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SP481ECP-L 数据表(PDF) 6 Page - Exar Corporation

部件名 SP481ECP-L
功能描述  Enhanced Low Power Half-Duplex RS-485 Transceivers
PDF  12 Pages
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制造商  EXAR [Exar Corporation]
网页  http://www.exar.com
标志 EXAR - Exar Corporation

SP481ECP-L 数据表(HTML) 6 Page - Exar Corporation

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Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 50-668-707 • www.exar.com
SP48E,485E_00_2808
Figure 6. Driver Enable and Disable Times
Figure 8. Receiver Enable and Disable Times
+3V
0V
DE
5V
VOL
A,B
0V
1.5V
1.5V
tZL
tZH
f = 1MHz; tR < 10ns; tF < 10ns
VOH
A,B
2.3V
2.3V
tLZ
tHZ
0.5V
0.5V
Output normally LOW
Output normally HIGH
SWITCHING WAVEFORMS
FUNCTION TRUTH TABLES
INPUTS
OUTPUTS
RE
DE
DI
LINE
CONDITION
A
B
X


No Fault
0

X

0
No Fault

0
X
0
X
X
Z
Z
X

X
Fault
Z
Z
Table 1. Transmit Function Truth Table
INPUTS
OUTPUTS
RE
DE
A - B
R
0
0
+0.2V

0
0
-0.2V
0
0
0
Inputs Open


0
X
Z
Table 2. Receive Function Truth Table
VOH
VOL
R
1.5V
1.5V
tPHL
f = 1MHz; tR 10ns; tF ≤ 10ns
OUTPUT
VOD2+
VOD2–
A – B
0V
0V
tPLH
INPUT
≤
+3V
0V
5V
0V
1.5V
1.5V
tZL
tZH
f = 1MHz; tR ≤ 10ns; tF ≤ 10ns
R
1.5V
1.5V
tLZ
tHZ
0.5V
0.5V
Output normally LOW
Output normally HIGH
VIL
VIH
R
RE
Figure 7. Receiver Propagation Delays



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