Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

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-22

DIP-18

*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

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

PIN CONFIGURATIONS

91415A

COL4/KT

COL3

COL2

COL5

VDD

XIN

XOUT

ROW1

ROW4

ROW3

HDO

HKS

XMUTE

91415B

DTMF

XOUT

XMUTE

HKS

ROW2

ROW1

COL5

DTMF

ROW3

COL1

ROW2

HFO

HDO

ROW4

COL3

COL2

COL1

COL4/KT

XIN

HFI

91415D

91415C

XIN

XOUT

XMUTE

HKS

ROW1

VDD

ROW6

HFO

ROW2

ROW5/
SDO

HFI

ROW4

ROW3

HDO

COL4/KT

COL3

COL2

COL5

COL1

DTMF

XIN

XOUT

XMUTE

ROW6

HFI

COL4/KT

COL3

COL2

COL5

COL1

DRING

HKS

ROW1

VDD

HFO

ROW2

ROW5/
SDO

ROW4

ROW3

HDO

DTMF

RMUTE

VERSIONS LIST AND FUNCTION OUTLINE

Version

LNB

HOLD(music)

LOCK

SDO(LCD)

PDP

SC91415A

SC91415B

SC91415C

SC91415D

Note: PDP = Pocket Dialer Prevented

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

BLOCK DIAGRAM

Output circuit

Row/Column

programming

counter

Memory

(Melody)

latch

decoder

D/A

converter

Timing/Control

circuit

Keyboard

interface

(column)

Oscillator

Keyboard

interface

(Row)

Input circuit

Pulse

generator

COL1

COL2

COL3

COL4

/KT

COL5

XIN

XOUT

ROW1

ROW6

SDO HFO HDO

DTMF

VDD

HKS

HFS

DRING

XMUTE

RMUTE

VDD

KEYBOARD ASSIGNMENT

COL1

COL2

COL3

COL4/KT

COL5

ROW1

EM1

ROW2

EM2

ROW3

EM3

ROW4

*/T

RD/P

ROW5/SDO

ROW6

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.

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

DIALING SIGNAL OPTION

The SC91415 series incorporated a special keyboard scanning function that is connecting a resistor (typically is 560

) 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-V

20PPS

40:60

Tone

R-Vss

33:66

R-Vss

10PPS

c. Flash Time

d. Lock control method

ROW3

ROW4

Tf (ms)

COL1

Control method

600

R-VDD

Key lock

R-Vss

100

None lock

R-Vss

Password lock

R-Vss

300

e. Lock number

f. ROW5/SDO pin functions

COL2

COL3

Lock number

COL5

ROW5 or SDO Pin

None

SDO

R-Vss

ROW5

R-Vss

0.9

(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 V

, unless otherwise specified)

Characteristic

Symbol

Value

Unit

Power Supply Voltage

6.0

Input Voltage

-0.3~V

+0.3

Power Dissipation

500

Operating Temperature

Topr

0~+50

�

Storage Temperature

Tstg

-55~+125

�

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

ELECTRICAL CHARACTERISTICS

(Tamb=25

�

C, V

=2.5V, fosc=3.579545MHz, All voltage referenced to V

SS,

unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Tone

2.0

5.5

Operating Voltage

Pulse

unload

2.0

5.5

Pulse

0.15

0.3

Tone

Unload

0.3

0.5

Pulse

0.15

0.3

Operating Current ( HKS =0)

Tone

with pull up/down

resistor *8

0.3

0.5

ON-HOOK

OFF-HOOK

Unload

ON-HOOK

Standby Current

Istby

OFF-HOOK

with pull up/down

resistor *8

0.1

1.0

�

Memory Retention Current

Imrt

ON-HOO K

=1.0V

0.001

0.1

�

Vil

0.2V

HKS ,

HFI & DRING pins:

