SP1490E Datasheet, PDF (4/10 Pages) Sipex Corporation – Full Duplex RS-485 Transceivers

+3V
DI
0V
B
DRIVER
OUTPUT _A
DIFFERENTIAL V_O⁺
OUTPUT 0V
V_A – V_B ^VO^–
t_{SKEW = |} t_{DPLH -} t_{DPHL |}
f = 1MHz; t_R < 10ns; t_F < 10ns
1.5V
t_PLH
t_PHL
V_O ^1/2VO
t_DPLH
t_DPHL
t_R
1.5V
1/2V_O
t_F
Figure 6. Driver Propagation Delays
+3V
DE
0V
5V
A, B
V_OL
V_OH
A, B
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 7. Driver Enable and Disable Times SP1491E only
V_0D2⁺
A–B
V_0D2^–
V_OH
R
V_OL
t_PHL
t_{SKEW = |} t_{PHL -} t_{PLH |}
0V
INPUT
1.5V
OUTPUT
t_PLH
f = 1MHz; t_R < 10ns; t_F < 10ns
Figure 8. Receiver Propagation Delays
0V
1.5V
Date: 5/18/04
SP1490E/1491E Full Duplex RS-485 Transceivers
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© Copyright 2004 Sipex Corporation