MAX14840E Datasheet, PDF (6/15 Pages) Maxim Integrated Products – 40Mbps, +3.3V, RS-485 Half-Duplex Transceivers

40Mbps, +3.3V, RS-485 Half-Duplex
Transceivers
Test and Timing Diagrams (continued)
0 OR VCC ^DI _D
A
S1
B
DE
GENERATOR
50I
VCC
RL = 110I
OUT
DE
t_DZL, t_DZL(SHDN)
V_CC
OUT
1.5V
V_OL
Figure 5. Driver Enable and Disable Times (tDLZ, tDZL)­­
1.5V
tDLZ
VCC
0
0.25V
ATE
V_ID
A
R
RECEIVER
OUTPUT
B
Figure 6. Receiver Propagation Delay Test Circuit
A
f = 1MHz, tLH P 3ns, tHL P 3ns
1V
B
VOH
RO
VOL
-1V
t_RPHL
t_RPLH
VCC
VCC
2
2
tRSKEW = tRPHL - tRPLH
Figure 7. Receiver Propagation Delays
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