Holtek Semiconductor Inc HT9320A, HT9320B, HT9320C, HT9320H, HT9320K Datasheet
...
HT9320 Series
22-Memory Tone/Pulse Dialer
Features
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
·
Patent Number: 64097, 86474, 113235(R.O.C.), 5424740(U.S.A.)
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 versions 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 function; the HT9320L version provides both the
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
·
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
Selection Table
Function
Part No.
HT9320A
HT9320B
HT9320C
HT9320H
HT9320K
HT9320L
HT9320L-X
Memory
Hold-
Dialing
Line
SA, R
M1~M20
SA, R
M1~M20
SA, R
M1~M20
SA, R
M1~M20
SA, R
M1~M20
SA, R
M1~M20
The same as HT9320L, but the voltage polarity of the row group and the column group are reversed.
Pin Assignment
Hand-
LCD
Free
Interface
ÖÖ ¾
ÖÖ Ö
¾¾ ¾
ÖÖ ¾
ÖÖ ¾
ÖÖ Ö
Pulse
No.
N+1
10-N
N+1
10-N
N+1
10-N
N+1
10-N
N+1
10-N
Tone
Dura
tion
(ms)
82.5 85.5
82.5 85.5
82.5 85.5
82.5 85.5
82.5 85.5
Flash
Function
Control 600 N,
Digit 600/300/98
Control 600 N,
Digit 600/300/98
Control 600 N,
Digit 600/300/98
Digit 600/100 N 82.5 82.5
Control 600 N,
Digit 600/300/98
Control 600 N,
Digit 600/300/98
Flash
Time
(ms)
InterTonePause
(ms)
HT9320
Key-
M/B
IDD
Pin
Lock
Ö¾¾Ö
¾¾¾¾
¾¾¾¾
Ö¾¾Ö
¾¾ Ö ¾
¾Ö¾¾
Tone
Output
OnHook
Store
Package
28 DIP
28 DIP
22SKDIP
28 DIP
28 DIP
28 DIP
C8
HST
R1
R2
R3
R4
R5
HKS
M/B
HFI
MODE
X1
X2
VDD
28
1
27
2
26
3
25
4
24
5
23
6
22
7
21
8
20
9
19
10
18
11
17
12
16
13
15
14
H T 9320A /H
28 D IP
C7
C6
C5
C4
C3
C2
C1
PO
HFO
XM UTE
DTM F
HDI
HDO
VSS
C8
DOUT
R1
R2
R3
R4
R5
HKS
CLOCK
HFI
MODE
X1
X2
VDD
H T 9320B /L/L -X
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 D IP
C7
28
C6
27
C5
26
C4
25
C3
24
C2
23
C1
22
PO
21
HFO
20
XM UTE
19
DTMF
18
HDI
17
HDO
16
VSS
15
C8
R1
R2
R3
R4
R5
HKS
MODE
X1
X2
VDD
1
2
3
4
5
6
7
8
9
10
11
C7
22
C6
21
C5
20
C4
19
C3
18
C2
17
C1
16
PO
15
XM UTE
14
DTMF
13
VSS
12
H T 9320C
22 S K D IP
C8
KT
R1
R2
R3
R4
R5
HKS
NC
HFI
MODE
X1
X2
VDD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
H T 9320K
28 D IP
C7
28
C6
27
C5
26
C4
25
C3
24
C2
23
C1
22
PO
21
HFO
20
XM UTE
19
DTMF
18
HDI
17
HDO
16
VSS
15
2 July 21, 1999
Block Diagram
HT9320
HST
C1
C8
R1
R5
X1
X2
Key
Colum n
Key Row
D ivider
FSM
Key
Function
Encoder
Encoder
D ebounce
Clock
G enerator
C ontrol
WRM
C ounter
ADDRL
Keytone
Circuit
M/B
M/B
KT
SRAM
Flash
Tim er
C heck
Tone
Encoder
C onverter
M ode In
Tone
Out
Pulse
Out
HD/HF
DOUT
CLOCK
DTM F
PO
XM U TE
HKS
HFI
HDI
HDO
HFO
MODE
3 July 21, 1999
Keyboard Information
HT9320A/B/C/K/L HT9320H
· O ne-touch m em ory keyboard
C1
C2 C3 C4 C5 C7 C8C6
R1
R2
R3
R4
R5
SA
*/T
P
F
3
2
1
6
5
4
ST
9
8
7
R
#
0
M1
M2
M3
M4
M5
M6
M7
M8
M9
M10
M11
M12
M13
M14
M15
M16
M17
M18
M19
M20
· O n e-tou ch m em ory k eyb oard
R1
R2
R3
R4
R5
C1
C2 C3 C4 C5 C7 C8C6
SA
1
2
4
5
7
8
*
0
P®T
3
6
9
ST
R/P
#
HT9320
M6
M7
M8
M9
M10
M11
M12
M13
M14
M15
M16
M17
M18
M19
M20
M1
M2
F
