Datasheet SC91415BP, SC91415CK, SC91415DK, SC91415AP Datasheet (SILAN)

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SC91415 SERIES

TONE/PULSE SWITCHABLE DIALER
WITH LCD INTERFACE AND
DUAL-TONE MELODY

DESCRIPTION

The SC91415 is a series of tone/pulse switchable dialers that is
composed of T/P dialer and T/P dialer with 13 set memories. The
SC91415 series provide necessary functions of telephone set for
application in any environment, such as Pulse dialing, Tone (DTMF)
dialing, Handfree dialing, keying tone and lock functions. The lock
function is designed to inhibit toll dialing operation. Beside this,
melody generator, ring detector and SDO (Serial Data Output)
functions are provided in advance version. Melody generator will
output dual-tone music in line hold duration. Ring detector can
prevent illegal dialing from pocket dialer. The SDO is designed to
drive LCD driver and voice synthesizer.

FEATURES

*Tone/Pulse switchable

*Wide operating voltage from 2.0 V to 5.5 V
*Low operating current, 0.15mA (Pulse) and 0.3mA (Tone) typically

*Adding resistor on keyboard scan pin that can select many tele-

phone specifications, such as: Pulse rate, M/B ratio, Flash time,
lock dialing functions.

*Lock function provides conventionality key lock and password lock

operations

*Ring detector is designed to prevent illegal dialing from pocket

dialer

*13 set one touch or (3 set one touch and 10 set two touch)

repertory memory, each one can hold data up to 16 digits
*A 32-digit LNB (last number) redial memory
*Handfree function provides on-hook dialing and speakerphone

application
*Pause and P-T time are fixed to 3.6 seconds
*Tone duration and inter-tone pause time are fixed to 98 ms
*Using 3.579545 MHz crystal or ceramic resonator

DIP-18

DIP-22

*SDO function supports LCD driver and

voice synthesizer to indicate dialing
numbers.

*Line hold function is designed for stopping

conversation temporality

*Melody generator provides music on hold

function

*Keytone function provides rapidly keying

recognition

ORDERING INFORMATION

SC91415AP DIP-18 Package
SC91415BP
SC91415CK
SC91415DK

DIP-20 Package
DIP-22 Package
DIP-24 Package

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PIN CONFIGURATIONS

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SC91415 SERIES

COL5

COL4/KT

COL3
COL2
COL1

XIN

XOUT

XMUTE

V

1

COL5

1
2
3
4
5
6
7
8
9

SS

18

HDO

17

PO

16

ROW4

15

ROW3
ROW2

14

SC91415AP

ROW1

13
12

HKS

11

VDD

10

DTMF

COL4/KT

COL3
COL2
COL1

XIN

XOUT

XMUTE

V

HFI

2
3
4
5
6
7
8
9

SS

20

HDO

19

PO

18

ROW4

17

ROW3

16

ROW2

15

ROW1

SC91415BP

14

HKS
V

13

DD

DTMF

12
1110

HFO

ROW6

COL5

OL4/KT

COL3
COL2

COL1

XIN

XOUT

XMUTE

V

HFI

DRING

1
2
3
4
5
6
7
8
9

SS

10
11

ROW5/

24

SDO

23

HDO

22

PO

21

ROW4

20

ROW3

19

ROW2

18

ROW1

SC91415DK

17

HKS
VDD

16

DTMF

15

HFO

14
1312

RMUTE

COL4/KT

ROW6

COL5

COL3
COL2

COL1

XIN

XOUT

XMUTE

V

HFI

1
2
3
4
5
6
7
8
9

10

SS

ROW5/

22

SDO

21

HDO

20

PO

19

ROW4

18

ROW3
ROW2

17
16

ROW1

SC91415CK

15

HKS
VDD

14

DTMF

13

HFO

1211

VERSIONS LIST AND FUNCTION OUTLINE

Version LNB KT HOLD(music) LOCK HF SDO(LCD) PDP
SC91415A   
SC91415B   

SC91415C   
SC91415D    

Note: PDP = Pocket Dialer Prevented

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BLOCK DIAGRAM

COL1
COL2
COL3

COL4
/KT

COL5

XIN

XOUT

ROW1

ROW6

Keyboard

interface
(column)

