SP1481E Datasheet, PDF (5/10 Pages) Sipex Corporation – ±15kV Enhanced Low Power Half-Duplex RS-485 Transceivers

INPUTS
RE DE DI
X11
X10
X0X
X1X
LINE
CONDITION
No Fault
No Fault
X
Fault
OUTPUTS
BA
01
10
ZZ
ZZ
Table 1. Transmit Function Truth Table
INPUTS
OUTPUTS
RE
DE
A-B
R
0
0
+0.2V
1
0
0
-0.2V
0
0
0 Inputs Open
1
1
0
X
Z
Table 2. Receive Function Truth Table
+3V
DE
0V
5V
A, B
V_OL
V_OH
A, B
0V
f = 1MHz; f= t_R < 1ns; t_F < 1ns
1.5V
t_ZL
2.3V
Output normally LOW
2.3V
t_ZH
Output normally HIGH
Figure 6. Driver Enable and Disable Times
1.5V
t_LZ
0.5V
0.5V
t_HZ
V_0D2⁺
A – B _V0D2–
0V
INPUT
V_OH
R
V_OL
t_PHL
Figure 7. Receiver Propagation Delays
1.5V
OUTPUT
f = 1MHz; t_R < 1ns; t_F < 1t^Pn^Hs^L
0V
1.5V
+3V
RE
0V
5V
R
V_IL
V_IH
R
0V
f = 1MHz; t_R < 1ns; t_F < 1ns
1.5V
t_ZL
1.5V
Output normally LOW
1.5V
t_ZH
Output normally HIGH
1.5V
t_LZ
0.5V
0.5V
t_HZ
Figure 8. Receiver Enable and Disable Times
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com

SP1481E-1485E_100_061609