W91F810N SERIES

23-FLASH MEMORY TONE/PULSE DIALER WITH

HANDFREE, LOCK AND HOLD FUNCTIONS

Publication Release Date: March 2000

- 1 - Revision A2

GENERAL DESCRIPTION

The W91F810N is a series of tone/pulse switchable telephone dialers with 23-falsh 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 flash-memory

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

The read-write times: 10

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-pin 400 mil, 24-pin 600 mil or 28-pin 600 mil dual-in-line plastic package

The different dialers in the W91F810N series are shown in the following table:

TYPE NO.

PULSE

(ppS)

FLASH-MEMORY

LOCK

KEY

TONE

HANDFREE

DIALING

VOLUME

CONTROL

PACKAGE

(PINS)

W91F810N

13 one touch, 10 two touch

W91F810AN

13 one touch, 10 two touch

W91F810LN

13 one touch, 10 two touch

W91F810ALN

13 one touch, 10 two touch

W91F811AN

23 one touch

W91F811ALN

23 one touch

W91F812N

13 one touch, 10 two touch

W91F812AN

13 one touch, 10 two touch

W91F813AN

23 one touch

W91F810N SERIES

- 2 -

PIN CONFIGURATIONS

MODE

DTMF

HKS

T/P MUTE

LOCK

W91F810LN

H/P MUTE

K MUTE

MODE

DTMF

HKS

T/P MUTE

LOCK

H/P MUTE

K MUTE

HFI

HFO

W91F811ALN

W91F810ALN

MODE

DTMF

HKS

T/P MUTE

LOCK

H/P MUTE

K MUTE

HFI

HFO

MODE

DTMF

HKS

T/P MUTE

W91F810N/F812N

H/P MUTE

K MUTE

MODE

DTMF

HKS

T/P MUTE

H/P MUTE

K MUTE

HFI

HFO

W91F811AN/F813AN

W91F810AN/F812AN

MODE

DTMF

HKS

T/P MUTE

H/P MUTE

K MUTE

HFI

HFO

W91F810N SERIES

Publication Release Date: March 2000

- 3 - Revision A2

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.

(W91F810N/F8
10AN/F812N/F
812AN/F811AN
/F813AN 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.

W91F810N SERIES

- 4 -

Pin Description, continued

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

FUNCTION

LOCK

(W91F810LN/
F810ALN/
F811ALN 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.
The timing diagram for pulse mode is shown in
Figure 1(a, b).

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

W91F810N SERIES

Publication Release Date: March 2000

- 5 - Revision A2

Pin Description, continued

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

FUNCTION

, 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.

W91F810N 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

W91F810N SERIES

Publication Release Date: March 2000

- 7 - Revision A2

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: Indirect 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.

W91F810N 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.

W91F810N SERIES

Publication Release Date: March 2000

- 9 - Revision A2

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.

W91F810N SERIES

- 10 -

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

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.

W91F810N SERIES

Publication Release Date: March 2000

- 11 - Revision A2

DC CHARACTERISTICS

= 2.5V, Fosc. = 3.58 MHz, T

= 25

C, all outputs unloaded)

PARAMETER

SYM.

CONDITIONS

MIN. TYP. MAX. UNIT

Operating Voltage

2.4

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

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

, V

2.0

5.5V

-30

-23

DTMF Output DC Level

TDC

= 5 K

, V

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

W91F810N 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 91F810N/W91F810AN/

810LN/F810ALN/F811AN/

F811ALN only

)

800

20 ppS

(W91F812N/F812AN/F813AN

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.

W91F810N SERIES

Publication Release Date: March 2000

- 15 - Revision A2

TIMING WAVEFORMS

KID

IDP

PDP

KID

IDP

PDP

HKS

KEY IN

T/P MUTE

LOW

OSC.

H/ P MUTE

DTMF

OSC.

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

IDP

KID

IDP

PDP

KEY IN

LOW

OSC.

H/P MUTE

DTMF

OSC.

<300 mS

FKD

HKS

T/P MUTE

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

W91F810N SERIES

Publication Release Date: March 2000

- 17 - Revision A2

Timing Waveforms, continued

KID

HIGH

OSC.

DTMF

OSC.

