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PDF HT9306 Data sheet ( Hoja de datos )
| Número de pieza | HT9306 | |
| Descripción | (HT9305 / HT9306) 5-Memory Tone/Pulse Dialer | |
| Fabricantes | Holtek | |
| Logotipo |  |
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HT9305/6 Series
5-Memory Tone/Pulse Dialer
Features
Patent Number: 64097, 86474, 113235(R.O.C.), 5424740(U.S.A.)
• Universal specification
• Operating voltage: 2.0V~5.5V
• Low standby current
• Low memory retention current: 0.1µA (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
• 4×5 keyboard matrix
• 3.58MHz crystal or ceramic resonator
• Hand-free control
• Hold-line control
• Pause, P→T can be saved for redialing
• Lock function
• Keytone function
• Resistor options:
– M/B ratio
– Flash function and flash time(86ms~600ms)
– Pause and P→T duration
– Pulse number
– Keyboard operated IDD lock function
– Key board form
General Description
The HT9305/6 series tone/pulse dialers are
CMOS LSIs for telecommunication systems. They
are designed to meet various dialing specifica-
tions through resistor option matrix.
The HT9305/6 series tone/pulse dialers are
offered in four different versions. They are
HT9305x/HT9306x normal version; HT9305xL/HT9305xI
lock version, with keyboard-operated IDD lock
function; HT9305xT keytone version; and
HT9305xLT/HT9305xIT keytone/lock function
version. The four versions also supply the fol-
lowing functions: Hold-line, Hand-free and
LCD dialing number display interface, all of
which are suitable for feature phone applica-
tions.
1 21st Jan ’98
Free Datasheet http://www.Datasheet4U.com
1 page  
HT9305/6 Series
Pin Description
Pin Name
I/O
Internal
Connection
Description
C1~C5
R1~R4
These pins form a 4×5 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~C5) remains low and the
row group (R1~R4) is set high for key input detection.
I/O
CMOS
IN/OUT
An inexpensive single contact 4×5 keyboard can be used as an
input device. Pressing a key connects a single column to a single
row, and actuates the system oscillator that results in a dialing
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 arrangement and
to the functional description for dialing specification selection.
The system oscillator consists of an inverter, a bias resistor
X1 I
and the necessary load capacitor on chip. Connecting a
OSCILLATOR
standard 3.579545MHz crystal or ceramic resonator to the X1
and X2 terminals can implement the oscillator function. The
X2 O
oscillator is turned off in the standby mode, and is actuated
whenever a keyboard entry is detected.
XMUTE
HKS
TEST
PO
XMUTE is an NMOS open drain structure pulled to VSS
O
NMOS OUT
during dialing signal transmission. Otherwise, it is an open
circuit. XMUTE is used to mute the speech circuit when
transmitting the dial signal.
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-line control input),
other functions are all disabled.
HKS=VSS: Off-hook state (PO=high). The chip is in the standby
mode and ready to receive the key input.
I
CMOS IN
This is a test pin. It should be connected to VDD when in
normal operation.
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)
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 21st Jan ’98
Free Datasheet http://www.Datasheet4U.com
5 Page 
HT9305/6 Series
All the resistors are 330kΩ. The resistor option
functions and the default specifications (with-
out option resistors) are listed below.
Option
Option
Resistor Function
Default
(No Resistor)
RK12
Make/Break
Ratio Selection
40:60
RK13
RK14
Flash Function Flash= control
and Flash Time
function
Selection
Flash time= 600ms
RK21
Pause & P→T
Duration
Selection
TP= 3.6s
TP→T= 3.6s
RK31
RK41
Pulse Number
Selection or IDD
Lock Selection
N or Keyboard
operated lock
RK51 Keypad Form
FormA
M/B ratio selection table
RK12
M/B Ratio (%)
No 40:60
Yes 33.3:66.6
Flash function/time (duration) selection table
• HT9305x/xT
RK13
RK14
Flash
Flash
Function Time (TF)
No No Control 600ms
No Yes
Digit
600ms
Yes No
Digit
98ms
Yes Yes
Digit
300ms
• HT9305xL/xLT
RK13
No
No
Yes
Yes
RK14
No
Yes
No
Yes
Flash
Function
Control
Control
Control
Control
Flash
Time (TF)
600ms
600ms
98ms
300ms
• HT9306x
RK13
No
No
Yes
Yes
RK14
No
Yes
No
Yes
Flash
Function
Control
Digit
Digit
Digit
Flash
Time (TF)
600ms
600ms
86ms
300ms
Pause and P→T duration selection table
RK21
TP (sec)
TP→T (sec)
No 3.6 3.6
Yes 2
1
Pulse number selection table
• This table shows the pulse number selections
for HT9305x/HT9306x and HT9305xT. The ta-
ble for HT9305xL and HT9305xLT is used to
select IDD lock function.
RK31
RK41
Pulse
Number
No No
N
No Yes N+1
Yes No 10−N
Yes Yes
—
11 21st Jan ’98
Free Datasheet http://www.Datasheet4U.com
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HT9306.PDF ] | |
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