Electronic component search and free download site. Transistors,MosFET ,Diode,Integrated circuits
English
한국어
日本語
русский
简体中文
español
Part Name
Description
ST3917B View Datasheet(PDF) - STMicroelectronics
Part Name
Description
Manufacturer
ST3917B
SPEECH - TONE/PULSE DIALER - LED INDICATOR
STMicroelectronics
ST3917B Datasheet PDF : 16 Pages
First
Prev
11
12
13
14
15
16
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
470k
Ω
5
OSC
3.58MHz
6
P ULSE
P ulse
100k
Ω
Tone
SW2
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
S ECRET
V
DD
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
130k
Ω
20
Ω
390
Ω
3.9k
Ω
100nF
620
Ω
390
Ω
Figure 9 :
Test
V
DD
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
470k
Ω
5
OSC
3.58MHz
6
P ULSE
P ulse
100k
Ω
Tone
S W2
7
MODE/PT
8
HKS
SW1
9
GND
RGR X
+
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
S ECRET
V
DD
2 3
R DTMF
GDTMF
22
C DTMF
MIC+
21
1F
MIC-
20
1F
470nF
GTX = 20 log
V
LN
Vmic
Vmic
GTX
19
R GTX
+
4.7 F
100pF
REG
18
V
LN
LN
17
ILINE
16
LED
15
LED
+
100 F
130k
Ω
I
LN
600
Ω
20
Ω
390
Ω
3.9k
Ω
100nF
620
Ω
390
Ω
12/16
Share Link:
datasheetq.com [
Privacy Policy
]
[
Request Datasheet
] [
Contact Us
]