ST3917B Ver la hoja de datos (PDF) - STMicroelectronics
Número de pieza
componentes Descripción
Fabricante
ST3917B Datasheet PDF : 16 Pages
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ST3917A - ST3917B
Figure 8 : Test
S T3917A/B
1 C1
R1 28
123
FLASH
Row
2 C2
R2 27 4 5 6 TONE/P ULSE
Col
3 C3
R3 26 7 8 9
P AUSE
4 SEL
470kΩ
5 OSC
3.58MHz
6 P ULSE
P ulse
100kΩ
Tone SW2
7 MODE/PT
8 HKS
S W1
9 GND
RGRX
+
10 RXOUT
11 GRX
10 F
Re
100pF
12 RXIN
3.9kΩ
1 3 IREF
+
100 F
1 4 VCC
R4 25
MU/MFI 24
*0 #
LND
S ECRET
VDD 23
GDTMF 22
R DTMF
C DTMF
MIC+ 21
470nF
Imic
MIC- 20
GTX 19
R G TX
100pF
REG 18
+
4.7 F
LN 17
LED
ILINE 16
LED 15
Zmic
=
1.2
Imic
1.2V
130kΩ
20Ω
390Ω
3.9kΩ
100nF
620Ω
390Ω
Figure 9 : Test
VDD
1 C1 S T3917A/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
470kΩ
5 OSC
3.58MHz
6 P ULSE
P ulse
100kΩ
Tone S W2
7 MODE/PT
8 HKS
SW1
9 GND
RGR X
+
10 RXOUT
11 GRX
10 F
Re
100pF
12 RXIN
3.9kΩ
1 3 IREF
+
100 F
1 4 VCC
R4 25
MU/MFI 24
*0 #
LND
S ECRET
VDD 2 3
R DTMF
GDTMF 22
C DTMF
MIC+ 21
1F
MIC- 20
1F
470nF
GTX = 20 log VLN
Vmic
Vmic
GTX 19
R GTX
+
4.7 F
100pF
REG 18
VLN
LN 17
ILINE 16
LED 15
LED
+
100 F
130kΩ
ILN
600Ω
20Ω
390Ω
3.9kΩ
100nF
620Ω
390Ω
12/16
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