HT9315 Series
15-Memory Tone/Pulse Dialer
Patent Number: 64097, 86474, 113235(R.O.C.), 5424740(U.S.A.)
Features
·
Universal specification
·
Operating voltage: 2.0V~5.5V
·
Low standby current
·
Low memory retention current: 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
·
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
-
Keyboard form
·
HT9315A/HT9315AL: 18-pin DIP package
HT9315B/HT9315BL: 22-pin SKDIP package
HT9315C/HT9315CL: 20-pin DIP package
HT9315D/HT9315DL: 24-pin SKDIP package
General Description
The HT9315 series tone/pulse dialers are CMOS LSIs for
telecommunication systems. They are designed to meet
various dialing specifications through resistor option ma-
trix.
The HT9315 series are offered in two different ver-
sions. They are HT9315x normal version and
HT9315xL lock version, with keyboard-operated IDD
lock function. The two versions also supply the follow-
ing functions: Hold-line, Hand-free and LCD dialing
number display interface, all of which are suitable for
feature phone applications.
Selection Table
Function
Item
HT9315x
HT9315A
HT9315B
HT9315C
HT9315D
HT9315xL
HT9315AL
HT9315BL
HT9315CL
HT9315DL
Lock
Function
(Normal version)
¾
¾
¾
¾
¾
Ö
¾
Ö
¾
Ö
¾
Ö
¾
¾
Ö
Ö
98ms
20 DIP
24 SKDIP
18 DIP
22 SKDIP
Hold-Line
Hand-Free
LCD
Interface
Min.
Flash Time
Package
(Mechanical and Keyboard Operated Lock Version)
Lock 0
Lock 0, 9
Lock All
Keyboard
Operated Lock
¾
Ö
¾
Ö
¾
Ö
¾
Ö
¾
¾
Ö
Ö
98ms
20 DIP
24 SKDIP
18 DIP
22 SKDIP
Rev. 1.20
1
October 1, 2002
HT9315 Series
Block Diagram
C 1
K e y
C o lu m n
C 5
. S M
C o n tro l
C h e c k
D O U T
C L O C K
T o n e
O u t
P u ls e
O u t
D T M .
P O
X M U T E
K e y
. u n c tio n
E n c o d e r
W R M
C o u n te r
S R A M
T o n e
E n c o d e r
C o n v e rte r
A D D R L
R 1
K e y R o w
R 4
E n c o d e r
. la s h
D e b o u n c e
M o d e In
H D /H .
H K S
H . I
H D I
H D O
H . O
M O D E
X 1
X 2
D iv id e r
C lo c k
G e n e ra to r
M /B
T im e r
K e y to n e
G e n e ra to r
Pin Assignment
HT9315x/xL version
H D I
H D I
C 1
C 1
1
2
3
4
5
6
7
8
9
C 2
C 3
C 4
C 5
X 1
X 2
X M U T E
V S S
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
1 0
R 4
R 3
R 2
R 1
M O D E
D T M .
P O
H K S
V D D
C 2
C 3
C 4
C 5
X 1
X 2
X M U T E
V S S
H . I
9
1 0
1 1
8
7
6
5
4
3
2
1
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1
2
3
4
5
6
7
8
9
1 0
1 1
1 2
2 4
2 3
2 2
2 1
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
H D O
R 4
R 3
R 2
R 1
M O D E
D T M .
P O
H K S
V D D
H . O
C L O C K
H D O
R 4
R 3
R 2
R 1
M O D E
D T M .
P O
H K S
V D D
H . O
C 1
1
2
3
4
5
6
7
8
9
1 0
C 2
C 3
C 4
C 5
X 1
X 2
X M U T E
V S S
D O U T
2 0
1 9
1 8
1 7
1 6
1 5
1 4
1 3
1 2
1 1
C 1
R 4
R 3
R 2
R 1
M O D E
D T M .
P O
H K S
V D D
C L O C K
C 2
C 3
C 4
C 5
X 1
X 2
X M U T E
V S S
H . I
D O U T
H T 9 3 1 5 A /A L
1 8 D IP -A
H T 9 3 1 5 B /B L
2 2 S K D IP -A
H T 9 3 1 5 C /C L
2 0 D IP -A
H T 9 3 1 5 D /D L
2 4 S K D IP -A
Keyboard Information
. o rm
A
C 1
R 1
1
4
7
* /T
0
#
8
9
5
6
A
R /P
R 2
R 3
R 4
C 2
2
3
C 3
C 4
S A
.
C 5
E M 1
E M 2
E M 3
S T
R 1
R 2
R 3
R 4
7
* /T
0
#
R
4
8
9
A
. o rm
B
C 1
1
5
6
.
C 2
2
3
P
C 3
C 4
C 5
E M 1
E M 2
E M 3
S T
Rev. 1.20
2
October 1, 2002
HT9315 Series
Pin Description
Pin Name
I/O
Internal
Connection
Description
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.
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 os-
cillator 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 key-
board information for keyboard arrangement and to the functional description for dial-
ing specification selection.
C1~C5
R1~R4
I/O
CMOS
IN/OUT
X1
I
X2
O
The system oscillator consists of an inverter, a bias resistor and the necessary
load capacitor on chip. Connecting a standard 3.579545MHz crystal or ceramic
OSCILLATOR resonator to the X1 and X2 terminals can implement the oscillator function. The
oscillator is turned off in the standby mode, and is actuated whenever a keyboard
entry is detected.
NMOS OUT
XMUTE is an NMOS open drain structure pulled to VSS 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.
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.
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 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.