M3
M4
M5
· T w o-tou ch m em ory k eyboa rd
C1
C2 C3 C4 C5 C6
M6/
ST
M1/
M16
M11
M7/
M2/
F
R
M12
M3/
M13
M4/
M14
M5/
M15
M17
M8/
M18
M9/
M19
M 10/
M20
R1
R2
R3
R4
R5
SA
*/T
P
PAGE
2
1
4
7
3
5
6
8
9
0
#
· T h ree-touch m em ory k eyboard
C1
C2 C3 C4
R1
R2
R3
R4
R5
SA
*/T
P
PAGE
2
1
4
7
3
F
5
6
A
8
9
ST
0
#
R
Memory dialing vs. keyboard form table
Dialing
Output
One-Touch
Memory Keyboard
· T w o-tou ch m em ory k eyboa rd
C1
R1
SA
R2
1
R3
4
7
R4
*
R5
· T h ree-touch m em ory k eyboard
C1
R1
SA
R2
1
R3
4
7
R4
*
R5
Two-Touch
Memory Keyboard
C2 C3 C4 C5 C6
M6/
M1/
P®T
PAGE
2
3
5
6
8
9
0
#
C2 C3 C4
PAGE
2
3
5
6
8
9
0
#
R/P
P®T
R/P
ST
ST
M11
M16
M7/
M2/
F
M12
M17
M8/
M3/
A
M13
M18
M9/
M4/
M14
M19
M 10/
M5/
M15
M20
F
A
Three-Touch
Memory Keyboard
M1~M10 M1 ~ M10 A a (a=1~9, 0)
M11~M20 M11 ~ M20 PAGE Ma (Ma=M1~M10) A PAGE a (a=1~9, 0)
4 July 21, 1999
Pin Description
HT9320
Pin Name I/O
~C8
C1
R1~R5
X1 I
X2 O
XMUTE
HKS
PO
I/O
O NMOS OUT
I CMOS IN
O CMOS OUT
Internal
Connection
CMOS
IN/OUT
OSCILLATOR
Description
These pins form a 5´8 keyboard matrix which can perform
keyboard input detection and dialing specification setting
functions. When on-hook (HKS
While off-hook the column group (C1
row group (R1
For the HT9320L-X, the column group remains high and the
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
and the necessary load capacitor on chip. Connecting a stan
dard 3.579545MHz crystal or ceramic resonator to the X1 and
X2 terminals can implement the oscillator function. The oscil
lator is turned off in the standby mode, and is actuated when
ever a keyboard entry is detected.
XMUTE
ing dialing signal transmission. Otherwise, it is an open circuit. XMUTE
transmitting the dial signal.
This pin is used to monitor the status of the hook-switch and its
combination with HFI/HDI
makeorbreaktheline.
HKS
=VDD:On-hookstate(PO=low).ExceptforHFI/HDI
HKS=VSS:Off-hookstate(PO
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)
and HFO/HDO is low. PO
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.
~R5) is set high for key input detection.
is an NMOS open drain structure pulled to VSS dur-
is used to mute the speech circuit when
(hand-free/hold-lineco ntrolinput),other
functionsarealldisabled.
bymodeandreadytoreceivethekeyinput.
=high) all the pins are set high.
~C8) remains low and the
can control the PO pin output to
=high).The chipisinthestand-
outputs a high to make line when
-
-
-
-
-
-
-
5 July 21, 1999
HT9320
Pin Name I/O
MODE I/O
DTMF O CMOS OUT
HDI
HDO O CMOS OUT
HFI I
HFO O CMOS OUT
DOUT O NMOS OUT
Connection
I
Internal
CMOS
IN/OUT
CMOS IN
Pull-high
CMOS IN
Pull-low
Description
This is a three-state input/output pin, used for dialing mode
selection, either Tone mode or Pulse mode, 10pps/20pps
MODE=VDD: Pulse mode, 10pps
MODE=OPEN: Pulse mode, 20pps
MODE=VSS: Tone mode
During the pulse mode dialing, switching this pin to the tone
mode changes the subsequent digit entry to the tone mode.
