Silicon Laboratories SI2493/57/34/15/04 - Manual (Page 20)

Si2493/57/34/15/04
Global ISOmodem-EVB
20 Rev. 0.6
RX
D_
T
CTS_T DS
R
_ T
CD_
T
RI
_T
TXD
_ T
RTS_T DTR_T
RX
D
_
R
CT
S
_ R
CD_R RD_R DSR
_
R
DT
R
_
R
RT
S
_
R
TXD_R
VCC
VCC
C18
+
C1
5
1.
0 uF
C1
7
+
C1
2
1.
0 uF
D1
2 MMB
Z15VD
C
R3
3
10k
C1
4
0.
1 uF
D1
3 MMBZ15VD
C
C1
3
470 pF
D11
MMB
Z15VD
C
D8
MMB
Z15VD
C
D9
MMB
Z15VD
C
D7
MMBZ15VD
C
U4
M
A
X
3237
C2+
1
C2-
3
C1+
28
C1-
25
V+
27
V-
4
T1IN
24
T2IN
23
T3IN
22
T4IN
19
T5IN
17
R1OUTB
16
R1OUT
21
R2OUT
20
R3OUT
18
EN
13
GND
2
T1OUT
5
T2OUT
6
T3OUT
7
T4OUT
10
T5OUT
12
VCC
26
R1IN
8
R2IN
9
R3IN
11
MBAUD
15
SHDN
14
D6
MMB
Z15VD
C
R3
0
10
k
R2
9
10
k
C19
R3
2
10k NI
C1
6
FB
3
TP11
D1
0 MMB
Z15VD
C
TP10
R3
1
10
k
NI
Figur
e
16.
RS-
2
32
In
te
rfa
ce Sch
e
mat
ic