 2002
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet HT93214AT.PDF ] | |
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