SP3493CN SIPEX [Sipex Corporation], SP3493CN Datasheet - Page 7

• Manufacturer Part Number: SP3493CN
• Description: +3.3V Low Power Slew Rate Limited RS-485/RS-422 Transceivers
• Manufacturer: SIPEX [Sipex Corporation]

10/16/02
Figure 1. Driver DC Test Load Circuit
Figure 7. Receiver Enable and Disable Timing Circuit
Table 1. Transmit Function Truth Table
Figure 3. Driver Differential Output Delay and
Transition Time Circuit
Figure 5. Driver Enable and Disable Timing Circuit,
Output LOW
RE
-1.5V
1.5V
GENERATOR
X
X
X
(NOTE 1)
V
INPUTS
CC
GENERATOR
S3
GENERATOR
DE
(NOTE 1)
(NOTE 1)
1
1
0
0V OR 3V
V
D
ID
50Ω
SP3493/3494 +3.3V Low Power Slew-Rate Limited RS-485/RS-422 Transceivers
DI CONDITION
50Ω
R
X
1
0
50Ω
V
D
D
CC
No Fault
No Fault
C
C
(NOTE 2)
(NOTE 2)
LINE
L
L
= 15pF
V
= 50pF
S1
OD
C
X
L
1k
C
L
= 15pF (NOTE 2)
V
CC
OUTPUTS
R
60Ω
R
R
S1
S2
R
L
L
=
OUT
= 110Ω
B
Z
0
1
OUT
V
OC
A
Z
V
1
0
CC
7
Figure 2. Driver Propagation Delay Test Circuit
Table 2. Receive Function Truth Table
Figure 4. Driver Enable and Disable Timing Circuit,
output HiGH
Figure 6. Receiver Propagation Delay Test Circuit
GENERATOR
RE
(NOTE 1)
0
0
0
1
GENERATOR
INPUTS
(NOTE 1)
GENERATOR
(NOTE 1)
1.5V
0V
DE
0
0
0
0
50Ω
50Ω
50Ω
D
V
Inputs Open
D
CC
© Copyright 2002 Sipex Corporation
V
C
V
(NOTE 2)
OM
L
OM
V
= 50pF
+0.2V
=
A - B
ID
-0.2V
S1
=
V
X
OH
V
S1
OH
+ V
2
R
+ V
2
OL
OL
1.5V
1.5V
OUTPUTS
V
C
OUT
DM
(NOTE 2)
L
V
= 15pF
OM
R
L
= 27Ω
R
= V
OUT
C
L
R
Z
(NOTE 2)
1
0
1
OUT
L
2
= 110Ω
CC
= 15pF