SILAN SC9302A, SC9302B, SC9302C, SC9302D Datasheet
Silan
Semiconductors
1-MEMORY/2-MEMORY TONE/PULSE
DIALER
DESCRIPTION
The SC9302 series tone/pulse dialers are CMOS LSIs for the
telecommunication system. They are designed to meet various
dialing specifications through resistor options matrix.
The SC9302 series tone/pulse dialers are offered in four different
versions. They are SC9302X normal version, SC9302/F/G/H simple
version, SC9302XT key-tone version and SC9302XLT key-tone/lock
functions version. The SC9302X normal version provides the pin-
selected lock function; the SC9302XT version provides the key-tone
function; the SC9302XLT version provides both the key-tone function
and key board-operated IDD lock function. All of the above three
versions also supply the following functions: Hold-line, Hand-free and
LCD dialing number display interface, all of which are suitable for
feature phone applications. However, the SC9302F/G/H version is
simpler than the other three versions. It provides only a redialing
memory for a simple low-cost system application.
FEATURES
*Universal specification
*Operating voltage: 2.0V~5.5V
*Low stand-by 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
*4x4 keyboard matrix
*3.58MHz crystal or ceramic resonator
SC9302 Series
SDIP-24
SC9302D Package
*Hand-free control
*Hold-line control
*Pause, P→T can be saved for redialing
*Lock function
*Key tone function
*Resistor options:
-M/B ratio
-Flash function and flash time
-Pause and P→T duration
-Pulse number
-Keyboard operated IDD lock function
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Semiconductors
PIN CONFIGURATIONS
SC9302X NORMAL VERSION
C1
C2
C3
C4
LOCK
X1
X2
XMUTE
SS
V
1
2
3
4
5
6
7
8
9
18
17
16
15
14
SC9302A
13
12
11
10
R4
R3
R2
R1
MODE
DTMF
PO
HKS
V
DD
1
HDI
2
C1
3
C2
4
C3
5
C4
LOCK
6
X1
7
8
X2
9
XMUTE
SS
V
11
HFI HFO
10
22
21
20
19
18
17
SC9302B
16
15
14
13
12
HDO
R4
C1
R3
C2
R2
C3
R1
C4
MODE
LOCK
DTMF
X1
X2
PO
XMUTE
HKS
SS
V
V
DD
DOUT CLOCK
SC9302 Series
1
HDI
2
C1
1
2
3
4
5
6
7
8
9
20
19
18
17
16
15
SC9302C
14
13
12
1110
R4
R3
R2
R1
MODE
DTMF
PO
HKS
V
DD
3
C2
4
C3
5
C4
LOCK
6
X1
7
SC9302D
8
X2
9
XMUTE
SS
V
11
HFI HFO
10
DOUT CLOCK
HDO
24
23
R4
22
R3
21
R2
R1
20
MODE
19
DTMF
18
17
PO
16
HKS
V
DD
15
14
1312
SC9302A
DIP-18
SC9302XT/XLT VERSION
C1
C2
C3
C4
KT
X1
X2
XMUTE
V
SS
1
2
3
4
5
6
7
8
9
SC9302AT/ALT
SC9302AT/ALT
DIP-18
18
R4
17
R3
16
R2
15
R1
MODE
14
DTMF
13
12
PO
11
HKS
V
DD
10
SC9302B
SDIP-22
1
HDI
2
C1
3
C2
4
C3
5
C4
KT
6
X1
7
8
X2
9
XMUTE
SS
V
11
HFI HFO
10
22
21
20
19
18
17
16
SC9302BT/BLT
15
14
13
12
SC9302BT/BLT
SDIP-22
HDO
R4