Oscillator

Keyboard

interface

(Row)

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SDO HFO HDO

Output circuit

Memory

(Melody)

Timing/Control

circuit

Input circuit

SC91415 SERIES

XMUTERMUTE

Row/Column

programming

counter

latch

&

decoder

Pulse

generator

D/A

converter

DTMF

PO

VDD

HFS

HKS

DRING

VDD

KEYBOARD ASSIGNMENT

COL1 COL2 COL3 COL4/KT COL5
ROW1 1 2 3 HD EM1
ROW2 4 5 6 F EM2
ROW3 7 8 9 A EM3
ROW4 */T 0 # RD/P ST

ROW5/SDO M1 M2 M3 M4 M5

ROW6 M6 M7 M8 M9 M10

Note: ROW5/SDO: Option by COL5, When ROW5 is selected by R option (COL5), there are 13 sets

one touch memory version in SC91415C/D provided.

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DIALING SIGNAL OPTION

The SC91415 series incorporated a special keyboard scanning function that is connecting a resistor (typically is 560
kΩ) on keyboard scan pin to select many telephone specifications. The specifications are described as following :

a. Mode b. M/B ratio

ROW1 Mode ROW2 MBR (%)
R-VDD 20PPS NR 40:60

NR Tone R-Vss 33:66

R-Vss 10PPS

c. Flash Time d. Lock control method

ROW3 ROW4 Tf (ms) COL1 Control method

NR NR 600 R-VDD Key lock

NR R-Vss 100 NR None lock
R-Vss NR 80 R-Vss Password lock
R-Vss R-Vss 300

e. Lock number f. ROW5/SDO pin functions

COL2 COL3 Lock number COL5 ROW5 or SDO Pin

NR NR None NR SDO

NR R-Vss 0 R-Vss ROW5
R-Vss NR 9
R-Vss R-Vss 0.9

SC91415 SERIES

(Note): If select SDO function, the memory type is

(1T*3+2T*10)
If select ROW function, the memory type is
(1T*3+2T*10) and (1T*13)

ABSOLUTE MAXIMUM RATINGS

(Tamb=25°C, All voltage referenced to VSS, unless otherwise specified)

Characteristic Symbol Value Unit

Power Supply Voltage V
Input Voltage V
PowerDissipation P
Operating Temperature Topr 0~+50 °C
Storage Temperature Tstg -55~+125 °C

DD

IN

D

6.0 V

VSS-0.3~VDD+0.3 V

500 mW

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ELECTRICAL CHARACTERISTICS

(Tamb=25°C, VDD=2.5V,fosc=3.579545MHz, All voltage referenced to V

Parameter Symbol Test Conditions Min Typ Max Unit

Operating Voltage V

Operating Current (

Standby Current Istby

Memory Retention Current Imrt ON-HOOKVDD=1.0V -- 0.001 0.1 µA

,

HKS

Input Voltage
HFO & HDO Pins Source Current Ioh Vo=2.0V 0.2 -- -- mA

PO

Pins Leakage Current

PO

SDO Pins Sink Current

DRING

HFI

Output Current(except COL4/KT)

Keyboard debounce time Tdb -- -- 20 -- ms

Key Tone Signal

Pause Time Tp -- -- 3.6 -- Sec.
Pulse to Tone Waiting Time Tpt -- -- 3.6 -- Sec.

Flash Time Tf

& DRING pins:

HFI

,

XMUTE,RMUTE

,HFO,

XMUTE,RMUTE

pin input resistance

Pin Input Resistance Rhfi Vhfi = V

Sink Current

=0) I

HKS

&SDO

&

Frequency fkt -- -- 600 -- Hz
Duration Tkt -- -- 30 -- ms

Tone 2.0 -- 5.5

DD

Pulse
Pulse -- 0.15 0.3
Tone

DD

Pulse -- 0.15 0.3
Tone
ON-HOOK
OFF-HOOK
ON-HOOK
OFF-HOOK

Vil -- V

Vih -- 0.8V

Ioh Vo= V

Iol Vo=0.5V -0.2 -- -- mA

Rdring Vdring = V

Ioh Vksn=V

Iol Vksn=V

Ioh Vo=2.0V 0.2 -- --COL4/KT Source Current

Iol Vo=0.5V 0.2 -- --

DD

SS

SS
SS

DD

Row3B, Row4B=NR,NR -- 600 -­Row3B, Row4B=NR,R-Vss 100
Row3B, Row4B=R-Vss,NR 80
Row3B, Row4B=R-Vss,R-Vss -- 300 --

