SP3485EN-L Exar Corporation, SP3485EN-L Datasheet - Page 6

• 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 8. Driver Propagation Delay Waveforms
NOTE 1: The input pulse is supplied by a generator with the following characteristics:
PRR=250KHz, 50% duty cycle, t
NOTE 2: C
10/15/02
Figure 10. Driver Enable and Disable Timing Waveforms
Figure 12. Receiver Enable and Disable Waveforms
OUTPUT
OUTPUT
OUTPUT
RE
HIGH
Y OUTPUT
Z OUTPUT
LOW
DE
INPUT
V
0V
3V
0V
L
V
V
0V
V
OH
0V
V
V
3V
V
V
3V
0V
OH
CC
OL
OH
OH
includes probe and stray capacitance.
OL
OL
V
V
OM
OM
= V
= V
1.5V
1.5V
S1 is open
S2 is closed
S3 = 1.5V
1.5V
t
t
t
t
PHL
PLH
PZH
PZL
OH
OH
10%
2
+ V
V
V
2
t
+ V
OM
PRHZ
OM
V
V
OL
OM
OM
OL
≈ 1.5V
≈ 1.5V
1.5V
t
t
SP3481/3485 Low Power Half-Duplex RS485 Transceivers
PLH
PHL
t
t
r
1.5V
PHZ
PLZ
t
t
1.5V
< 6.0ns, Z
PRZH
PRSH
V
V
OM
OM
0.25V
0.25V
1.5V
0
=50Ω.
6
OUTPUT
RE
Figure 9. Driver Differential Output Delay and Transition
Time Waveforms
Figure 11. Receiver Propagation Delay Waveforms
OUTPUT
OUT
IN
INPUT
V
V
0V
3V
CC
OL
t
TD
10%
50%
V
t
3V
0V
0V
DO1
CC
1.5V
S1 is closed
S2 is open
S3 = -1.5V
1.5V
90%
10%
t
1.5V
PRLZ
t
V
RPLH
OM
1.5V
© Copyright 2000 Sipex Corporation
= V
90%
V
OM
2
CC
t
t
t
1.5V
DO2
PRZL
PRSL
50%
10%
1.5V
1.5V
t
RPHL
t
TD
V
OM
0V
3V
2.0V
-2.0V