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| SP335E_17 Datasheet, PDF (15/23 Pages) Exar Corporation – TRANSCEIVER WITH INTERNAL TERMINATION | |||
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SP335E
REV. 1.0.2
RS-232/RS-485/RS-422 TRANSCEIVER WITH INTERNAL TERMINATION
FIGURE 10. RS-485/422 RECEIVER PROPAGATION DELAY
B
A
B
A
RO
R
RE = 0V
tRPLH
VL
2
RO
CL
tRPHL
VL
2
+1V
0V
-1V
VOH
VOL
FIGURE 11. RS-485/422 DRIVER PROPAGATION DELAY AND RISE/FALL TIMES
Z
DI
D
VOD RL
CL
DI
VL
0V
Z
VOD
(VY - VZ)
Y
VOD+
0V
VOD-
DE = VL
Y
VL
2
tDPLH
VL
2
VOD
tSKEW = |tDPHL â tDPLH|
tDPHL
90%
10%
tDR
90%
10%
tDF
15
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