This is a three-state input/output pin, use 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 tone mode. When the chips are in tone mode, switching
to 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 circuit. The load resistor should not be less than 5kW.
This pin is a Schmitt trigger input structure. Active low. Applying a negative going
pulse to this pin can toggle the HDO output once.
An external RC network is recommended for input debouncing. The pull-high re-
sistance is 200kW typ.
The HDO is a CMOS output structure. Its output is toggle- controlled by a negative
transition on HDI. When HDO is toggled high, PO keeps high to hold the line. The
hold function can be released by setting HFO high or by an on/off hook operation
or by another HDI input. Refer to the functional description for the hold-line func-
tion.
XMUTE
O
HKS
I
CMOS IN
PO
O
CMOS OUT
MODE
I/O
CMOS
IN/OUT
DTMF
O
CMOS OUT
HDI
I
CMOS IN
Pull-High
HDO
O
CMOS OUT
Rev. 1.20
3
October 1, 2002
HT9315 Series
Pin Name
I/O
Internal
Connection
CMOS IN
Pull-Low
Description
This pin is a Schmitt trigger input structure. Active high. Applying a positive pulse
to HFI can toggle the HFO once and hence control the hand-free function. The
pull-low resistance of HFI is 200kW typ.
An external RC network is recommended for input debouncing.
The HFO is a CMOS output structure. Its output is toggle- controlled by a positive
transition on HFI pin. When HFO is high, the hand-free function is enabled and PO
outputs a high to connect the line.
The hand-free function can be released by setting HDO high or by an on-off-hook op-
eration or by another HFI input. Refer to the functional description for the hand-free
functional operation.
NMOS open drain output pin. It outputs the BCD code of the dialing digits to the
LCD driver chip (HT16XX series) or MCU for dialing number display. Refer to the
functional description for the detailed timing.
NMOS open drain output. When dialing, it outputs a series of pulse trains for
DOUT data synchronization. DOUT data is valid at the falling edge of the clock.
Positive power supply, 2.0V~5.5V for normal operation
Negative power supply, ground
HFI
I
HFO
O
CMOS OUT
DOUT
O
NMOS OUT
CLOCK
VDD
VSS
O
¾
¾
NMOS OUT
¾
¾
Approximate internal connection circuits
C M O S IN /O U T
V D D
N M O S O U T
C M O S IN
C M O S O U T
V D D
C M O S IN
P u ll- H ig h
C M O S IN
P u ll- L o w
X 1
2 0 P
O S C IL L A T O R
X 2
1 0 M
1 0 P
E N
Absolute Maximum Ratings
Supply Voltage ...........................................-0.3V to 6V
Storage Temperature ...........................-50°C to 125°C
Input Voltage .............................. V
SS
-0.3
to V
DD
+0.3V
Operating Temperature ..........................-20°C to 75°C
Note: These are stress ratings only. Stresses exceeding the range specified under
²Absolute
Maximum 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 exposure to extreme conditions may affect device reliabil-
ity.
Rev. 1.20
4
October 1, 2002
HT9315 Series
Electrical Characteristics
Symbol
V
DD
I
DD
Parameter
Operating Voltage
Operating Current
Test Conditions
V
DD
¾
Pulse
2.5V
Tone
I
STB
V
R
I
R
V
IL
V
IH
I
XMO
I
OLXM
I
HKS
R
HFI
R
HDI
I
OH1
I
OL1
I
OH2
I
OL2
I
OH3
I
OL3
T
FP
T
RP
T
DB
T
BRK
F
OSC
Standby Current
Memory Retention Voltage
Memory Retention Current
Input Low Voltage
Input High Voltage
XMUTE Leakage Current
XMUTE Sink Current
HKS Pin Input Current
HFI Pull-Low Resistance
HDI Pull-High Resistance
Keypad Pin Source Current
Keypad Pin Sink Current
HFO Pin Source Current
HFO Pin Sink Current
HDO Pin Source Current
HDO Pin Sink Current
Pause Time After Flash
One-key Redialing Pause Time
Key-in Debounce Time
Break Time for One-key Redialing
System Frequency
1V
¾
1V
¾
¾
¾
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
2.5V
¾
¾
¾
¾
¾
On-hook
¾
¾
V
XMUTE
=12V, No entry
V
XMUTE
=0.5V
V
HKS
=2.5V
V
HFI
=2.5V
V
HDI
=0V
V
OH
=0V
V
OL
=2.5V
V
OH
=2V
V
OL
=0.5V
V
OH
=2V
V
OL
=0.5V
Control key
Digit key
One-key redialing
¾
One-key redialing
Crystal=3.5795MHz
Conditions
¾
Off-hook
Keypad entry
No load
Min.
2
¾
¾
¾
1
¾
V
SS
0.8V
DD
¾
1
¾
¾
¾
-4
200
-1
1
-1
1
¾
¾
¾
¾
¾
3.5759
0.1
¾
¾
¾
¾
¾
200
200
¾
400
¾
¾
¾
¾
0.2
1
1
20
1.2
3.5795
F
OSC
=3.5795MHz, Ta=25°C
Typ.
¾
0.2
0.6
¾
Max.
5.5
1
2
1
5.5
0.2
0.2V
DD
V
DD
1
¾
0.1
¾
¾
-40
¾
¾
¾
¾
¾
¾
¾
¾
¾
¾
3.5831
Unit
V
mA
mA
mA
V
mA
V
V
mA
mA
mA
kW
kW
mA
mA
mA
mA
mA
mA
s
s
ms
s
MHz
On-hook, no load
No entry
¾
Rev. 1.20
5
October 1, 2002
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