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PDF HT9320C Data sheet ( Hoja de datos )
| Número de pieza | HT9320C | |
| Descripción | 22-Memory Tone/Pulse Dialer | |
| Fabricantes | Holtek Semiconductor Inc | |
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HT9320 Series
22-Memory Tone/Pulse Dialer
Features
Patent Number: 64097, 86474, 113235(R.O.C.), 5424740(U.S.A.)
· Universal specification
· Operating voltag0e: 2.0V~5.5V
· Low standby current
· Lowmemoryretentioncurrent:0.1mA(typ.)
· Tone/pulse switchable
· Interface with LCD driver
· 32 digits for redialing
· 32 digits for the SA memory dialing
· One-key redialing
· Pause and P®T key for PBX
· 3.58MHz crystal or ceramic resonator
· Hand-free control
· Hold-line control
· Pause, P®T can be saved for redialing
· On-hook store function
· Keytone function
· Lock function
· Resistor options
- M/B ratio
- Flash function and flash time
- Pause and P®T duration
- Pulse number
- Inter-digit pause time for 10pps
· Memory number: 22 memories
General Description
The HT9320 series tone/pulse dialers are
CMOS LSI for telecommunication systems.
They are designed to meet various dialing spec-
ifications through resistor option matrix.
The HT9320 series are offered in six different
versions. The different functions of the six ver-
sions are listed in the selection table. The
HT9320A, HT9320H versions provide the
on-hook store function; the HT9320B version
provides the LCD interface function; the
HT9320K version provides the keytone func-
tion; the HT9320L version provides both the
LCD interface function and IDD lock function.
The six versions also supply the hold-line and
hand-free functions, which are suitable for feature
phone applications.
HT9320 series provide SA, Redial and 20
one-touch/two-touch memory dialing. If the
keyboard includes M1~M20 keys it can be used
as one-touch memory dialing. Otherwise, it
works as two-touch (PAGE®M1~M10) or
three-touch(A®PAGE®0~9) memory dialing
for speed dialing in either pulse or tone mode.
1 July 21, 1999
1 page  
HT9320
Pin Description
Pin Name
I/O
Internal
Connection
Description
C1~C8
R1~R5
These pins form a 5´8 keyboard matrix which can perform
keyboard input detection and dialing specification setting
functions. When on-hook (HKS=high) all the pins are set high.
While off-hook the column group (C1~C8) remains low and the
row group (R1~R5) is set high for key input detection.
For the HT9320L-X, the column group remains high and the
I/O
CMOS
IN/OUT
row group is set low for key input detection.
An inexpensive single contact 5´8 keyboard can be used as an
input device. Pressing a key connects a single column to a sin-
gle row, and actuates the system oscillator that results in a di-
aling signal output. If more than two keys are pressed at the
same time, no response occurs. The key-in debounce time is
20ms. Refer to the keyboard information for keyboard ar-
rangement and to the functional description for dialing speci-
fication selection.
The system oscillator consists of an inverter, a bias resistor
X1 I
and the necessary load capacitor on chip. Connecting a stan-
OSCILLATOR
dard 3.579545MHz crystal or ceramic resonator to the X1 and
X2 terminals can implement the oscillator function. The oscil-
X2 O
lator is turned off in the standby mode, and is actuated when-
ever a keyboard entry is detected.
XMUTE
XMUTE is an NMOS open drain structure pulled to VSS dur-
O
NMOS OUT
ing dialing signal transmission. Otherwise, it is an open cir-
cuit. XMUTE is used to mute the speech circuit when
transmitting the dial signal.
HKS
This pin is used to monitor the status of the hook-switch and its
combination with HFI/HDI can control the PO pin output to
make or break the line.
I
CMOS IN
HKS=VDD: On-hook state (PO=low). Except for HFI/HDI
(hand-free/hold-lineco ntrolinput),other
functions are all disabled.
HKS=VSS:Off-hookstate(PO=high).The chipisinthestand-
by mode and ready to receive the key input.
This pin is a CMOS output structure which by receiving the
HKS and HFO/HDO signals, control the dialer to connect or
disconnect the telephone line.
PO outputs a low to break line when HKS is high (on-hook)
PO O CMOS OUT and HFO/HDO is low. PO outputs a high to make line when
HKS is low (off-hook) or HFO is high or HDO is high.
During the off-hook state, this pin also outputs the dialing
pulse train in pulse mode dialing. While in the tone mode, this
pin is always high.
5 July 21, 1999
5 Page 
HT9320
Symbol
Parameter
Test Conditions
VDD
Conditions
THD Tone Signal Distortion
2.5V RL=5kW
TTMIN Minimum Tone Duration ¾ Auto-redial
TITPM Minimum Inter-tone Pause ¾ Auto-redial
Min.
¾
¾
¾
THD (Distortion) (dB) = 20 log ( V12 + V22 +K Vn2 / Vi2 + Vh2 )
Vi, Vh: Row group and column group signals
V1, V2, ... Vn: Harmonic signals (BW=300Hz~3500Hz)
Typ. Max. Unit
-30
82.5
85.5
-23
¾
¾
dB
ms
ms
Functional Description
Keyboard matrix
C1~C8 and R1~R5 form a keyboard matrix. To-
gether with a standard 5´8 keyboard, the key-
board matrix is used for dialing entries. In
addition, the keyboard matrix also provides resis-
tor options for different dialing specification se-
lections. The keyboard arrangement for the
HT9320 series are shown in the Keyboard In-
formation.
Tone frequency
Tone
Name
Output
Frequency (Hz)
Specified Actual
R2 697 699
R3 770 766
R4 852 847
R5 941 948
C1
1209
1215
C2
1336
1332
C3
1477
1472
% Error
+0.29%
-0.52%
-0.59%
+0.74%
+0.50%
-0.30%
-0.34%
Note: %Errordoesnotcontainthecrystalfrequency
drift
Dialing specification selection
Various dialing specifications can be selected by
adding resistors across keyboard matrix pins.
The allowable option resistor connections are
shown on the table.
C1 C2 C3 C4 C5 C6 C7
R1
R 2 R K 21 R K 31 R K 41 R K 51 R K 61 R K 71
R K 12
R3
R K 13
R4
R K 14
All the resistors are 330kW. The resistor option
functions and the default specifications (with-
out option resistors) are listed below (HT9320A/
B/C/K/L).
Option
Resistor
Option
Function
Default
(No Resistor)
RK12
(HT9320B/ Ratio Selection
C/K/L)
40:60
RK13
RK14
Flash= control
Flash Function
function
/Time Selection Flash time=
600ms
RK21
Pause & P®T
Duration
Selection
TP= 3.6s
TP®T= 3.6s
RK31
RK41
Pulse Number
Selection
RK51
Inter-digit-
(HT9320A Pause Time for
/B/C/K) 10pps
N
800ms
11 July 21, 1999
11 Page | ||
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| PDF Descargar | [ Datasheet HT9320C.PDF ] | |
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