W91810N SERIES

23-MEMORY TONE/PULSE DIALER WITH

HANDFREE, LOCK AND HOLD FUNCTIONS

Publication Release Date: March 2000

- 1 - Revision A5

GENERAL DESCRIPTION

The W91810N is a series of tone/pulse switchable telephone dialers with 23 memory, keytone, hold,
lock, mute, volume control and handfree dialing control features. These chips are fabricated using
Winbond's high-performance CMOS technology and thus offer good performance in low-voltage, low-
power operations.

FEATURES

Tone/pulse switchable dialer

Two by 32 digits redial and save memory

Three by 32 digits one-touch direct repertory memory

Twenty by 32 digits one-touch direct or two-touch indirect repertory memory

Pulse-to-tone (*/T) keypad for long distance call operation

Chain dialing

Uses 6

6 or 7

7 keyboard

Easy operation with redial, flash, pause, and */T keypads

Pause, P

T (pulse-to-tone) can be stored as a digit in memory

Dialing rate: 10 or 20 ppS by mask option

Minimum tone output duration: 93 mS

Minimum intertone pause: 93 mS

Pause time: 3.6 sec.

Flash break time (73 mS, 100 mS, 300 mS, or 600 mS) selectable by keypad; pause time is 1.0 S

Make/break ratio (2:3 or 1:2) selectable by MODE pin

Mute key for speech network mute

No key will be accepted except the "HOLD" key when in the Hold mode

4-level volume control by V1 and V2 pin - default value is zero

Key tone output for valid keypad entry recognition

On-chip power-on reset

Uses 3.579545 MHz crystal or ceramic resonator

22, 24 or 28-pin dual-in-line plastic package

The different dialers in the W91810N series are shown in the following table:

TYPE NO.

PULSE

(ppS)

MEMORY

LOCK

KEY

TONE

HANDFREE

DIALING

VOLUME

CONTROL

PACKAGE

(PINS)

W91810N

13 one touch, 10 two touch

W91810AN

13 one touch, 10 two touch

W91810LN

13 one touch, 10 two touch

W91810ALN

13 one touch, 10 two touch

W91811AN

23 one touch

W91811ALN

23 one touch

W91812N

13 one touch, 10 two touch

W91812AN

13 one touch, 10 two touch

W91813AN

23 one touch

W91810N SERIES

- 2 -

PIN CONFIGURATIONS

MODE

DTMF

HKS

T/P MUTE

LOCK

W91810LN

H/P MUTE

K MUTE

MODE

DTMF

HKS

T/P MUTE

LOCK

H/P MUTE

K MUTE

HFI

HFO

W91811ALN

W91810ALN

MODE

DTMF

HKS

T/P MUTE

LOCK

H/P MUTE

K MUTE

HFI

HFO

MODE

DTMF

HKS

T/P MUTE

W91810N/812N

H/P MUTE

K MUTE

MODE

DTMF

HKS

T/P MUTE

H/P MUTE

K MUTE

HFI

HFO

W91811AN/813AN

W91810AN/812AN

MODE

DTMF

HKS

T/P MUTE

H/P MUTE

K MUTE

HFI

HFO

W91810N SERIES

Publication Release Date: March 2000

- 3 - Revision A5

PIN DESCRIPTION

SYMBOL 22-PIN 24-PIN 28-PIN I/O

FUNCTION

Column-

Row Inputs

The keyboard input is compatible with a standard
6

6 or 7

7 keyboard, an inexpensive single

contact (Form A) keyboard, and electronic input.

In normal operation, any single button can be
pushed to produce dual tone, pulses, or functions.
Activation of two or more buttons will result in no
response except for a single tone.

A built-in inverter together with an inexpensive
3.579545 MHz crystal supplies the oscillator. The
oscillator stops when there is no keypad input.
The crystal frequency deviation is 0.02%.

Crystal oscillator output pin.

T/P MUTE

The T/P MUTE is a conventional CMOS N-
channel open drain output.

The output transistor turns on with a low level
during a dialing sequence (both pulse and tone
mode). Otherwise, it is off.

K MUTE

The K MUTE is a conventional CMOS N-channel
open drain output.

Toggle action speech mute control pin by MUTE
key.

MODE

Connecting the mode pin to V

places the dialer

in tone mode.

Connecting the mode pin to V

places the dialer

in pulse mode with an M/B ratio of 40:60.

Leaving the mode pin floating places the dialer in
pulse mode with an M/B ratio of 33.3:66.7.

