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Número de pieza
componentes Descripción
ST3917BD Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
ST3917BD
SPEECH - TONE/PULSE DIALER - LED INDICATOR
STMicroelectronics
ST3917BD Datasheet PDF : 16 Pages
First
Prev
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16
ST3917A - ST3917B
Figure 6 :
Test
V
DD
1
C1
ST3917A/B
R1
28
1 2 3
FLASH
Row
2
C2
R2
27
4 5 6 TONE/P ULSE
Col
3
C3
R3
26
7 8 9
P AUSE
4
SEL
IPL
mA
5
OSC
3.58MHz
6
P ULSE
Pulse
100k
Ω
Tone
S W2
7
MODE/PT
8
HKS
S W1
9
GND
RGRX
+
10
RXOUT
11
GRX
10 F
Re
100pF
12
RXIN
3.9k
Ω
1 3
I
REF
+
100 F
1 4
V
CC
R4
25
MU/MFI
24
*
0 #
LND
SECRET
V
DD
2 3
GDTMF
22
R DTMF
C DTMF
MIC+
21
MIC-
20
GTX
19
1F
1F
R G TX
100pF
REG
18
LN
17
ILINE
16
I
LED
LED
15
470nF
+
4.7 F
RA
LED
RB 130k
Ω
I
DD
V
LN
+
100 F
I
LN
600
Ω
20
Ω
390
Ω
3.9k
Ω
100nF
I
CC
620
Ω
390
Ω
Figure 7 :
Test
V
MR
1
C1
S T3917A/B
R1
28
1 2 3
FLASH
Row
2
C2
R2
27
4 5 6 TONE/P ULSE
Col
I
MR
3
C3
R3
26
7 8 9
P AUS E
4
SEL
470k
Ω
5
OSC
3.58MHz
6
P ULSE
P ulse
100k
Ω
Tone
S W2
7
MODE/PT
8
HKS
S W1
9
GND
RGRX
+
10
RXOUT
11
GRX
10 F
Re
100pF
12
RXIN
3.9k
Ω
13
I
REF
+
100 F
14
V
CC
R4
25
MU/MFI
24
*
0 #
LND
SECRET
V
DD
2 3
GDTMF
22
R DTMF
C DTMF
MIC+
21
MIC-
20
GTX
19
1F
1F
R G TX
100pF
REG
18
470nF
+
4.7 F
LN
17
ILINE
16
LED
LED
15
130k
Ω
20
Ω
390
Ω
3.9k
Ω
100nF
620
Ω
390
Ω
11/16
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