SP335E Datasheet, PDF (12/22 Pages) Exar Corporation – RS-232/RS-485/RS-422 TRANSCEIVER

SP335E
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
FIGURE 3. RS-485 HALF DUPLEX MODE
REV. 1.0.0
Cc
1.0µF
C1
0.1µF
C3
0.1µF
C2
0.1µF
C4
0.1µF
32
31
30
29
28
27
26
25
1
GND
2
B/Z
3
A/Y
4
SP335
120Ì¢
5
32 pin QFN
RS-485 Half Duplex
D
24
23
DI
22
DE
21
__
RE
20
6
RO
7
8
9
19
R
18
GND
17
10
11
12
13
14
15
16
Pins 12, 13, and 20 have 300k: internal pull-downs (not shown).
Termination control follows the truth table on page 20.
12