SC91415 SERIES

unless otherwise specified)

SS,

unload

Unload

with pull up/down
resistor *8

Unload

with pull up/down
resistor *8

2.0 -- 5.5

-- 0.3 0.5

-- 0.3 0.5

-- 0.1 1.0 µA

SS

DD

-- -- ±0.001 µA

-- 100 -- kΩ

-- 200 -- kΩ
21050Keyboard Scanning Pins
21050µA

0.2V
V

(to be continued)

DD

DD

V

mA

V

mA

ms

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(continued)

Parameter Symbol Test Conditions Min Typ Max Unit

Pulse Rate PSR

Make/Break Ratio MBR

Inter-digit Pause Time Tidp

DTMF pin: Sink Current IoL Vdtmf=0.5V -0.2 -- -- mA
DTMF signal DC level Vdc VDD=2.0V~5.5V 0.5 -- 0.75 V

AC Level Vdtmf Row group 142 160 180 mV

DTMF signal

Minimum tone duration Time Tp -- 96 98 100 ms
Minimum Intertone Pause Time t

Melody
Output
Signal

HD key release hold function
debounce time
SDO every bit time Tbit -- 3.8 3.9 4.1 ms
Off-Hook delay time Tdly -- -- 300 -- ms

Pre-emphase Twist Column – Row 1 2 3 dB
Distortion THD RL=5kΩ -- -30 -23 dB
Load Resistance ZL THD<-23db 5 -- -- kΩ

Main ToneAC Level Vmtac VDD=2.0V~5.5V

Sub-tone Vstac V

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Row1=R-V
Row1=R-V
Row2=NR -- 40:60 -­Row2=R-V
PSR=10pps -- 800 -­PSR=20pps -- 500 --

Memory dialing 96 98 100 ms

ITP

DD

Thdrdb -- -- 280 -- ms

DD
SS

SS

=2.0V~5.5V

SC91415 SERIES

-- 20 --

-- 10 --

-- 33:66 --

-- -23.3 --

48 53 58

-- -25.3 --

37 42 47

pps

%

ms

(dBm)

mV

(dBm)

mV

DTMF FREQUENCY OUTPUT

Keyboard Scanning Pin CCITT Standard(Hz) Actual Output Deviation(%)

ROW1 (f1) 697 699.1 +0.30
ROW2 (f2) 770 766.2 -0.49
ROW3 (f3) 852 847.4 -0.53
ROW4 (f4) 941 947.9 +0.73

COL1 (f5) 1209 1215.8 +0.56
COL2 (f6) 1336 1331.6 -0.32
COL3 (f7) 1477 1471.8 -0.35

(fosc=3.579545MHz)

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PIN DESCRIPTION

Pin No.

AP BP CK DK

13 15 16 18 ROW1
14 16 17 19 ROW2
15 17 18 20 ROW3
16 18 19 21 ROW4

-- -- 22 24 ROW5

-- -- 1 1 ROW6
5566COL1
4455COL2
3344COL3
1122COL5

2233COL4/KT

6677 XIN
7788XOUT

8899

11 13 14 16 VDD

9 9 10 10 VSS

-- 10 11 11

-- 11 12 14 HFO

10 12 13 15 DTMF

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Pin Name Description

XMUTE

HFI

SC91415 SERIES

Keyboard scan pins of row group. In idle state (
HFO is “Low”), these pins stay “High impedance” level to prevent
power consumption. Otherwise, these pins switch to “High” level for
detecting keyboard entry. These pins will output 600Hz signal while
keyboard is scanning.

Keyboard scan pins of column group. In idle state, these pins stay
“High impedance” level. Otherwise these pins switch to “Low” level for
detecting keyboard entry. These pins will output 600Hz signal while
keyboard is scanning.

