HFC-Smini Cologne Chip AG, HFC-Smini Datasheet - Page 61

• Manufacturer Part Number: HFC-Smini
• Manufacturer: Cologne Chip AG

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7.1.3 External transmitter circuitry
Figure 12: External transmitter circuitry
Part List
VDD
C14
D3
D4
D5
ISDN_ST1
Q4
Q5
Q7
Q8
Q6
RE1
RE2
*)
/ TX_ E N
TX1 _ H I
value is depending on the used S/T module
R 1 8
R E 1
3.3V
560
560
G N D
470pF
BAV99
BAV99
2V7
ISDN Connector
BC850C
BC850C
BC850C
BC850C
BC860C
1%
1%
R G 1
2k2
2k2
5V
V D D
/ TX2 _ L O
R 1 6
1%
1%
C 1 4
Q 4
Q 6
Q 7
R 1 7
R F 1
G N D
R 1 9
R 2 1
Q 8
R F 2
G N D
Q 5
VDD
RF1
RF2
RG1
RG2
R16
R21
R17
R18
R19
TR1B
D 4
D 3
D 5
/ TX1 _ L O
3.3V
3k9
3k9
2k2
50
3k3
1k8
S/T Module (see Table 4 on
page 63)
G N D
R G 2
R E 2
1%
1%
18
18
2k2
1 6
1 4
1 3
*)
*)
TR 1 B
TR A N S
3k
3k
5V
3k3
100
5k6
3k3
TX2 _ H I
1
3
4
1%
1%
Cologne
Chip
I S D N _ S T1
R E C 1
R E C 2
TR A N S 2
TR A N S 1