HKS

The HKS (hook switch) input is used to sense
whether the handset is on-hook or off-hook.

In on-hook state, HKS = 1: chip is in sleeping
mode, no operation.

In off-hook state, HKS = 0: chip is enabled for
normal operation.

HKS pin is pulled to V

by internal resistor.

W91810N SERIES

- 4 -

Pin Description, continued

SYMBOL 22-PIN 24-PIN 28-PIN I/O

FUNCTION

(W91810N/81
0AN/812N/812
AN/811AN/813
AN only)

The key tone output is a conventional CMOS
inverter. The key tone is generated when any valid
key is pressed; the KT pin generates a 1.2 KHz
square wave at 35 mS. When no key is pressed,
the KT pin remains in low state.

LOCK

(W91810LN/
810ALN/
811ALN only)

The function of this terminal is to prevent "0"
dialing and "9" dialing under PABX system long
distance call control. When the first key input after
reset is 0 or 9, all key inputs, including the 0 or 9
key, become invalid and the chip generates no
output. The telephone is reinitialized by a reset.

The function of the LOCK pin is shown below:

LOCK PIN

FUNCTION

Floating

"0", "9" dialing inhibited

Normal dialing Mode

"0" dialing inhibited

H/P MUTE

The H/P MUTE is a conventional inverter output.
During pulse dialing, flash break or hold period,
this output is active high; otherwise, it remains in
low state.

O N-channel open drain dialing pulse output.

Flash key will cause DP to be active in either tone
mode or pulse mode.

In lock mode, the DP remains low for 300 mS
during off-hook delay time.

The timing diagram for pulse mode is shown in
Figure 1(a, b).

W91810N SERIES

Publication Release Date: March 2000

- 5 - Revision A5

Pin Description, continued

SYMBOL 22-PIN 24-PIN 28-PIN I/O

FUNCTION

DTMF

O During pulse dialing, this pin remains in a low state

regardless of the keypad input. In tone mode, it will
output a dual or single tone.
A detailed timing diagram for tone mode is shown in
Figure 2(a, b).

Specified

697

770

852

941

1209

1336

1477

699

766

848

948

1216

1332

1472

Actual

+0.28

-0.52

-0.47

+0.74

+0.57

-0.30

-0.34

Error %

OUTPUT FREQUENCY

, V

16, 8

18, 8

21, 9

Power input pins for the dialer chip. V

is the power

and V

is the ground.

V1, V2

14, 15

O Volume control output pins. These two pins can be

toggled by the volume control keys (Vup, Vdown).
These two pins output is a conventional CMOS N-
channel open drain output.

HFI , HFO

12, 13 13, 16 I, O Handfree control pins.

A low pulse on the HFI input pin toggles the handfree
control state. The status of the handfree control state
is listed in the following table:

HOOK SW.

On Hook

Off Hook

On Hook

Off Hook

CURRENT STATE

NEXT STATE

HFO

Low

High

Low

High

INPUT

HFI

Off Hook

On Hook

HFO

High

Low

High

DIALING

Yes

The HFI pin is pulled to V

by an internal resistor.

A detailed timing diagram is shown in Figure 3.

W91810N SERIES

- 6 -

BLOCK DIAGRAM

DTMF

HKS

MODE

RAM

COUNTER

SYSTEM CLOCK

GENERATOR

LOCATION

LATCH

D/A

ROW & COLUMN

PROGRAMMABLE

COUNTER

DATA LATCH

& DECODER

READ/WRITE

HFI

ROW

(R1 ~ R7)

COLUMN
(C1 ~ C6)

T/P MUTE

HFO

CONTROL

LOGIC

PULSE

CONTROL

LOGIC

KEYBOARD

INTERFACE

CONVERTER

LOCK

H/P MUTE

K MUTE
V1
V2

FUNCTIONAL DESCRIPTION

Keyboard Operation

EM1

EM2

Page

EM3

R/P

SAVE R4

/R5

MUTE R6

M10

EM1

M11

EM2

Page

M12

EM3

R/P

M13

SAVE R4

M14

Vx/R5

MUTE R6

M15

M16

M17

M18

M19

Vup

Vdown R7

S: Store function key

W91810N SERIES

Publication Release Date: March 2000

- 7 - Revision A5

Page: Indirect repertory memory dialing function key

H: Hold function key

R: One key redial function key

R/P: Redial and pause function key

*/T: * in tone mode and P

T key in pulse mode

SAVE: Save function key for one-touch 32-digit memory

MUTE: Mute function key for speech mute

M9: One touch memory. The dialing number can be stored in M0

M9 locations by the S key.