The fourth column group pin of the keyboard that also provides the
keytone output. Normally, this pin stays “Low” level for detecting
keyboard entry. After a valid keyboard entry, this pin will output keying
confirmation tone that is 600 Hz signal and 30 ms duration. To
prevent signal interference, while DTMF issue, it will disable key tone
output except function key.
Oscillator input and output pins. A 3.579545MHz crystal or ceramic
resonator must be crossed connection to XIN and XOUT pins which
generate system clock.

The Tone/Pulse MUTE signal output pin that is NMOS open-drain
output structure. This pin will switch to “Low” level during Tone/Pulse
dialing and hold function. Otherwise, this pin stays “High impedance”
level.
Positive and negative power supply input pins. Recommended
operating voltage from 2.0Vdc to 5.5Vdc.

Handfree inputs pin which accepts falling edge signal to turn “on” or
turn “off” handfree function. This pin is hysteresis input structure and
built-in pull up resistor (typically 200kΩ).
Handfree outputs pin that is designed to control telephone line for
on-hook dialing or control speakerphone circuit for handfree
conversation. When handfree function is executed, this pin will switch
to“High”. Otherwise, this pin stays “Low” level.

The DTMF (Dual Tone Multi-Frequency) and music signals output pin.
Normally, this pin stays “Low” level. In Tone dialing mode, this pin will
output DTMF signal that is corresponding to keyboard 0 . 9, * and #
keys. Beside this, in the line hold duration, this pin will issue dual-tone
music for telephone line.

is “High” and

HKS

(to be continued)

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(continued)

Pin No.

AP BP CK DK

12 14 15 17

17 19 20 22

18 20 21 23 HDO

-- -- 22 24 SDO

-- -- -- 12

-- -- -- 13

Pin Name Description

HKS

PO

DRING

RMUTE

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Control signal inputs pin that is corresponding hook switch status.
When handset was left from cradle, this pin must be connected to
“Low” level to operate all functions. Otherwise, this pin must be
connected to “High” level to disable all function and prevent power
consumption.
Pulse signal outputs pin that is NMOS open-drain output structure.
Normally, this pin stays “High impedance” level. In Pulse dialing mode
and keypad was entry. This pin will output pulse trains signal that is
corresponding to keyboard 0 .. 9 keys.
Hold function output that is CMOS structure. Normally, this pin stays
“Low” level. When Hold function is executing, this pin will output
“High” level. This pin is designed to drive LED or peripheral circuit to
indicate line is at Hold status.
SDO function output that is NMOS open-drain structure. When there
is a valid entry on keyboard, this pin will output a serial data. This
serial data is designed to drive LCD driver to display dialing number
on LCD screen or drive voice synthesizer to announce dialing number
to speaker.
The ring signal detect input pin which is internal pull up (built-in 100
kΩ resistor). While the Tel-ring is incoming, this pin must be
connected to “Low” with delay to indicate the ringing . Otherwise, this
pin must be connected to “High” level .
Ring mute output pin that is NMOS open-drain structure. The

RMUTE

prevent the illegal dialing from pocket dialer. If the
“High” level , then Off-Hook or turn on Handfree, this pin will output
“Low” level. In other words, the

phone that receives an incoming call (
an outgoing call (
outgoing call ,then
dialing from pocket dialer in the particular application. The

canberestoredto“High”levelwhenthefirstkeyentryisnotthe
optioned lock-number .

pin is designed to control microphone of handset to

SC91415 SERIES

DRING

DRING

= High input) . If the phone user make an

DRING

RMUTE

pin activated to prevent the illegal

pin is used to check the

DRING

=Low input) or make

pin is at

RMUTE

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FUNCTION DESCRIPTIONS

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ANormal Dialing

Directly keying digital key on keyboard which number can be dialing output and stored in LNB memory automatically.
Operating procedure described as follow :
* Toselect Pulse or Tonemode.
* Off-hook or turn on HF function.
* Keying d1, d2, .. , dn. The “d” expressed digital keypad that included 1~9, *, 0, #, P, and P→T keys. The “n”
expressed unlimited.
* The numbers d1, d2, .. , dn will be dialed out in Pulse or Tone mode as selection.

BLNB redial memory

Storing:
In normal dialing mode, every digital key was entry which number will be stored in LNB memory automatically. If
entry digits are more than 32 digits, the redial function of LNB memory will be disabled. Otherwise, these numbers
stored in LNB memory can be redial output.
Redialing:
After normal dialing, directly keying F key (or On-Off hook once) and keying RD key on keyboard. The numbers that
are stored into LNB memory will be dialed output.

