Test circuits/timing diagrams (continued) – Rainbow Electronics MAX3430 User Manual
Page 7
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MAX3430
±80V Fault-Protected, Fail-Safe,
1/4-Unit Load, +3.3V RS-485 Transceiver
_______________________________________________________________________________________
7
C
L
20pF
R
0
A
B
V
OH
V
OL
1.5V
t
RPLH
t
RPHL
RO
V
ID
Figure 6. Receiver Propagation Delays
50
Ω
GENERATOR
C
L
20pF
V
CC
3V
0
V
CC
V
OL
R
+1.5V
-1.5V
V
ID
(V
OL
+ V
CC
)/2
RO
S1
S2
R
1k
Ω
RE
1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
t
RZL
, t
RZL (SHDN)
3V
0
V
OH
0
V
OH
/2
RE
S1 OPEN
S2 CLOSED
S3 = +1.5V
t
RZH
, t
RZH(SHDN)
3V
0
V
CC
V
OL
0.25V
RO
RE
1.5V
S1 CLOSED
S2 OPEN
S3 = -1.5V
t
RLZ
3V
0
V
OH
0
0.25V
1.5V
RO
RE
S1 OPEN
S2 CLOSED
S3 = +1.5V
t
RHZ
S3
RO
RO
Figure 7. Receiver Enable and Disable Times
Test Circuits/Timing Diagrams (continued)
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