LTC1535_2 Datasheet, PDF (15/18 Pages) Linear Technology – Isolated RS485 Transceiver

TYPICAL APPLICATION
3V
DE
Y
R
C_L1
DI
Z
R
C_L2
1535 TA02
Figure 19. Fail-Safe Logic “0”
LTC1535
RO
A
RE
DE ^LTC1535
B
Y
DI
Z
TTL INPUT
30k
RO
A
RE
DE ^LTC1535
B
Y
DI
Z
TTL INPUT _30k
1535 TA02b
(20a) Noninverting
(20b) Inverting
Figure 20. Configuring Receiver for TTL Level Input. Y and Z Outputs Are TTL Compatible with No Modification
Full-Duplex Connection
**
CTX02-14659
1/2 BAT54C
2
+
10μF
V_CC
+
10μF
2
1
V_CC ^ST1
1
RO
28 ^RO
RE
1
V_CC
DI
RE
27
26 ^DE
25 ^DI
4 GND
1
LOGIC COMMON
1
3
ST2
420kHz
1/2 BAT54C
2
11
14
GND2 V_CC2
A
16
R
B
15
RO2
17
Y
13
D
Z
12
SLO
18
1535 TA02c
FLOATING RS485 COMMON ** COOPER [phone]
2
120Ω
120Ω
1535fb
15