When the chips are in tone mode, switching to the pulse mode
will also be recognized.
This pin is active only when the chip transmits tone dialing
signals. Otherwise, it always outputs a low. The pin outputs
tone signals to drive the external transmitter amplifier cir
cuit. The load resistor should not be less than 5kW.
This pin is a schmitt trigger input structure. Active low. Ap
plying a negative going pulse to this pin can toggle the HDO out
put once.
An external RC network is recommended for input
debouncing. The pull-high resistance is 200kW typ.
The HDO is a CMOS output structure. Its output is toggle- con
trolled by a negative transition on HDI
high, PO
leased by setting HFO high or by an on-off hook operation or by
another HDI
series melody generator to produce a hold-line background melody. Refer to the functional description for the hold-line function.
This pin is a schmitt trigger input structure. Active high. Applying a positive going pulse to HFI can toggle the HFO once
and hence control the hand-free function.
An external RC network is recommended for input
debouncing. The pull-low resistance of HFI is 200kW typ.
The HFO is a CMOS output structure. Its output is togglecontrolled by a positive transition on the HFI pin. When HFO
is high, the hand-free function is enabled and PO
high to connect the line.
The hand-free function can be released by an on-off-hook oper
ation or by another HFI input or by setting HDO high. Refer to
the functional description for the hand-free function opera
tion.
NMOS open drain output pin. It outputs the BCD code of the
dialing digits to the LCD driver chip (HT16XX series) or mC for
dialing number display. Refer to the functional description for
the detailed timing.
keeps high to hold the line. The hold function can be re
input. The HDO pin can directly drive the HT3810
. When HDO is toggled
outputs a
-
-
-
-
-
-
-
6 July 21, 1999
HT9320
Pin Name I/O
Internal
Connection
NMOS open drain output. When dialing, it outputs a series of
CLOCK O NMOS OUT
pulse trains for DOUT data synchronization. DOUT data is
valid at the falling edge of clock.
VDD I
VSS I
¾
¾
Positive power supply, 2.0V~5.5V for normal operation
Negative power supply
CMOS IN
Pull-low
(HT9320A)
HST I
CMOS IN
(HT9320H)
CMOS IN
Pull-high
(HT9320A)
M/B
I
CMOS IN
(HT9320H)
KT O CMOS OUT
On-hook store enable input
HST=VDD: On-hook store (HT9320A/H)
HST=Floating: Off-hook store (HT9320A)
HST=VSS: Off-hook store (HT9320H)
The Pull-low resistance is 200kW typ.
Make/Break ratio selection
M/B
M/B
M/B
M/B
The pull-high resistance is 200kW typ.
Keytone output pin. Outputs a 1.2kHz tone carrier for 34ms
each time a key is pressed in the pulse mode.
Approximate internal connection circuits
Description
=VSS: 33.3/66.6 (HT9320A)
=Floating: 40/60 (HT9320A)
=VDD: 33.3/66.6 (HT9320H)
=VSS: 40/60 (HT9320H)
CMOS IN/O UT CMOS OUT
VDD
CMOS IN
Pull-low
NMOS OUT
X1
20pF
OSCILLATOR
10M
CMOS IN
VDD
X2
10pF
EN
7 July 21, 1999
CMOS IN
Pull-high
Absolute Maximum Ratings
HT9320
Supply Voltage ................................-0.3V to 6V
Input Voltage .................. V
-0.3 to VDD+0.3V
SS
Storage Temperature ................-50°Cto125°C
Operating Temperature .............-20°Cto75°C
Note: These are stress ratings only. Stresses exceeding the range specified under ²Absolute Maxi
mum Ratings² may cause substantial damage to the device. Functional operation of this device
at other conditions beyond those listed in the specification is not implied and prolonged expo
sure to extreme conditions may affect device reliability.