SC91415 SERIES

CRepertory memory

The SC91415 series incorporated several sets repertory memory and each one can store number up to 16 digits. In
memory storing, if stored numbers are more than 16 digits that only the previous 16 digits can be stored into specific
memory. Otherwise, these numbers can be stored entirely. After memory dialed out, the content of LNB is keeping to
current data.

Storing of 13 sets memory types

Direct (one-touch) operation
Off-hook (or turn on HF function), push (ST, d1, d2, .. , dn [ST], EMn or M1~M10 (ROW5 optioned). The numbers d1,
d2, .. , dn will be stored into memory location “EMn” or Mn. The “EMn” expressed emergency memory EM1 to EM3.
The Mn expressed memory M1~M10.

Indirect (two-touch) memory operation
Off-hook (or turn on HF function), push (ST, d1, d2, .. , dn, ST, n.) The numbers d1, d2, .. , dn will be stored into
memory location “n”. The “n” expressed digital key from 0 to 9.

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Dialing (after memory dialed out, the content of LNB is keeping to current data)

Direct (one-touch) memory operation
* Toselect Pulse or Tonemode.
* Off-hook (or Turn on HF function), push Mn (or EMn) key. The numbers that are stored in direct memory location
“Mn (or EMn)” will be dialed out in Pulse or Tone mode as selection. The “n” expressed digital number from 1~10
decided by dialers’ memory sets.

Indirect (two-touch) memory operation
* Toselect Pulse or Tonemode.
* Off-hook (or Turn on HF function), push A, n key. The numbers that are stored in indirect memory location “n” will
be dialed out in Pulse or Tone mode as selection. The “n” expressed digital key from 0 to 9.

Pause (P) Key operation

The Pause (P) key is designed to support pause operation in dialing duration. “P” key can be stored in memory and it
will occupy one digital position.
* Toselect Pulse or Tonemode.
* Off-hook (or turn on HF function), push (d1, d2, .. , dn, RD/P, k1, k2, .. , kn.) These numbers will be dialed out as
following sequence:

d1, d2, .. , dn, Tp, k1, k2, .. , kn



SC91415 SERIES

Pulse to Tone (*/T) key operation

The Pulse to Tone (*/T) key is designed to support toll dialing (long distance call) or PABX system operation. The
“*/T” key can be stored in memory and it will occupy one digital position.
* Toselect Pulse mode.
* Off-hook (or turn on HF function), push d1, d2, .. , dn, */T, k1, k2, .. , kn. These numbers will be dialed out as
following sequence:

d1, d2, .. , dn, Tpt, k1, k2, .. , kn.
(pulse mode) (tone mode)

Flash (F) key operation

The Flash (F) key is designed to break telephone line temporarily. After F key is depressed, this dialer will send a
flash signal to break line 600 ms, 300 ms, 100 ms or 80 ms as ROW3 and ROW4 selection.

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D) Handfree (HF) function

The handfree function is designed to support on-hook dialing and loudspeaker application which can be turn “on” or
“off” with falling edge signal from

HFI pin. During handfree function is executed, the HFO pin is switched to “high”.

Otherwise the HFO pin stays “low” level. One of the following operations can turn off Handfree function (HFO pin
return to “Low”).
* On-off hook once.

* Trigger

HFI pin with falling edge signal.

* Turn on Hold (HD) function. (HDO pin switched to “High”)

E) Hold (HD) function

The Hold function is designed to stop conversation temporarily. In off-hook state (or HF function is turned on), to
press HD key on the keyboard, the Hold function can be turned “on” (HDO pin switched to “High”). One of the
following operations can turn off Hold function (HDO pin switched to “Low”).
* On-off hook once.
* To press HD key over 280 ms.
* Turn on Handfree (HF) function. (HFO pin switched to “High”)

Special Note

A 300 ms delay time (Tdly) at the first Off-Hook or turn on Handfree that is a special designed to avoid a rapid key
entry (dummy number ) in this time duration ,and a long distance call number follows. For example,

Off-Hook , “3” ,.................... , “0” ,1,2,3......

