Datasheet

+3.0V to+5.5V, 1µA, RS-232/RS-485/422
Multiprotocol Transceivers
Test Circuits (continued)
C
L
V
CC
OUTPUT
UNDER TEST
S1
S2
500Ω
Figure 4. RS-485/422 Driver Enable/Disable Timing Test Load
DI
3V
0
Z
Y
V
O
0
-V
O
V
O
1.5V
t
DPLH
1/2 V
O
10%
T
DR
90%
90%
t
DPHL
1.5V
1/2 V
O
10%
T
DF
V
DIFF
= V
y
- V
z
V
DIFF
t
DSKEW = |
t
DPLH
- t
DPHL |
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0
Y, Z
V
OL
Y, Z
0
1.5V 1.5V
V
OL
+0.5V
V
OH
-0.5V
2.3V
2.3V
t
DZL
t
DLZ
t
DZH
t
DHZ
DE485
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0
V
CC
RO
RO
0
1.5V 1.5V
V
OL
+ 0.5V
V
OH
- 0.5V
1.5V
1.5V
t
RZL
t
RLZ
t
RZH
t
RHZ
RE485
Figure 5. RS-485/422 Driver Propagation Delays
Figure 6. RS-485/422 Driver Enable and Disable Times
V
OH
V
OL
A
B
1V
-1V
V
CC
/2 V
CC
/2
OUTPUT
INPUT
RO
t
RPLH
t
RPHL
V
ID
C
L
A
B
R
RO
Figure 7. RS-485/422 Receiver Propagation Delays
Figure 9. RS-485/422 Receiver Propagation Delays Test Circuit
Figure 8. MAX3162 RS-485/422 Receiver Enable and Disable
Times
Maxim Integrated
13
MAX3160/MAX3161/MAX3162