C1
R3
C2
R2
C3
R1
C4
MODE
KT
DTMF
X1
X2
PO
XMUTE
HKS
SS
V
V
DD
DOUT CLOCK
SC9302C
DIP-20
1
2
3
4
5
6
SC9302CT/CLT
7
8
9
SC9302CT/CLT
DIP-20
SC9302D
SDIP-24
1
HDI
2
C1
20
R4
19
R3
18
R2
17
R1
MODE
16
DTMF
15
14
PO
13
HKS
V
DD
12
1110
3
C2
4
C3
5
C4
KT
6
X1
7
SC9302DT/DLT
8
X2
9
XMUTE
SS
V
11
HFI HFO
10
DOUT CLOCK
SC9302DT/DLT
SDIP-24
HDO
24
23
R4
22
R3
21
R2
20
R1
MODE
19
DTMF
18
17
PO
16
HKS
15
V
DD
14
1312
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Semiconductors
SC9302F/G/H SIMPLE VERSION
C1
C2
C3
C4
NC
X1
X2
XMUTE
V
SS
1
2
3
4
5
6
7
8
9
18
17
16
15
14
SC9302F/H
13
12
11
10
R4
R3
R2
R1
MODE
DTMF
PO
HKS
V
DD
C1
C2
C3
X1
X2
XMUTE
V
SS
V
DD
SC9302 Series
1
2
3
4
5
6
7
8 9
16
15
14
13
12
SC9302G
11
10
R4
R3
R2
R1
MODE
DTMF
PO
HKS
BLOCK DIAGRAM
C1
C2
C3
C4
R1
R2
R3
R4
X1
X2
Key
Column
Key
Row
Divider
FSM
Key
Function
Encoder
Encoder
Debounce
Clock
Generator
SC9302F/H
DIP-18
Control
ADDRL
WRM
Counter
Clock
Control
M/B
SRAM
SC9302G
Flash
Timer
DIP-16
Check
Tone
Encoder
Converter
Mode In
Tone Out
Pulse Out
HD/HF
Key-tone
Generater
DOUT
CLOCK
DTMF
PO
XMUTE
HKS
HFI
HDI
HDO
HFO
MODE
KT
LOCK
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Semiconductors
KEYBOARD INFORMATION
SC9302X and SC9302XT SC9302XLT
C4C3C2C1
SC9302 Series
C4 C3 C2 C1STHKS
R1
R2
R3
R4
R1
R2
R3
R4
SC9302G
*/T
*/T
R1
R2
R3
R4
R1
R2
R3
R4
SA
3
2
1
F
6
5
4
P
9
8
7
R
#
0
*/T
SC9302HSC9302F
C4C3C2C1
3
2
1
F
6
5
4
9
8
7
R/P
#
0
*/T
SA
3
2
1
F
6
5
4
P
9
8
7
R
#
0
C4C3C2C1
3
2
1
F
6
5
4
P
9
8
7
R
#
0
C3C2C1 HKS
3
2
*/T
1
F
6
5
4
P
9
8
7
R
#
0
R1
R2
R3
R4
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SELECTION TABLE
Function Lock Function
Keytone
Item
SC9302X (Normal version)
SC9302A --
SC9302B --
SC9302C --
SC9302D --
SC9302XT(Key-tone version)
SC9302AT
SC9302BT
SC9302CT
SC9302DT
SC9302XLT (Key-tone/Lock function version)
SC9302ALT
SC9302BLT
SC9302CLT
SC9302DLT
SC9302F/G/H (Simple version)
SC9302F -- -- -- -- -- -- 1 DIP-18
SC9302G -- -- -- -- -- -- 1 DIP-16
SC9302H -- -- -- -- -- -- 1 DIP-18
√
√
√
√
√
√
√
√
Pin
Selection
Keyboard
Operated
√
√
√
√
-- -- -- -- -- 2 DIP-18
-- --
-- -- -- --
-- --
--
--
--
--
-- -- -- -- 2 DIP-18
--
-- -- --
--
√
√ √ √
√
√ √ √ √
Hold-line Hand-free
√ √
√ √ √
√ √
√ √ √
-- -- -- 2 DIP-18
-- --
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Value Unit
Supply Voltage VDD -0.3 ~ 5.5 V
Input Voltage VIN Vss-0.3V ~ VCC+0.3V V
Operating Temperature Topr -20 ~ +75
Storage Temperature Tstg -50 ~ +125
(Tamb=25°C, fosc=3.5795MHz,unless otherwise specified)
SC9302 Series
LCD
Interface
-- 2 SDIP-22
√
-- 2 SDIP-22
√
-- 2 SDIP-22
√
Memory
No.