Note that the two touch memory (Page+ 0... Page+9) share the same memory buffer with
M10

M19, respectively

M10, ..., M19: One touch or two touch memory keys. If there are no M10

M19 keys,

Page+(M0

M9) can be used to simulate M10

M19.

EM1, ..., EM3: Emergency one-touch memory key

A: Indiect repertory dialing function key

F1, ..., F4: Flash function keys: F1 = 600 mS, F2 = 300 mS, F3 = 73 mS, F4 = 100 mS; all flash

pause time is 1.0 S

Note: D1, ..., Dn, D1`, ..., Dn`,

/T, #, Mm: M0, ..., M9, Mn: M0, ..., M19, Ln: 0

PAGE

M10

M19

Normal Dialing

OFF HOOK (or

ON HOOK

HFI

), D1 ,

D2 ,

...

, Dn

1. D1, D2,

...

, Dn will be dialed out.

2. Dialing length is unlimited, but redial is inhibited if length oversteps 32 digits in normal dialing.

Redialing Dialing

1. OFF HOOK (or

ON HOOK

HFI

, D1 , D2 ,

...

, Dn , BUSY

Come

ON HOOK , OFF HOOK (or ON HOOK &

HFI

), R/P

The R/P key can execute redial function only as first key-in after off-hook. Otherwise, it will invoke

the pause function.

2. OFF HOOK (or ON HOOK &

HFI

), D1 , D2 , ..., Dn , R

a. The one-key redial function timing diagram is shown in Figure 5.

b. If dialing of D1 to Dn is finished, pressing R key will cause the pulse output pin to

go low for 2.2 seconds break time and a 600ms pause will automatically be added.

W91810N SERIES

- 8 -

c. If the pulses of the dialed number

D1 to Dn have not finished, R will be ignored.

3. OFF HOOK (or ON HOOK & HFI

), D1 , D2 , ..., Dn , Busy ON HOOK

come, OFF HOOK , OKR (or R/P )

If R is the first key after OFF HOOK, it only can execute the redialing function but will not cause

the pulse output pin to go low for the break time of 2.2 seconds.

Number Store

1. OFF HOOK (or ON HOOK & HFI

), D1 , D2 , ..., Dn , S , S ,

Mn (or PAGE , Ln or EMn or SAVE or PAGE , Mm )

a. The dialing out of

D1 to Dn must first be finished before the S key is pressed.

b. D1, D2,

...

, Dn will be stored in memory location Mn or saved and then dialed out.

2. OFF HOOK (or ON HOOK & HFI

), S , D1 , D2 , ..., Dn , S ,

Mn (or Ln or EMn or SAVE or PAGE , Mm )

a. D1, D2,

...

, Dn will be stored in memory location, Mn (or saved), but will not be dialed out.

b. R/P and */T keys can be stored as a digit in memory, but the R/P key cannot be the

first digit. In store mode, R/P is the pause function key.

c. The store mode is released after the store function is executed or when the state of the hook
switch changes or the flash function is executed.

Save

OFF HOOK (or ON HOOK &

HFI

), D1 , D2 , ..., Dn , SAVE

a. D1, D2, ..., Dn will be dialed out.

b. If the dialing of D1 to Dn is finished, pressing SAVE will duplicate D1 to Dn to the save

memory.

OFF HOOK (or ON HOOK &

HFI

come on

OFF HOOK (or ON HOOK &

HFI

), SAVE

c. D1 to Dn will be dialed out after the

SAVE key is pressed.

W91810N SERIES

Publication Release Date: March 2000

- 9 - Revision A5

Repertory Dialing Procedure

One-touch direct repertory dialing:

OFF HOOK (or ON HOOK & HFI

), Mn (or

EMn

SAVE )

Two-touch direct repertory dialing:

OFF HOOK (or ON HOOK & HFI

), Page , Ln (or

Mn )

Access Pause

OFF HOOK (or ON HOOK & HFI

), D1 , D2 , R/P , D3 , ..., Dn

1. The pause function can be stored in memory.

2. The pause function is executed with normal dialing, redialing or memory dialing.

3. The pause function timing diagram is shown in Figure 6.

Pulse-to-tone (*/T)

OFF HOOK (or ON HOOK & HFI

), D1 , D2 , ..., Dn , */T , D1' ,

, D2' , ..., Dn'

1. If the mode switch is set in pulse mode, then it will perform

D1, D2, ---, Dn, Pause, (3.6 sec), D1', D2', ---, Dn'
(Pulse) (Tone)

2. If the mode switch is set in tone mode, then the output signal will be:

D1, D2, ---, Dn, * , D1', D2', ---, Dn'
(Tone) (Tone)
3. It can be reset to pulse mode only if ON HOOK is active. This is because it remains in tone mode
when the digits have been dialed out.

