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SP1485ECP датащи(PDF) 5 Page - Sipex Corporation

номер детали SP1485ECP
подробное описание детали  Enhanced Low Power Half-Duplex RS-485 Transceivers
PDF  11 Pages
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производитель  SIPEX [Sipex Corporation]
домашняя страница  http://www.sipex.com
Logo SIPEX - Sipex Corporation

SP1485ECP датащи(HTML) 5 Page - Sipex Corporation

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5
Rev:C Date: 02/26/04
SP1485E Low Power Half-Duplex RS485 Transceivers
© Copyright 2004 Sipex Corporation
INPUTS
OUTPUTS
LINE
RE
DE
DI CONDITION
B
A
X1
1
No Fault
0
1
X1
0
No Fault
1
0
X0
X
X
ZZ
X1
X
Fault
Z
Z
INPUTS
OUTPUTS
RE
DE
A - B
R
00
+0.2V
1
00
-0.2V
0
00
Inputs Open
1
10
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 < 1.0ns; tF < 1.0ns
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 < 1.0ns; tF < 1.0ns
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 < 1.0ns; tF < 1.0ns
OUTPUT
V0D2+
V0D2–
A – B
0V
0V
tPLH
INPUT
tSKEW = | tPHL - tPLH |



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