ST3917BN datasheet(11/16 Pages) STMICROELECTRONICS

No. de pieza	ST3917BN

Descripción Electrónicos	SPEECH - TONE/PULSE DIALER - LED INDICATOR

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Fabricante Electrónico	STMICROELECTRONICS [STMicroelectronics]

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C1

C2

C3

SEL

OSC

P ULSE

MODE /PT

HKS

GND

RXOUT

GRX

RXIN

I

REF

V

CC

R1

R2

R3

R4

MU/MFI

V

DD

GDTMF

MIC+

MIC-

GTX

REG

LN

ILINE

LED

ST3917A/B

123

456

789

*

0#

FLASH

TONE/P ULS E

P AUSE

LND

S ECRET

Col

Row

3.58MHz

mA

IPL

V

DD

100k

Ω

Pulse

Tone

SW2

SW1

RGRX

100pF

10 F

Re

3.9k

Ω

+

100 F

+

620

Ω

I

CC

100nF

RDTMF

CDTMF

470nF

1 F

RGTX

100pF

4.7 F

+

RA

LED

I

LED

RB

130k

Ω

3.9k

Ω

390

Ω

20

Ω

390

Ω

600

Ω

100 F

+

I

LN

I

DD

V

LN

Figure 6 : Test

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28

C1

C2

C3

SEL

OS C

P ULS E

MODE /P T

HKS

GND

RXOUT

GRX

RXIN

I

RE F

V

CC

R1

R2

R3

R4

MU/MFI

V

DD

GDTMF

MIC+

MIC-

GTX

REG

LN

ILINE

LED

S T3917A/B

123

456

789

*

0#

FLASH

TONE/P ULSE

P AUSE

LND

S ECRET

Col

Row

3.58MHz

V

MR

100k

Ω

P ulse

Tone

SW2

SW1

RGRX

100pF

10 F

Re

3.9k

Ω

+

100 F

+

620

Ω

100nF

RDTMF

CDTMF

470nF

1 F

RGTX

100pF

4.7 F

+

LED

130k

Ω

3.9k

Ω

390

Ω

20

Ω

390

Ω

I

MR

470k

Ω

Figure 7 : Test

ST3917A - ST3917B

11/16

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ST3917BN Datasheet(PDF) 11 Page - STMicroelectronics

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