4. The function timing diagram is shown in Figure 7.

Flash

OFF HOOK (or ON HOOK & HFI

), Fn

1. Fn = F1

F4. If Fn is pressed, the dialer will execute a flash break time of 600 mS (F1), 300 mS

(F2), 73 mS (F3) or 100 mS (F4) and a pause time of 1.0 second, after which the next digit is dialed
out.

2. The flash key has the first priority of the keyboard function only one flash key will be released to
the user.

3. When the flash key is key in, the system will return to the initial state after the flash pause time is
finished.

4. The flash function timing diagram is shown in Figure 8.

W91810N SERIES

- 10 -

Cascaded Dialing

OFF HOOK (or ON HOOK & HFI

)

1. Normal Dialing + Repertory Dialing + Normal Dialing

(1st sequence) (2nd sequence)

2. Repertory Dialing + Normal Dialing + Repertory Dialing

(1st sequence) (2nd sequence)

Redialing + Normal Dialing + Repertory Dialing

(1st sequence) (2nd sequence)

Redialing is valid only for the first key-in.

The second sequence should not be operated until the first sequence is dialed out completely.

Mute

OFF HOOK , MUTE

MUTE has an on/off toggle function.

ABSOLUTE MAXIMUM RATING

PARAMETER

SYMBOL

RATING

UNIT

DC Supply Voltage

-V

-0.3 to +7.0

-0.3

Input/Output Voltage

+0.3

-0.3

+0.3

Power Dissipation

120

Operation Temperature

OPR

-20 to +70

Storage Temperature

STG

-55 to +150

Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.

W91810N SERIES

Publication Release Date: March 2000

- 11 - Revision A5

DC CHARACTERISTICS

= 2.5V, Fosc. = 3.58 MHz, T

= 25

C, all outputs unloaded)

PARAMETER

SYM.

CONDITIONS

MIN. TYP. MAX. UNIT

Operating Voltage

2.0

5.5

Operating Current

Tone

0.4

0.6

Pulse

0.2

0.4

Standby Current

HKS = 0, No load &
No key entry

Memory Retention Current

HKS = 1, V

= 1.0V

0.2

Tone Output Voltage

Row group, R

= 5 K

130

150

170

mVrms

Pre-emphasis

Col/Row, V

= 2.0

5.5V

DTMF Distortion

THD

= 5 K

= 2.0

5.5V

-30

-23

DTMF Output DC Level

TDC

= 5 K

= 2.0

5.5V

1.0

3.0

DTMF Output Sink Current

= 0.5V

0.2

DP Output Sink Current

= 0.5V

0.5

T/P MUTE Output Sink
Current

= 0.5V

0.5

KT Drive/Sink Current

KTH

= 2.0V

0.5

KTL

= 0.5V

0.5

HFO Drive/Sink Current

HFH

= 2.0V

0.5

HFL

= 0.5V

0.5

K MUTE Sink Current

KML

= 0.5V

0.5

H/P MUTE

HPH

= 2.0V

0.5

Drive/Sink Current

HPL

= 0.5V

0.5

Keypad Input Drive Current

= 0V

HKS Pull High Resister

RHKS

300

500

Keypad Input Sink Current

= 2.5V

200

400

Keypad Resistance

5.0

W91810N SERIES

- 12 -

AC CHARACTERISTICS

PARAMETER

SYM.

CONDITIONS

MIN.

TYP.

