Datasheet

LTC1535
8
1535fb
TEST CIRCUIT
2
**
D
Y
Z
Y
Z
SLO
2
1
1
R
A
B
RO2
1535 F01
V
CC
RO
RE
DE
DI
GND
LOGIC COMMON
2
2
FLOATING RS485 COMMON ** COOPER (888) 414-2645
SLOW SLEW
RATE JUMPER
420kHz
28
27
26
25
4
17
15
16
18
12
13
1411
1
+
+
GND2
1/2 BAT54C
1/2 BAT54C
V
CC2
ST1 ST2
32
V
CC
RO
1
10μF
10μF
2
CTX02-14659
I
LOAD
I
EXT
V
CC2
I
VCC2
R
L
C2
50pF
2
C1
50pF
f
RO
= MAX
BAUD
RATE
Figure 1. Self-Oscillation at Maximum Data Rate (Test Confi guration for the First Six Typical Performance Characteristics Curves)
V
OD
Y
Z
R
R
V
OC
1535 F02
RECEIVER
OUTPUT
C
RL
1k
S1
S2
TEST POINT
V
CC
1k
1535 F03
3V
DE
Y
Z
DI
R
R
C
L1
C
L2
1535 F04
OUTPUT
UNDER TEST
C
L
S1
S2
V
CC
500Ω
1535 F05
Figure 2. Driver DC Test Load Figure 3. Receiver Timing Test Load
Figure 4. Driver Timing Test Circuit Figure 5. Driver Timing Test Load