SP3490EN 查看數據表（PDF） - Exar Corporation
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SP3490EN Datasheet PDF : 12 Pages
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Switching Waveforms
3V
INPUT
0V
VOH
Y OUTPUT
VOL
1.5V
tPLH
VOM
1.5V
tPHL
VOM
VOH
Z OUTPUT
VOL
tPHL
VOM
tPLH
VOM
VOM =
VOH + VOL
2
≈ 1.5V
Figure 9: Driver Propagation Delay Waveforms
3V
DE
0V
VOH
OUTPUT
HIGH
0V
VCC
OUTPUT
LOW
VOL
1.5V
tPZH
VOM
1.5V
tPHZ
0.25V
tPZL
VOM
tPLZ
0.25V
VOM =
VOH + VOL
2
≈ 1.5V
Figure 11: Driver Enable and Disable Timing Waveforms
SP3490 / SP3491
IN
1.5V
tDO1
OUT
50%
10%
90%
tTD
1.5V
tDO2
90%
50%
10%
tTD
3V
0V
2.0V
-2.0V
Figure 10: Driver Differential Output Delay and
Transition Time Waveforms
3V
INPUT
0V
VCC
OUTPUT
0V
1.5V
1.5V
tRPLH
VOM
tRPHL
VOM
VOM =
VCC
2
Figure 12: Receiver Propagation Delay Waveforms
3V
REB
0V
VOH
OUTPUT
0V
S1 is open
S2 is closed
S3 = 1.5V
1.5V
1.5V
tPRHZ
10%
tPRZH
tPRSH
1.5V
3V
REB
0V
VCC
OUTPUT
VOL
S1 is closed
S2 is open
S3 = -1.5V
1.5V
tPRLZ
10%
Figure 13: Receiver Enable and Disable Waveforms
NOTES
1. The input pulse is supplied by a generator with the following characteristics:
PRR = 250kHz, 50% duty cycle, tR < 6.0ns, ZO = 50Ω.
2. CL includes probe and stray capacitance.
1.5V
tPRZL
tPRSL
1.5V
REV 1.0.3
8/12
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