sp483eep Exar Corporation, sp483eep Datasheet - Page 5

• Manufacturer Part Number: sp483eep
• Description: Enhanced Low Emi Half-duplex Rs-485 Transceiver
• Manufacturer: Exar Corporation

Table 1. Transmit Function Truth Table
Figure 8. Receiver Enable and Disable Times
SP483EDS/05
Figure 6. Driver Enable and Disable Times
Figure 7. Receiver Propagation Delays
RE
X
X
X
X
INPUTS
RE
A, B
A, B
R
R
DE
DE
1
1
0
1
+3V
V
V
0V
5V
0V
V
IH
+3V
V
IL
DI CONDITION
0V
5V
0V
OH
X
X
OL
1
0
A – B
t
SKEW =
R
V
V
No Fault
No Fault
0D2
0D2
V
V
LINE
| t
Fault
OH
OL
PHL -
+
X
–
t
PLH
t
PHL
1.5V
|
1.5V
1.5V
1.5V
OUTPUTS
2.3V
2.3V
SP483E Low EMI Half-Duplex RS485 Transceiver
f = 100kHz; t
B
f = 100kHz; t
0
1
Z
Z
t
t
ZH
t
ZL
t
ZH
ZL
0V
1.5V
f = 100kHz; t
A
Z
Z
Output normally HIGH
1
0
Output normally LOW
Output normally HIGH
Output normally LOW
R
5
R
< 10ns; t
Table 2. Receive Function Truth Table
OUTPUT
< 10ns; t
R
INPUT
< 10ns; t
RE
0
0
0
1
INPUTS
F
< 10ns
F
F
< 10ns
< 10ns
t
PLH
DE
0
0
0
0
Inputs Open
0V
1.5V
1.5V
© Copyright 2000 Sipex Corporation
0.5V
0.5V
A - B
+0.2V
0.5V
0.5V
-0.2V
1.5V
X
t
t
HZ
LZ
t
t
HZ
LZ
OUTPUTS
R
Z
1
0
1