RXTX
page1
1
2
3
4
5
6
7 GND
8
470μ
14 VCC
13
12
11
10
9
LED
BD434
100n
3k9
150
18k
470
1k8
820p
+
−
RX/TX switching
S53MV 24.06.2020
+12VRX
+12VTX
/PTT
+12V
GND
TXM
GND
MOD
270
1k8
18V−1W
[10k]
27k
82
470n
(2μ2)
1
3
2
BC857
“3F”
2SB1002
“4CH”
4
1k8
820
820
LED
[10k]
18k
220
+
−
47μ
22μ
−
+
LP2951
8
6
7
5
74HCT125
−
+
47μ
GND
Error
Input
Output
Sense
Shut-
down
Feed-
back
VTAP
1206
1206
1206
1206
1206
1206
1206