Electrical Characteristics
Symbol Parameter
V
I
DD
I
STB
V
I
R
V
V
I
XMO
I
OLXM
I
HKS
R
R
R
R
I
OH1
I
OL1
I
OH2
I
OL2
I
OH3
I
OL3
I
OH4
I
OL4
Operating Voltage
DD
Operating Current 2.5V
Standby Current 1V
Memory Retention Voltage
R
Memory Retention Current 1V On-hook
Input Low Voltage
IL
Input High Voltage
IH
XMUTE Leakage Current
XMUTE Sink Current 2.5V
HKS Pin Input Current 2.5V
HFI Pull-low Resistance 2.5V
HFI
HDI Pull-high Resistance 2.5V
HDI
M/B Pull-high Resistance 2.5V
M/B
HST Pull-low Resistance 2.5V
HST
Keypad Pin Source Current 2.5V
Keypad Pin Sink Current 2.5V
HFO Pin Source Current 2.5V
HFO Pin Sink Current 2.5V
HDO Pin Source Current 2.5V
HDO Pin Sink Current 2.5V
KT Pin Source Current 2.5V
KT Pin Sink Current 2.5V
Test Conditions
V
DD
Conditions
¾¾
Pulse
Tone
Off-hook
Keypad entry
No load
On-hook, no load
No entry
¾¾
¾¾
¾¾
XMUTE
XMUTE
=2.5V
HKS
=2.5V
HFI
=0V
HDI
=0V
M/B
=2.5V
HST
=0V
OH
=2.5V
OL
=2V
OH
=0.5V
OL
=2V
OH
=0.5V
OL
=2V
OH
=0.5V
OL
=12V
=0.5V
¾
V
No entry
V
V
V
V
V
V
V
V
V
V
V
V
V
V
f
=3.5795MHz, Ta=25°C
OSC
Min. Typ. Max. Unit
2
¾
¾
¾
0.2 1 mA
0.6 2 mA
¾¾
1
¾
V
0.8V
SS
DD
¾
0.1 0.2
¾
¾
¾¾
1
¾¾
¾¾
¾
¾
¾
¾
200
200
200
200
5.5 V
1
5.5 V
0.2V
DD
V
DD
1
0.1
¾ kW
¾ kW
¾ kW
¾ kW
mA
-4 ¾-40 mA
200 400
-1 ¾¾
1
¾¾
-1 ¾¾
1
¾¾
-1 ¾¾
1
¾¾
¾mA
mA
mA
mA
mA
mA
mA
mA
mA
V
V
mA
mA
-
-
8 July 21, 1999
HT9320
Symbol Parameter
T
T
T
T
f
OSC
FP
RP
DB
BRK
Pause Time After Flash
Pause Time for One-key
Redialing
Key-in Debounce Time
Break Time for One-key
Redialing
System Frequency
Test Conditions
V
DD
¾
¾
¾¾ ¾20¾
¾
¾
Pulse Mode Electrical Characteristics
Symbol Parameter
I
I
POH
POL
PO Output Source
Current
PO Output Sink
Current
PR Pulse Rate
M/B Make/Break Ratio
PDP
Pre-digit-pause
Time
T
V
DD
2.5V
2.5V
¾
¾
¾
Test Conditions
=2V
V
OH
=0.5V
V
OL
MODE pin is connected to V
MODE pin is opened
A resistor is linked between
and C1 (HT9320B/C/K/L)
R2
=VSS (HT9320A)
M/B
M/B
=VDD (HT9320H)
No resistor is linked between
R2
and C1 (HT9320B/C/K/L)
=Floating (HT9320A)
M/B
M/B
=VSS (HT9320H)
M/B ratio=40:60
M/B ratio=33:66
Conditions
Control key
Digit key
One-key redialing
Min. Typ. Max. Unit
¾
¾
¾
0.2
1
1
¾
¾
¾
s
s
s
ms
One-key redialing
¾
1.2
¾
s
Crystal=3.5795MHz 3.5759 3.5795 3.5831 MHz
f
=3.5795MHz, Ta=25°C
OSC
Conditions
Min. Typ. Max. Unit
-0.2 ¾¾
0.2 0.6
DD
¾
¾
¾
10
20
33:66
¾
¾
¾
¾
mA
mA
pps
%
¾
¾
¾
40:60
40 (10pps)
20 (20pps)
33 (10pps)
17 (20pps)
¾
¾
ms
¾
9 July 21, 1999
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