SP3485EN-L Exar Corporation, SP3485EN-L Datasheet - Page 5

• Manufacturer Part Number: SP3485EN-L
• Description: IC TXRX RS485 HALF DUPLEX 8NSOIC
• Manufacturer: Exar Corporation
• Type: Transceiverr

Specifications of SP3485EN-L

• Package / Case: 8-SOIC (0.154", 3.90mm Width)
• Number Of Drivers/receivers: 1/1
• Protocol: RS485
• Voltage - Supply: 3.3V
• Mounting Type: Surface Mount
• Operating Supply Voltage: 3.3 V
• Supply Current: 800 uA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 1016-1145-5

Figure 1. Driver DC Test Load Circuit
Figure 7. Receiver Enable and Disable Timing Circuit
Table 1. Transmit Function Truth Table
10/15/02
Figure 5. Driver Enable and Disable Timing Circuit,
Output LOW
Figure 3. Driver Differential Output Delay and Transition
Time Circuit
RE
-1.5V
1.5V
GENERATOR
X
X
X
(NOTE 1)
V
INPUTS
CC
GENERATOR
S3
GENERATOR
(NOTE 1)
DE
(NOTE 1)
1
1
0
0V OR 3V
V
D
ID
50Ω
DI CONDITION
R
50Ω
X
1
0
50Ω
V
D
D
CC
No Fault
No Fault
C
C
(NOTE 2)
(NOTE 2)
LINE
L
L
= 15pF
= 50pF
V
S1
OD
C
X
L
1k
C
L
SP3481/3485 Low Power Half-Duplex RS485 Transceivers
= 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
5
Figure 2. Driver Propagation Delay Test Circuit
Figure 4. Driver Enable and Disable Timing Circuit,
Output HIGH
Figure 6. Receiver Propagation Delay Test Circuit
Table 2. Receive Function Truth Table
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
V
C
V
(NOTE 2)
OM
L
OM
© Copyright 2002 Sipex Corporation
= 50pF
V
=
A - B
+0.2V
S1
ID
-0.2V
=
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
L
C
R
Z
1
0
1
(NOTE 2)
OUT
L
2
= 110Ω
CC
= 15pF