MAX. UNIT

Key-in Debounce

KID

Key Release Debounce

KRD

On-hook Debounce

OHD

Lock Mode

Unlock Mode

150

Pre-digit Pause

PDP1

Mode Pin = V

10 ppS Mode Pin = Floating

33.3

Pre-digit Pause

PDP2

Mode Pin = V

20 ppS Mode Pin = Floating

16.7

Inter Digit Pause

(Auto Dialing)

IDP

10 ppS

(Unless W91810N/ W91810AN/
810LN/810ALN/811AN/811ALN
only

)

800

20 ppS

(W91812N/812AN/813AN only)

500

Interdigit Pause

IDP

10 ppS

800

(Auto dialing)

20 ppS

500

Make/Break Ratio

M:B

Mode Pin = V

40:60

Mode Pin = Floating

33.3:66.7

Tone Output Duration

Intertone Pause

ITP

Flash Break Time

600

300

100

Flash Pause Time

1.0

Pause Time

3.6

Key Tone Frequency

1.2

KHz

Key Tone Duration

KTD

One-key Redialing
Pause Time

600

One-key Redialing
Break Time

2.2

First Key-in Delay

FKD

Lock only

300

Notes:
1. Crystal parameters suggested for proper operation are Rs < 100

, Lm = 96 mH, Cm = 0.02 pF, Cn = 5 pF, Cl = 18 pF,

Fosc. = 3.579545 MHz

0.02%.

2. Crystal oscillator accuracy directly affects these times.

W91810N SERIES

Publication Release Date: March 2000

- 13 - Revision A5

VOLUME CONTROL FLOW CHART

Vol-set2:

V1 = 0,

V2 = 1

In handset

mode

Volume

set

In handfree

mode

Volume set

Volume data

can't be changed

, and will out

handfree data

In hold mode

Hold

release by

handfree

Yes

In handfree

mode

In handset

mode

Vol-set1:

V1 = 0,

V2 = 1

Off-hook

Yes

On line

Volume initial

data: V1 = 0,

V2 = 1

W91810N SERIES

Publication Release Date: March 2000

- 15 - Revision A5

TIMING WAVEFORMS

Figure 1(a) Pulse Mode Tming Diagram (Normal dialing without lock)

Figure 1(b) Pulse Mode Timing Diagram (Normal dialing with lock function)

KID

IDP

PDP

KID

IDP

PDP

HKS

KEY IN

T/P MUTE

<300

LOW

OSC.

H/ P MUTE

DTMF

OSC.

IDP

KID

IDP

PDP

KEY IN

LOW

OSC.

H/P MUTE

DTMF

OSC.

<300 mS

FKD

HKS

T/P MUTE

W91810N SERIES

Publication Release Date: March 2000

- 17 - Revision A5

Timing Waveforms, continued

Figure 2(a) Tone Mode Timing Diagram (Normal dialing without lock)

Figure 2(b) Tone Mode Timing Diagram (Normal dialing with lock function)

KID

HIGH

OSC.

DTMF

OSC.

ITP

KRD

ITP

KRD

KID

ITP

KRD

LOW

H/P MUTE

DTMF

HKS

KEY IN

T/P MUTE

HIGH

OSC.

ITP

KRD

ITP

KRD

KID

ITP

KRD

LOW

FKD

DTMF

OSC.

H/P MUTE

HKS

KEY IN

T/P MUTE

W91810N SERIES

Publication Release Date: March 2000

- 19 - Revision A5

Timing Waveforms, continued

HIGH

OSC.

ITP

LOW

R/P

ON HOOK

KID

T > T

OHD

(return to initial state)

DTMF

OSC.

H/P MUTE

HKS

KEY IN

T/P MUTE

Figure 2(e) Tone Mode Timing Diagram with On-hook Debounce (Auto dialing)

HIGH

CHIP ENABLE

T/P MUTE

H/P MUTE

LOW

HKS

H KEY

OFF HOOK

ON HOOK

Note: The H KEY can not be enabled during chip dissable.

HFI

HFO

Figure 3(a)

W91810N SERIES

- 20 -

Timing Waveforms, continued

Figure 3(b)

Note: The H KEY and HFI inputs will toggle the HFO signal. The first time HFI or H KEY are activated, the HFO signal will go
high and the previous active input will be neglected.

HIGH

ON HOOK

CHIP ENABLE

T/P MUTE

H/P MUTE

HKS

H KEY

HFI

HFO

Figure 3(c)

Note: The HKS signal change of state from high to low will initialize both the HFO and H/P MUTE signals.

HIGH

OFF HOOK

CHIP ENABLE

T/P MUTE

H/P MUTE

HKS

H KEY

HFI

HFO

W91810N SERIES

Publication Release Date: March 2000

- 21 - Revision A5

Timing Waveforms, continued

IDP

PDP

LOW

OSC

CHIP ENABLE

DTMF

OSC.

