SP490E Datasheet, PDF (4/12 Pages) Sipex Corporation – Enhanced Full Duplex RS-485 Transceivers

+3V
DI
0V
Z
DRIVER
OUTPUT _Y
DIFFERENTIAL V_O⁺
OUTPUT 0V
V_Y – V_Z ^VO^–
t_{SKEW = |} t_{DPLH -} t_{DPHL |}
f = 1MHz; t_R < 10ns; t_F < 10ns
1.5V
V_O ^1/2VO
t_PLH
t_PHL
t_DPLH
t_DPHL
t_R
1.5V
1/2V_O
t_F
Figure 5. Driver Propagation Delays
+3V
DE
0V
5V
AY, , BZ
V_OL
V_OH
A_Y, _, B_Z
0V
f = 1MHz; t_R < 10ns; t_F < 10ns
1.5V
t_ZL
2.3V _{Output normally LOW}
2.3V ^{Output normally HIGH}
t_ZH
1.5V
t_LZ
0.5V
0.5V
t_HZ
Figure 6. Driver Enable and Disable Times
V_0D2⁺
Y–Z
V_0D2^–
V_OH
R
V_OL
t_PHL
t_{SKEW = |} t_{PHL -} t_{PLH |}
f = 1MHz; t_R < 10ns; t_F < 10ns
0V
INPUT
1.5V
OUTPUT
t_PLH
Figure 7. Receiver Propagation Delays
0V
1.5V
SP490EDS/14
SP490E Enhanced Full Duplex RS-485 Transceivers
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© Copyright 2000 Sipex Corporation