Dummy key Lock number key
The dummy number “3” is not detected by the centered office or PABX ,but the following numbers “0” ,1,2,3... long
distance call can be dialed out normally since the leading number “3” is not the Lock-number defined in SC91415
series. To prevent the unavoidable long distance call, then SC91415 inhibits the key entry during Tdly.

SC91415 SERIES

F) Operating

flow chart

Handfree State

HD

4

On-hook

HFHD

6

On-hook

Holdline State

HF

HF

HKS=Hi

1

On-hook State

HKS=Lo

3

Off-hook

Handfree State

HD

HKS=Hi

HKS=Lo

HKS=Hi

HF
HF

HF

HKS=Lo

Off-hook State

Holdline State

2

HD

5

Off-hook

HD

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Note :
HF= Handfree,
HD = Hold

Rev: 2.0 2001-11-13

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Truth table

Operating State

(0) on-hook, idle state
(1) Off-hook line
(2) Off-hook, HF line
(3) On-hook, HF line
(4) Off-hook, HD line
(5) On-hook, HD line

Note : F = floating (high impedance); H = logic “High”; L = logic “Low” level.



HKS PO XMUTE

HFFLL

LFFLL
LFFHL

HFFHL

LFLLH

HFLLH

G) Music on Hold

SC91415 series built-in a melody generator to generate dual-tone music on DTMF output pin. The music is designed
for telephone line at line holding.

H) SDO (Serial Data Output) function

The SDO is serial data output which format is same as UART protocol. SDO function is designed to drive LCD driver
and voice synthesizer. So the dialing numbers can be display on LCD screen with SC32100 (or SC32116). The SDO
signal consists of two start bits, six data bits and two stop bits. Each bit time is about 3.9 ms (256 Hz) and output
sequences are following by start bits, data bits (LSB to MSB) and stop bits.

SC91415 SERIES

Input / Output pin level

HFO HDO

start bitsready data bits stop bits

01bit5bit4bit3bit0 bit1 bit210

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SDO Keypad Encoded table

* Digital key (b5,b4=0,0)

Keypad

100011
200102
300113
401004
501015
601106
701117
810008
910019
010100

“*”/T 1 0 1 1

#1100

P1101P

*/”T” 1 1 1 0

* Function key (b5,b4=1,0)

Keypad

F 1 1 1 1 Clear all display

b3 b2 b1 b0

b3 b2 b1 b0



Output

Output

SC91415 SERIES

Display

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

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Display

* Keypad ,SDO format and LCD display reference table:

Keypad Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Display

1 000001 1
2 000010 2
3 000011 3
4 000100 4
5 000101 5
6 000110 6
7 000111 7
8 001000 8
9 001001 9
0 001010 0

“*”/T001011

# 001100
P 001101 P

*/”T”001110

F 1 0 1 1 1 1 Clear all display

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I) LOCK function

The SC91415 series provide the LOCK function to inhibit toll dialing operation. Connecting a resistor on COL1 pin to
VSS can select different LOCK control method that is conventional key lock or password lock. Also the lock number
that can be selected by connecting the resistors on COL2 or COL3 pin. After power on reset, the password is fixed to
000 automatically. The lock function is disabled when the password is equal to 000.

How to setup password

* Set LOCK function to password control mode. (Connects a resistor on COL1 pin to VSS)
* Off hook (or turn on HF function)
* Push: #,#,ops1, ops2, ops3, nps1, nps2, nps3, # . If the ops1~ops3 are the same with current password, then
nps1~np3 will be stored in the dialer to replace current password. Otherwise, the current password can not be
updated. All the numbers pressed in the password setup procedure can not be dialed out when current password is
not equal to 000. If the current password are equal to 000, then only the first number “#” will be dialed out.

Normal dialing

Set lock function to none lock mode (without resistor connected to COL1 pin) or set password equal to 000. In this
case, the dialer is operated in normal mode and all functions work at unlimitation.

Dialing via LOCK function

Conventional key lock mode. (Connects a resistor on COL1 pin to VDD)
* Off hook (or turn on HF function)
* Keying: d1, d2, .. , dn . If the first number (d1) is the same with the lock number that optioned in table, then all entry
numbers can not be dialed out and keyboard will be inhibited until on to off hook once again. If the first number is not
equal to lock number, all the entry numbers will be dialed out.