Input Voltage

Vih

0.8V

HFO & HDO Pins Source Current

Ioh

Vo=2.0V

0.2

PO , XMUTE , RMUTE & SDO

Pins Leakage Current

Ioh

Vo= V

�

0.001

�

PO ,HFO, XMUTE , RMUTE

SDO Pins Sink Current

Iol

Vo=0.5V

-0.2

DRING

pin input resistance

Rdring

Vdring = V

100

HFI Pin Input Resistance

Rhfi

Vhfi = V

200

Ioh

Vksn=V

Keyboard Scanning Pins

Output Current(except COL4/KT)

Iol

Vksn=V

�

Ioh

Vo=2.0V

0.2

COL4/KT Source Current

Sink Current

Iol

Vo=0.5V

0.2

Keyboard debounce time

Tdb

Frequency

fkt

600

Key Tone Signal

Duration

Tkt

Pause Time

3.6

Sec.

Pulse to Tone Waiting Time

Tpt

3.6

Sec.

Row3B, Row4B=NR,NR

600

Row3B, Row4B=NR,R-Vss

100

Row3B, Row4B=R-Vss,NR

Flash Time

Row3B, Row4B=R-Vss,R-Vss

300

(to be continued)

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

(continued)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Unit

Row1=R-V

Pulse Rate

PSR

Row1=R-V

pps

Row2=NR

40:60

Make/Break Ratio

MBR

Row2=R-V

33:66

PSR=10pps

800

Inter-digit Pause Time

Tidp

PSR=20pps

500

DTMF pin: Sink Current

IoL

Vdtmf=0.5V

-0.2

DTMF signal DC level

Vdc

=2.0V~5.5V

0.5

0.75

AC Level

Vdtmf

Row group

142

160

180

Pre-emphase

Twist

Column � Row

Distortion

THD

RL=5k

-30

-23

DTMF signal

Load Resistance

THD<-23db

Minimum tone duration Time

100

Minimum Intertone Pause Time

ITP

Memory dialing

100

-23.3

Main Tone AC Level

Vmtac

=2.0V~5.5V

(dBm)

-25.3

Melody

Output

Signal

Sub-tone

Vstac

=2.0V~5.5V

(dBm)

HD key release hold function

debounce time

Thdrdb --

280

SDO every bit time

Tbit

3.8

3.9

4.1

Off-Hook delay time

Tdly

300

DTMF FREQUENCY OUTPUT

(fosc=3.579545MHz)

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

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

PIN DESCRIPTION

Pin No.

Pin Name

Description

ROW1

ROW2

ROW3

ROW4

ROW5

ROW6

Keyboard scan pins of row group. In idle state ( HKS is "High" and

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.

COL1

COL2

COL3

COL5

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.

COL4/KT

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.

XIN

XOUT

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.

XMUTE

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.

VDD

VSS

Positive and negative power supply input pins. Recommended

operating voltage from 2.0Vdc to 5.5Vdc.

HFI

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 200k

HFO

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.

DTMF

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.

(to be continued)

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

(continued)

Pin No.

Pin Name

Description

HKS

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.

HDO

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

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.

DRING

The ring signal detect input pin which is internal pull up (built-in 100

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 .

RMUTE

Ring mute output pin that is NMOS open-drain structure. The

RMUTE

pin is designed to control microphone of handset to

prevent the illegal dialing from pocket dialer. If the DRING pin is at

"High" level , then Off-Hook or turn on Handfree, this pin will output

"Low" level. In other words, the DRING pin is used to check the

phone that receives an incoming call ( DRING =Low input) or make

an outgoing call ( DRING = High input) . If the phone user make an

outgoing call ,then RMUTE pin activated to prevent the illegal

dialing from pocket dialer in the particular application. The RMUTE

can be restored to "High" level when the first key entry is not the

optioned lock-number .

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

FUNCTION DESCRIPTIONS

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 :

* To select Pulse or Tone mode.

* 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.

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.

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.

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

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

Direct (one-touch) memory operation

* To select Pulse or Tone mode.

* 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

* To select Pulse or Tone mode.

* 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.

* To select Pulse or Tone mode.

* 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

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.

* To select 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.

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

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.