2 DIP-20
2 SDIP-24
2 DIP-20
2 SDIP-24
2 DIP-20
2 SDIP-24
°C
°C
Package
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Semiconductors
ELECTRICAL CHARACTERISTICS
Parameter Symbol
Operating Voltage VDD -- -- 2 -- 5.5 V
Operating Current IDD 2.5V
Stand-by Current I
Memory Retention Voltage VR -- -- 1 -- 5.5 V
Memory Retention Current IR 1V On-hook -- 0.1 0.2
Input Low Voltage VIL -- -- Vss -- 0.2 VDD V
Input High Voltage VIH -- -- 0.8 VDD -- VDD V
Leakage current
XMUTE
Sink Current
XMUTE
HKS
Pin Input Current
HFI Pull-Low Resistance R
Pull-High Resistance R
HDI
Keypad Pin Source Current I
Keypad Pin Sink Current I
HFO Pin Source Current I
HFO Pin Sink Current I
HDO Pin Source Current I
HDO Pin Sink Current I
Pause Time After Flash TFP --
One-key Redialing Pause Time TRP -- One-key redialing -- 1 -- s
Key-in Debounce Time TDB -- -- -- 20 -- ms
Break Time for One-key Redialing T
Key-tone Duration TKT -- -- 34 -- -- ms
Key-tone Frequency F
System Frequency Fosc -- Crystal =3.5795MHz 3.5759 3.5795 3.5831 MHz
STB
I
XMO
I
OLXM
I
HKS
OH1
OL1
OH2
OL2
OH3
OL3
BRK
KTC
(Tamb=25°C, fosc=3.5795MHz,unless otherwise specified)
Test Conditions
V
Condition
DD
Pulse -- 0.2 1 mA
Tone
1V
--
2.5V
2.5V V
HFI
HDI
2.5V V
2.5V V
2.5V V
2.5V V
2.5V V
2.5V V
On-hook, no load,
No entry
V
No entry
V
V
2.5V
HFI
V
2.5V
OH
OL
OH
OL
OH
OL
XMUTE
XMUTE
=2.5V
HKS
=2.5V -- 200 --
=0V
HDI
=0V -4 -- -40
=2.5V 200 400 --
=2V -1 -- -- mA
=0.5V 1 -- -- mA
=2V -1 -- -- mA
=0.5V 1 -- -- mA
Control key -- 0.2 --
Digit key -- 1 --
-- One-key redialing -- 1.2 -- s
-- -- 1.2 -- -- KHz
SC9302 Series
Min Typ Max Unit
Off-hook
Keypad entry
No load
=12V,
=0.5V
-- 0.6 2 mA
-- -- 1
-- -- 1
1 -- -- mA
-- -- 0.1
-- 200 --
µA
µA
µA
µA
kΩ
kΩ
µA
µA
s
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PULSE MODE ELECTRICAL CHARACTERISTICS
(Tamb=25°C, fosc=3.5795MHz,unless otherwise specified)
Parameter Symbol
Output Source Current
PO
Output Sink Current
PO
Pulse Rate PR --
Make/Break Ratio M/B --
Pre-digit-pause Time T
Inter-digit-pause Time T
Pulse Make Duration TM --
Pulse Break Duration TB --
Test Conditions
Condition
V
DD
I
2.5V VOH =2V -0.2 -- -- mA
POH
I
2.5V VOL =0.5V 0.2 0.6 -- mA
POL
MODE pin is
connected to V
MODE pin is opened. -- 20 --
A resistor is linked
--
PDP
--
IDP
between
No resistor is linked
between
M/B ratio =40:60 --
M/B ratio =33:66 --
Pulse rate =10pps -- 800 --
Pulse rate =20pps -- 500 --
A resistor is linked
between
No resistor is linked
between
A resistor is linked
between
No resistor is linked
between
2R
2R
2R
2R
2R
2R
SC9302 Series
Min Typ Max Unit
-- 10 --
DD
and 1C.
and 1C.
and 1C.
and 1C.
and 1C.
and 1C.
