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SP3481 Datasheet(PDF) 6 Page - Sipex Corporation

Part No. SP3481
Description  3.3V Low Power Half-Duplex RS-485 Transceivers with 10Mbps Data Rate
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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SP3481 Datasheet(HTML) 6 Page - Sipex Corporation

   
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10/15/02
SP3481/3485 Low Power Half-Duplex RS485 Transceivers
© Copyright 2000 Sipex Corporation
6
Figure 8. Driver Propagation Delay Waveforms
Figure 12. Receiver Enable and Disable Waveforms
Figure 11. Receiver Propagation Delay Waveforms
Figure 10. Driver Enable and Disable Timing Waveforms
0V
VOH
tPLH
tPHL
VOM
tPHL
tPLH
3V
VOL
VOH
1.5V
1.5V
INPUT
Y OUTPUT
VOM
Z OUTPUT
VOL
VOM
VOM
VOM = V
OH
+ VOL
2
≈ 1.5V
0V
VOH
tPZH
0.25V
tPHZ
VOM
tPZL
tPLZ
3V
VOL
VCC
1.5V
1.5V
DE
OUTPUT
HIGH
VOM
0.25V
0V
OUTPUT
LOW
VOM = V
OH
+ VOL
2
≈ 1.5V
3V
0V
VCC
tRPLH
1.5V
tRPHL
VOM
VOM
0V
1.5V
INPUT
OUTPUT
VOM = V
CC
2
NOTE 1: The input pulse is supplied by a generator with the following characteristics:
PRR=250KHz, 50% duty cycle, t
r < 6.0ns, Z0=50Ω.
NOTE 2: C
L includes probe and stray capacitance.
IN
1.5V
tDO1
1.5V
tDO2
3V
0V
OUT
50%
50%
10%
10%
90%
90%
tTD
tTD
2.0V
-2.0V
Figure 9. Driver Differential Output Delay and Transition
Time Waveforms
3V
0V
tPRHZ
1.5V
tPRZH
tPRSH
1.5V
1.5V
10%
0V
VOH
RE
OUTPUT
S1 is open
S2 is closed
S3 = 1.5V
3V
0V
tPRLZ
1.5V
tPRZL
tPRSL
1.5V
1.5V
10%
VCC
RE
OUTPUT
S1 is closed
S2 is open
S3 = -1.5V
VOL


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