SP1485E 데이터 시트보기 (PDF) - Exar Corporation
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SP1485E Datasheet PDF : 10 Pages
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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
VOL
VOH
A, B
0V
f = 1MHz; f= tR < 1ns; tF < 1ns
1.5V
tZL
2.3V
Output normally LOW
2.3V
tZH
Output normally HIGH
Figure 6. Driver Enable and Disable Times
1.5V
tLZ
0.5V
0.5V
tHZ
V0D2+
A – B V0D2–
0V
INPUT
VOH
R
VOL
tPHL
Figure 7. Receiver Propagation Delays
1.5V
OUTPUT
f = 1MHz; tR < 1ns; tF < 1tPnHsL
0V
1.5V
+3V
RE
0V
5V
R
VIL
VIH
R
0V
f = 1MHz; tR < 1ns; tF < 1ns
1.5V
tZL
1.5V
Output normally LOW
1.5V
tZH
Output normally HIGH
1.5V
tLZ
0.5V
0.5V
tHZ
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
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