-- 33:66 --
-- 40:60 --
40(10pps)
20(20pps)
33(10pps)
17(20pps)
33(10pps)
-17(20pps)
40(10pps)
-20(20pps)
66(10pps)
-33(20pps)
60(10ps)
-30(20pps)
--
--
--
--
--
--
pps
%
ms
ms
ms
ms
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TONE MODE ELECTRICAL CHARACTERISTICS
(Tamb=25°C, fosc=3.5795MHz,unless otherwise specified)
Parameter Symbol
DTMF Output DC Level V
DTMF Sink Current I
DTMF Output AC Level V
DTMF Output Load RL 2.5V
Column Pre-emphasis ACR 2.5V Row group = 0dB 1 2 3 dB
Tone Signal Distortion THD 2.5V
Minimum Tone Duration T
Minimum Inter-tone Pause T
THD (Distortion)(dB)=20log
Vi, Vh: Row group and column group signals
V
, …Vn: Harmonic signals (BW=300Hz~3500Hz)
1,V2
TDC
TOL
TAC
TMIN
ITPM
2
2
2
1
V
-- -- 0.45VDD -- 0.7VDD V
2.5V V
--
-- Auto-redial
-- Auto-redial
2
n
Test Conditions
Condition
DD
=0.5V 0.1 -- -- mA
DTMF
Row group, R
THD ≤ -23dB
R
=5kΩ
L
2
2
)V+V/V+...+V+V(
h
i
APPROXIMATE INTERNAL CONNECTION CIRCUITS
V
DD
NMOS OUTCMOS IN/OUT
CMOS IN CMOS OUT
SC9302 Series
Min Typ Max Unit
=5kΩ
L
Others -- 82.5 --
9302G -- 100 --
Others -- 85.5 --
9302G -- 106 --
0.12 0.155 0.18 Vrms
5 -- --
-- -30 -23 dB
CMOS IN
V
DD
Pull-High
V
DD
kΩ
ms
ms
CMOS IN
Pull-Low
OSCILLATOR
X1 X2
10MΩ
10pF20pF
EN
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PIN DESCRIPTION
Pin Name I/O
1C~4C
~4R
1R
X1 I
X2 O
XMUTE
HKS
HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD
I/O
O NMOS OUT
I CMOS IN
Internal
Connection
CMOS
IN/OUT
OSCILLATOR
SC9302 Series
Description
These pins construct a 4x4 keyboard matrix to perform the keyboard
input detecting and dialing specification setting functions, when on-hook
=high) all the pins are set to high. While off-hook the column
(
HKS
group (
for key input detecting.
An inexpensive single contact 4x4 keyboard can be an input device.
Pressing a key connects a single column to a single row, and actuates
the system oscillator to result in a dialing signal output. If more than two
keys are pressed at the same time, no response can be brought about.
The key-in debounce time is 20ms. Refer to the keyboard table for
keyboard arrangement and to the functional description for dialing
specification selection.
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 resonator to X1 and X2 terminals can implement the
oscillator function. The oscillator is turned off in the stand-by mode, and
is actuated whenever a keyboard entry is detected.
The
XMUTE
dialing signal transmitting. Otherwise, it is an open circuit. The
XMUTE
signal.
This pin is used to monitor the status of the hook-switch and its
combination with HFI/
break the line.
=VDD: On-hook state (PO=low). Except HFI/
HKS
/ hold-line control input), other functions are all disabled.
=VSS: Off-hook state (PO=high). The chip is in the stand-by
HKS
mode and ready to receive the key input.
) stays low and the row group (1R~4R) is set to high
1C~4C
is an NMOS open drain structure pulled to VSS during
is used to mute the speech circuit when transmitting the dial
can control the PO pin output to make or
HDI
(hand-free
HDI
(to be continued)
Rev: 2.0 2001-11-01
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Semiconductors
(continued)
PO
MODE I/O
DTMF O CMOS OUT
HDI
HDO O CMOS OUT
KT O CMOS OUT
O CMOS OUT
I
CMOS IN
CMOS
IN/OUT
Pull-High
This pin is a CMOS output structure, it receives
signals to control the dialer so as to connect or disconnect the
telephone line.
outputs low to break line when
PO
HFO/HDO is low.
hook) or HFO is high or HDO is high.
During the off-hook state, the 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, provided to the user for selecting a
dialing mode among Tone/20pps/10pps.
MODE=V
MODE=OPEN: Pulse mode, 20pps.
