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SP485E Scheda tecnica(PDF) 5 Page - Sipex Corporation

Il numero della parte SP485E
Spiegazioni elettronici  Enhanced Low Power Half-Duplex RS-485 Transceivers
PDF  11 Pages
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Produttore elettronici  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP485E Scheda tecnica(HTML) 5 Page - Sipex Corporation

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5
May11-2007
SP481E Low Power Half-Duplex RS485 Transceivers
© 2007 Sipex Corporation
INPUTS
OUTPUTS
LINE
RE
DE
DI CONDITION
B
A
X
1
1
No Fault
0
1
X
1
0
No Fault
1
0
X
0
X
X
Z
Z
X
1
X
Fault
Z
Z
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 1. Transmit Function Truth Table
Table 2. Receive Function Truth Table
+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
+3V
0V
RE
5V
R
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
Figure 8. Receiver Enable and Disable Times
Figure 7. Receiver Propagation Delays
Figure 6. Driver Enable and Disable Times
VOH
VOL
R
1.5V
1.5V
tPHL
f = 1MHz; tR < 10ns; tF < 10ns
OUTPUT
V0D2+
V0D2–
A – B
0V
0V
tPLH
INPUT
tSKEW = | tPHL - tPLH |



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