SC91415 SERIES

Password control mode. (Connects a resistor on COL1 pin to VSS)
* Off hook (or turn on HF function)
* Keying: ( [#, ps1, ps2, ps3] + telephone number.) The numbers in the [ ] symbol could be omitted. The number “#”
will be inhibited when the current password is not equal to 000,and ps1, ps2, ps3 work at the checking state, not to
be dialed out. Other descriptions are as on following:

Incorrect password entry. The telephone numbers can not be dialed out.
Password is omitted. If the first digit of telephone numbers is the same with the lock number, all of the telephone

numbers can not be dialed out and keyboard will be inhibited until On to Off hook once again. If the first digit is not
equal to the lock number then the telephone numbers will be dialed out entirely.
Correct password entry. The telephone numbers can be dial out no matter what lock number is.

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J) Ring detector

The Ring detector is designed to prevent illegal dialing from pocket dialer. Following the procedures ( i,ii,iii ), this
dialer will detect

DRING pintocontrolRMUTE output level. If DRING is detected a “Low” level, the

RMUTE stays “High impedance”. If DRING is detected a “High” level, the RMUTE will output “Low” until

keyboard entry. In actual application of the
handset to prevent that the dialing signal (DTMF) is coupling by the Microphone of the phone handset. (such as

pocket dialer)
i. In idle state,

ii. In idle state, turn on handfree function.
iii. The flash operation ( F key ).

HKS is from “High” to “Low” (pick up handset action).

RMUTE pin is recommended connection to microphone of the phone

TIMING DIAGRAMS

HKS

KEY IN

KT

XMUTE

HDO
SDO

PO

DTMF

OSC.

Tdb

23

Tkt

Tm

Tidp

Tdly

TbTm TbTm

Pulse mode operating timing

SC91415 SERIES

Tidp

Hi-impedance

HKS

KEY IN

XMUTE

HDO
SDO

PO

DTMF

OSC.

KT

2

Tdb

Titp

3

TitpTd

Hi-impedance

DTMF mode operating timing

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TIMING DIAGRAMS

LNB=2,3

HKS

KEY IN

KT

XMUTE

HDO
SDO

PO

DTMF

OSC.

LNB=2,3

HKS

KEY IN

KT

XMUTE

HDO
SDO

(continued)

Tdb

Tdly

Tdb

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RD/P

Tkt

Tm

Tidp

Pulse mode LNB redial timing

RD/P

Tb Tm Tb Tm

Tkt

SC91415 SERIES

Tidp

Hi-impedance

PO

DTMF

OSC.

Td Td

Titp Titp

Tdly

DTMF mode LNB redial timing

Hi-impedance

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TIMING DIAGRAMS (continued)

HKS

KEY IN

KT

XMUTE

HDO
SDO

2 RD/P 3

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SC91415 SERIES

Tp

PO

DTMF

OSC.

TidpTidp

Hi-impedance

Pause key operating timing

HKS

KEY IN

XMUTE

HDO

SDO

PO

DTMF

OSC.

2*/T

KT

3

Tpt

Hi-impedance

Pulse to Tone (P→T) operating timing

HKS

KEY IN

Tdb

KT

XMUTE

HDO

SDO

PO

DTMF

OSC.

2

Tf Tfp=300ms

Hi-impedance

Flash key operating timing

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TIMING DIAGRAMS

HKS

KEY IN

KT

SDO

Note: L=LSB, M=MSB, sT=STARTbit time, spT=STOP bit time

HKS

KEY IN

HFO

HDO

XMUTE

SDO

MELODY

(continued)

HF HD HF HD HD HD HF HD HD@

PO

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Tdb

SC91415 SERIES

2

sT sT b0 b1 b2 b3 b4 b5 spt spt

Tbit

0101000001

LM

SDO operating timing

Hi-impedance

Thdrdb

280ms

@ :It can be triggled by extension telephone set for hold functionrelease

HF and HD operating timing

HFI

HKS

KEY

KT

OSC.