MODE=V
During the pulse mode dialing, switching this pin to the tone mode
changes the following entrance of digits to the tone mode. When the
chips are working in the tone mode, the switching from tone to the pulse
mode will be recognized.
This pin is active only when the chip transmits tone dialing signals.
Otherwise, it always outputs low. The pin outputs tone signals to drive
the external transmitter amplifier circuit. The load resistor should not be
less than 5kΩ.
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 to use for the input
debouncing. The pull-high resistance is 200kΩ typically.
The HDO is a CMOS output structure. Its output is toggle controlled by
a negative transition on
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
pin can directly drive the melody generator to produce hold-line
background melody. Refer to the functional description for the hold-line
function.
Key-tone output pin. It outputs 1.2kHz tone carrier when any key is
pressed in the pulse mode or when the function keys are pressed in the
tone mode.
PO
: Pulse mode, 10pps.
DD
: Tone mode.
SS
SC9302 Series
and HFO/HDO
HKS
is high (on-hook) and
HKS
outputs high to make line when
. When HDO is toggled to high, PO keeps
HDI
HKS
input. The HDO
HDI
(to be continued)
is low (off-
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Semiconductors
(continued)
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
HFI I
HFO O CMOS OUT
LOCK I/O CMOS IN/OUT
DOUT O NMOS OUT
CLOCK O NMOS OUT
VDD I -- Positive power supply, 2.0V~5.5V for normal operation.
VSS I -- Negative power supply.
CMOS IN
Pull-Low
the hand-free function. The pull-low resistance of HFI is 200KΩ
typically.
An external RC network is recommended to use for the 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
The hand-free function can be released by setting HDO high or by an
on-off-hook operation or by another HFI input. Refer to the functional
description for the hand-free functional operation.
This is a three-state input/output pin, provided to the user for controlling
the long distance call function with a lock-switch.
LOCK=OPEN: Normal dialing (no lock).
LOCK=V
LOCK=V
This is an NMOS open drain output pin. It outputs the BCD code of the
dialing digits to the LCD driver chip (SC16XX series) or µC 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 train
for the D
edge of clock.
: “0,9” is inhibited for use as the first key input.
DD
: “0” is inhibited for use as the first key input.
SS
data synchronization. The D
OUT
FUNCTION DESCRIPTIONS
1. KEYBOARD MATRIX
The 1C~4C and 1R~4Rmake up of a keyboard matrix. Together with a standard 4x4 keyboard, the
keyboard matrix is used for dialing entrance. In addition, the keyboard matrix provides resistor option for different
dialing specification selections. The keyboard arrangement for each of the SC9302 series are listed in KEYBOARD
INFORMATION.
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SC9302 Series
outputs high to connect the line.
PO
data is valid at the falling
OUT
Rev: 2.0 2001-11-01
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Semiconductors
2.TONE FREQUENCY
Tone
Name
1R
2R
3R
4R
1C
2C
3C
Output Frequency (Hz)
Specified Actual
697 699 +0.29%
770 766 -0.52%
852 847 -0.59%
941 948 +0.74%
1209 1215 +0.50%
1336 1332 -0. 30%
1477 1472 -0. 34%
% Error does not contain the crystal frequency drift.
3. DIALING SPECIFICATION SELECTION
By means of adding resistors across keyboard matrix
pins, various dialing specifications can be selected. The
allowable option resistor connections are shown right.
All the resistors are 330kΩ. The resistor option functions and the default specifications (without option resistors)
are listed below.
Option
Option Function Default (No Resistor)
Resistor
R
Make/Break Ratio Selection 40:60
K12
R
K13
R
K14
R
K21
R
K31
R
K41
Flash Function And Flash Time
Selection
Pause & PT Duration Selection TP = 3.6s , T
Pulse Number Selection Or IDD
Lock Selection
4. M/B RATIO SELECTION TABLE
R
K13
M/B Ratio(%)
No 40:60
Yes 33.3:66.6
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SC9302 Series
%Error
C4C3C2C1
R1
R
R
K12
R
K13
R
K14
PT
K21RK31RK41
= 3.6s
Rev: 2.0 2001-11-01
R2
R3
R4
Flash = control function
Flash time = 600ms
N or Keyboard operated
lock
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