ON HOOK

FKD

KID

T<T

OSC.

OHD

H/P MUTE

HKS

KEY IN

T/P MUTE

OHD

FKD

Figure 4 Lock Function Timing Diagram

OKR

IDP

KID

IDP

PDP

LOW

OSC
.

HKS

KEY IN

T/P MUTE

H/P MUTE

DTMF

OSC.

LOW

PDP

Figure 5 Pulse Mode One-key Dedialing Timing Diagram

W91810N SERIES

- 24 -

PAD LIST

PAD

NO.

PAD

NAME

PIN

NAM

PAD

NO.

PAD

NAME

PIN

NAM

COL 1

-441.50

987.80

VOL<2>

172.70

-1008.00

COL 2

-606.50

987.80

HF0

355.20

-1008.00

COL 3

-787.00

987.80

HKSB

520.20

-1008.00

COL 4

-952.00

987.80

DPS

702.80

-1008.00

COL 5

-928.00

703.60

DTMF

914.60

-1027.60

COL 6

-928.00

538.60

MODE

942.60

-732.40

LOCK

-928.00

345.00

942.60

-532.70

-928.00

180.00

KMUTEB

961.80

-341.80

HPMUTE

-928.00

-10.00

ROW 1

968.40

975.30

OPTION

-928.00

-175.00

ROW 2

790.60

995.80

-928.00

-379.20

ROW 3

610.10

995.80

OSCIN

-936.00

-880.70

ROW 4

445.10

995.80

OSCOUT

-866.50

-1055.20

ROW 5

264.60

995.80

TPMUTE

-647.50

-1055.00

ROW 6

99.60

995.80

HF1

-456.50

-1055.00

VOT<1>

-190.50

-1055.00

W91810N SERIES

Publication Release Date: March 2000

- 25 - Revision A5

Headquarters

No. 4, Creation Rd. III,
Science-Based Industrial Park,
Hsinchu, Taiwan
TEL: 886-3-5770066
FAX: 886-3-5792766
http://www.winbond.com.tw/
Voice & Fax-on-demand: 886-2-27197006

Taipei Office

11F, No. 115, Sec. 3, Min-Sheng East Rd.,
Taipei, Taiwan
TEL: 886-2-27190505
FAX: 886-2-27197502

Winbond Electronics (H.K.) Ltd.

Rm. 803, World Trade Square, Tower II,
123 Hoi Bun Rd., Kwun Tong,
Kowloon, Hong Kong
TEL: 852-27513100
FAX: 852-27552064

Winbond Electronics North America Corp.
Winbond Memory Lab.
Winbond Microelectronics Corp.
Winbond Systems Lab.

2727 N. First Street, San Jose,
CA 95134, U.S.A.
TEL: 408-9436666
FAX: 408-5441798

Note: All data and specifications are subject to change without notice.

W91810N SERIES

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TYPICAL APPLICATION CIRCUIT

BR1 4004x 4

1N4148

Q1
A42

Q2 A92

R1
1K

R4 22K

R2
1K

R8
10M

RV1

220V

SW1

HOOK SW

R9 120K

100u

1N4148

22K

2N1815

R10
1M

R11

330K

R12

470K

C6 104

2N1815

R13
10K

4.7u

C9
100u

1N4148

R14 220K

R17
100K

R18 33K

C10

10u

C11

102

2N1815

R15

220K

R16

220K

2N1815

1N4148

22K

2N1815

R3
1K

LED

R19
20K

D7
3V

D16
5.1V

R20
2.2K

C12

1uF/50V

2N1815

R7 22K

VDD

SPEECH

NETWORK

OFF HOOK

ON HOOK

SW3

TONE

PULSE

"0"

SW4

"0,9"

TIP

RING

WE285

Vx/R5

SW2

Handfree

0.1u

R42
150K

1N4148

XTAL

3.58MHz

30p

C1 C2 C3 C4 C5 C6

H/P MUTE

HFI

T/P MUTE

LOCK

VSS XT1

XT1

*/T

R/P

M01
M02

M03

SAVE

M04

M05

M06

M07

M08

M09

M10

M11

M12

M13

M14

M15

M16

M17

M18

M19

M00

Page

Vx/R5

OKR

Vup

Vdown

MUTE

EM2

EM3

EM1

VDD

W91810N Series

DTMF

HFO

VDD

HKS

MODE

K MUTE

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W91811AN

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W91811AN