ITP

KRD

ITP

KRD

KID

ITP

KRD

LOW

H/P MUTE

DTMF

HKS

KEY IN

T/P MUTE

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

HIGH

OSC.

ITP

KRD

ITP

KRD

KID

ITP

KRD

LOW

FKD

DTMF

OSC.

H/P MUTE

HKS

KEY IN

T/P MUTE

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

W91F810N SERIES

Publication Release Date: March 2000

- 19 - Revision A2

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)

W91F810N SERIES

- 20 -

Timing Waveforms, continued

HIGH

OFF HOOK

CHIP ENABLE

T/P MUTE

H/P MUTE

HKS

H KEY

HFI

HFO

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.

W91F810N SERIES

Publication Release Date: March 2000

- 21 - Revision A2

Timing Waveforms, continued

IDP

PDP

LOW

OSC.

CHIP
ENABLE

DTMF

OSC.

ON HOOK

FKD

KID

OSC.

OHD

H/P MUTE

HKS

KEY IN

T/P MUTE

OHD

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 Redialing Timing Diagram

W91F810N SERIES

- 24 -

PAD LIST

PAD

NO.

PAD

NAME

PIN

NAME

PAD

NO.

PAD

NAME

PIN

NAME

COL 1

-450.39

1030.70

VOL<2>

286.63

-1048.00

COL 2

-615.39

1030.70

HF0

469.13

-1048.00

COL 3

-830.39

1030.70

HKSB

634.13

-1048.00

COL 4

-1065.94

1030.70

DPPB

816.73

-1039.61

COL 5

-1041.94

746.50

DTMF

1028.53

-1059.31

COL 6

-1041.94

581.50

MODE

1056.53

-720.00

LOCK

-1041.94

387.90

VDD

1056.53

-520.30

-1041.94

222.90

KMUTEB

1075.73

-298.90

HPMUTE

-1041.94

32.90

ROW 1

1082.33

1018.20

OPTION

-1041.94

-132.10

ROW 2

904.53

1038.70

VSS

-1041.94

-364.80

ROW 3

724.03

1038.70

OSCIN

-1043.94

-895.89

ROW 4

559.03

1038.70

OSCOUT

-980.44

-1095.00

ROW 6

378.53

1038.70

TPMUTE

-656.39

-1095.00

ROW 7

213.53

1038.70

HF1

-465.39

-1095.00

VOT<1>

-199.39

-1095.00

W91F810N SERIES

Publication Release Date: March 2000

- 25 - Revision A2

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.

W91F810N SERIES

- 26 -

TYPICAL APPLICATION CIRCUIT

Page

*/T

R/P

BRIDGE

TIP

RING

A42

A94

R1
3.3K

33K

200K

OFF HOOK

ON HOOK

R4
3K

1N4148

100u

1815

4.7u

10K

C1815

R10

300K

PULSE

TONE

RV1

VAR1

R10

R42

150K

R43

10M

R44

470K

104

5.1V

100u

VX/R5

R14

220K

R15

100K

R18

33K

10u

1815

EM1

EM2

EM3

SAVE

C1 C2 C3 C4

LOCK

W91F810N Series

H/P

MUTE VSS XT XT

HFI

R4 R3 R2 R1 K-MUTE VDD

MODE

DTMF DP

HKS HFO

VX/R5

1015

22K

220K

R10
1K

D10

LED

1815

R12

220K

102

SPEECH

NETWORK

"0,9"

VDD

"0"

3.58M

30P

C10

30P

C11

104

SW3

HFI

T/P

MUTE

R14
20K

ZD3

285

R20
2.2K

C12

1u/50V

D11

1N4148

VDD

R16
22K

Q10

1815

C5 C6

M00 M10

M01 M11

M02 M12

M03 M13

M04 M14

M05

M15

M06

M16

M07

M17

M08

M18

M09

M19

OKR

Vup

MUTE

Vdown

Ð­Ð»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W91F812N

ÐÐ»ÐµÐºÑ‚Ñ€Ð¾Ð½Ð½Ñ‹Ð¹ ÐºÐ¾Ð¼Ð¿Ð¾Ð½ÐµÐ½Ñ‚: W91F812N