U209B
| Model | U209B |
| Description | Monolithic Integrated Feature Phone Circuit |
| PDF file | Total 34 pages (File size: 675K) |
| Chip Manufacturer | ATMEL |
30 k
W
V
M
I
INLDR
I
INLDT
VATAFS
Mico
10
m
F
ZEAR
10
m
F
off
S4
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
10
m
F
62 k
W
220 nF
V
V
SAI
1
68 nF
220
m
F
1000
m
F
2
10
m
F
47
m
F
3
4
5
6
7
8
9
10
11
12
13
14
15
I
MP
16
17
18
19
V
LIDET
20
21
22
RGT
RDC
10
W
47
m
F
S1
V
1
m
F
Figure 25. Speaker amplifier
V
MIC
4.7 nF
600
W
22
m
F
50
W
Preliminary Information
U4090B
V
L
V
I
L
V
VSAO, S4 = closed
VZIN, S4 = open
n
SA
2
Input impedance: (VZIN/(VSAO – VZIN)) * RIN
Gain from SAI to SAO: 20*log (VSAO / VSAI) dB
U4090B
Output power: PSA =
VSAO
RSAO
Attenuation of transmit gain: S1 = closed
Open pins should be connected as shown in figure 25
94 9137
TELEFUNKEN Semiconductors
Rev. C1, 28-Oct-96
RGR
RGSA
20
k
W
24
23
220 nF 150 nF
1
m
F
44
43
42
31 (34)