HF

50

Tdly

Off-Hook delay time

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"0" digit dialing time

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Hi-impedance

Hi-impedance

Rev: 2.0 2001-11-13

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Semiconductors

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TIMING DIAGRAMS

RING

DRING

HKS

RMUTE

RING

DRING

HKS

RMUTE

(continued)

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Toff

Ton

Timing of receiving an incoming call

Timing of making an outgoing call

SC91415 SERIES

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Rev: 2.0 2001-11-13

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TYPACAL APPLICATION CIRCUIT

560kΩ

560kΩ 560kΩ 560kΩ

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PC817

EM2456F

EM3789A

M10M6 M7 M8 M9

M5M1 M2 M3 M4

ST*/T 0 # RD/P

(for SC91415)

4.7kΩ

1.0µF

1.2MΩ

DRING

VDD

JUMPER

JUMPER

EM1123HD

560kΩ

560kΩ

SC91415 SERIES

BRIDGE

22µF/50V

27V

A42

VDD

100kΩ

1N4148

1N4148 47kΩ

560kΩ

560kΩ

560kΩ

47kΩ

Ring

1N4148

Tip

1A Bridge

220kΩ

0.1µF

C945

SW1A

A92

OFFHOOK

ONHOOK

10MΩ

100kΩ

2.7kΩ1N4148

220kΩ

1N4148

470kΩ

0.1µF 220µF

0.1µF
470Ω

2.2kΩ

47kΩ

100kΩ

SDO/ROW5

ROW4

SC91415DK

ROW3

ROW2

ROW1

DTMF

DRIVER

HDO

HKS

HFO

24

23 22 21 20 19 18 17 16 15 14 13

PO

V

DD

560kΩ

LCD

JUMPER

CE

1.5V

COL4/KT

5.1V

1.5kΩ

0.01µF50Ω

1815

1815

220kΩ

47µF

HDO

HFO

HDO

47kΩ 1.0µF

22kΩ

C945

JUMPER

10kΩ

1N4148X3

0.1µF

C945

C945

ROW1

JUMPER

47kΩ

CE

SW1B

470kΩ

HOOK

HANDSET

HANDFREE

BUZZER

10pF

10pF

1 2 3 4 5 6 7 8 9 10 11 12

ROW6

COL5

COL4/KT

COL3

DRING

2TO4LINE

AUDIO

COL2

COL1

XIN

XOUT

XMUTE

V

SS

HFI

DRING RMUTE

3.58MHz

HF

NETWORK

SPEECH

AMPLIFER

POWER

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CHIP TOPOGRAPHY

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SC91415 SERIES

Size: 2.16 x 2.33 mm

2

PAD COORDINATES

No. Symbol X Y No. Symbol X Y

1
2
3
4
5
6
7
8

9
10
11

Note: The original point of the coordinate is the die center.

P1 -1002.4 -256.3
P2 -1002.4 -450.7
P3 -1002.4 -649.1
P4 -1002.4 -878.2
P5 -839.9 -925.4
P6 -563.3 -925.4
P7 321.0 -925.4
P8 721.4 -926.5

P9 1006.5 -794.9
P10 1006.5 -639.7
P11 1006.5 -343.1

(Unit: µm)

12
13 P13
14 P14
15 P15
16 P16 556.0
17 P17
18 P18
19 P19
20 P20
21 P21
22 P22

P12 1006.5 350.1

1006.5 608.3

1007.2 846.3

849.2 923.4

379.6

108.0 923.4

-1002.4 719.1

-1002.4 501.8

-1001.4 200.2

-1002.4 5.1

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0 2001-11-13

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923.4

923.4

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PACKAGE OUTLINE

DIP-18-300-2.54 UNIT: mm

2.54

SC91415 SERIES

0.25

6.40

3.51

DIP-20-300-2.54

6.40

22.95

22.95

0.46

2.54

1.50

1.50

7.62

15 degree

5.083.30

UNIT: mm

0.25

7.62

15 degree

3.51

0.46

5.083.30

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Rev: 2.0 2001-11-13

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PACKAGE OUTLINE

DIP-22-400-2.54 UNIT: mm

2.54

SC91415 SERIES

0.25

9.343.51

1.50

27.88

0.46

10.16

15 degree

5.083.30

SDIP-24-300-2.54 UNIT: mm

2.54

6.40

1.50

34.50

7.62

15 degree

0.25

3.51

0.46

5.083.30

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0 2001-11-13

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