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MAX13430E Datasheet, PDF (10/19 Pages) Maxim Integrated Products – RS-485 Transceivers with Low-Voltage Logic Interface
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RS-485 Transceivers with Low-Voltage
Logic Interface
Test Circuits and Waveforms (continued)
B
RECEIVER
ATE
VID
OUTPUT
R
A
Figure 6. Receiver Propagation Delay Test Circuit
A
B
tRPLH
VOH
VOL
VL/2
RO
THE RISE TIME AND FALL TIME OF INPUTS A AND B < 4ns
Figure 7. Receiver Propagation Delays
+1.5V
S3
-1.5V
VID RR
RO
1kΩ
CL
RE
15pF
S1
VL
S2
+1V
-1V
tRPHL
GENERATOR
50Ω
S1 OPEN
S2 CLOSED
S3 = +1.5V
RE
RO
S1 OPEN
S2 CLOSED
S3 = +1.5V
RE
VL/2
tRHZ
0.25V
RO
VL
0
tRZH, tRZH(SHDN)
VOH
VOH/2
0
VL
0
VOH
0
RE
RO
RE
S1 CLOSED
S2 OPEN
S3 = -1.5V
VL
VL/2
0
tRZL, tRZL(SHDN)
VL
S1 CLOSED
S2 OPEN
S3 = -1.5V
VL/2
(VOL + VL)/2
VOL
VL
0
tRLZ
VL
RO
0.25V
VOL
Figure 8. Receiver Enable and Disable Times
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