F) Operating

flow chart

On-hook State

Off-hook State

Off-hook

Handfree State

On-hook

Handfree State

Off-hook

Holdline State

On-hook

Holdline State

HKS=Hi

HKS=Lo

HKS=Hi

HKS=Lo

HKS=Hi

HKS=Lo

Note :

HF= Handfree,

HD = Hold

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

Truth table

Input / Output pin level

Operating State

HKS

XMUTE

HFO

HDO

(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.

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.

start bits

ready

data bits

stop bits

bit5

bit4

bit3

bit0

bit1

bit2

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

SDO Keypad Encoded table

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

Output

Keypad

Display

"*"/T

*/"T"

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

Output

Keypad

Display

Clear all display

* Keypad ,SDO format and LCD display reference table:

Keypad

Bit5

Bit4

Bit3

Bit2

Bit1

Bit0

Display

"*"/T

*/"T"

Clear all display

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

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.

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.

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

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

pin to control

RMUTE

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

RMUTE

pin is recommended connection to microphone of the phone

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,

HKS

is from "High" to "Low" (pick up handset action).

ii. In idle state, turn on handfree function.

iii. The flash operation ( F key ).

TIMING DIAGRAMS

Tdly

Hi-impedance

Tdb

Tkt

TbTm Tb Tm

Tidp

KEY IN

HDO

SDO

DTMF

OSC.

HKS

XMUTE

Pulse mode operating timing

Hi-impedance

KEY IN

HDO

DTMF

OSC.

HKS

SDO

Tdb

XMUTE

Titp

DTMF mode operating timing

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

TIMING DIAGRAMS

(continued)

KEY IN

SDO

Tdb

sT sT b0 b1 b2 b3 b4 b5 spt spt

Tbit

Hi-impedance

HKS

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

SDO operating timing

KEY IN

SDO

HFO

Hi-impedance

HD@

280ms

Thdrdb

HDO

MELODY

XMUTE

HKS

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

HF and HD operating timing

KEY

Hi-impedance

Tdly

"0" digit dialing time

OSC.

HFI

HKS

Off-Hook delay time

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

TYPACAL APPLICATION CIRCUIT

(for SC91415)

OOK

r
i
dge

Ri
n

A4
2

A9
2

220k

SDO/ROW5

HDO

ROW4

ROW3

ROW2

ROW1

DTMF

HFO

ROW6

COL5

COL4/KT

COL3

COL2

COL1

XIN

XOUT

HFI

91415D

DRING

RMUTE

HKS

XMUTE

EM1

EM2

EM3

*
/
T

RD/P

M10

10pF

HDO

HFO

HDO

ROW

L4/

LCD

DRIV

O
4

I
N

SPEEC

UDIO

POWER

AMPLIF

HANDF

REE

HANDSET

10M

ONHOOK

BRI

817

PER

VDD

47k

100k

�

47k

100k

220k

�

945

470k

�

100k

1N
4148

�

220

�

1815

�

1815

�

220k

470k

PER

10k

22k

47k

�

945

560k

PER

58M

10pF

BUZZER

560k

DRI

1N
4148

VDD

�

27V

470

1N
4148

945

47k

1N
4148X

PER

945

560k

PER

1N
4148

47k

HOOK

Silan
Semiconductors

SC91415 SERIES

HANGZHOU SILAN MICROELECTRONICS JOINT-STOCK CO.,LTD

Rev: 2.0

2001-11-13

CHIP TOPOGRAPHY

Size: 2.16 x 2.33 mm

PAD COORDINATES

(Unit:

�

No.

Symbol

No.

Symbol

-1002.4

-256.3

P12

1006.5

350.1

-1002.4

-450.7

P13

1006.5

608.3

-1002.4

-649.1

P14

1007.2

846.3

-1002.4

-878.2

P15

849.2

923.4

-839.9

-925.4

P16

556.0

923.4

-563.3

-925.4

P17

379.6

923.4

321.0

-925.4

P18

108.0

923.4

721.4

-926.5

P19

-1002.4

719.1

1006.5

-794.9

P20

-1002.4

501.8

P10

1006.5

-639.7

P21

-1001.4

200.2

P11

1006.5

-343.1

P22

-1002.4

5.1

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

Электронный компонент: SC91415AP