MAX3430 Datasheet, PDF (7/13 Pages) Maxim Integrated Products – ±80V Fault-Protected, Fail-Safe, 1/4-Unit Load, +3.3V RS-485 Transceiver

±80V Fault-Protected, Fail-Safe,
1/4-Unit Load, +3.3V RS-485 Transceiver
Test Circuits/Timing Diagrams (continued)
V_ID
R
C_L
20pF
0
B
A
V_OH
t_RPLH
1.5V
RO
V_OL
t_RPHL
Figure 6. Receiver Propagation Delays
+1.5V
S3
R
-1.5V
V_{ID R}
RO
1kΩ
S1
S2
V_CC
C_L
20pF
GENERATOR
50Ω
3V
S1 OPEN
RE
S2 CLOSED
RE
0
t_RZH, t_RZH(SHDN)
S3 = +1.5V
3V
S1 CLOSED
1.5V
S2 OPEN
S3 = -1.5V
0
t_RZL, t_{RZL (SHDN)}
V_OH
V_CC
RO
V_OH/2
RO
(V_OL + V_CC)/2
0
V_OL
RE
1.5V
t_RHZ
RO
0.25V
3V
S1 OPEN
S2 CLOSED
S3 = +1.5V
0
V_OH
0
Figure 7. Receiver Enable and Disable Times
RE
1.5V
t_RLZ
RO
0.25V
3V
S1 CLOSED
S2 OPEN
S3 = -1.5V
0
V_CC
V_OL
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