LTC485CJ8 データシートの表示（PDF） - Linear Technology
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LTC485CJ8 Datasheet PDF : 12 Pages
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LTC485
UW
W
SWITCHI G TI E WAVEFOR S
3V
DI
0V
5V
A, B
VOL
VOH
A, B
0V
1.5V
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
1.5V
t ZL
t LZ
2.3V
OUTPUT NORMALLY LOW
0.5V
2.3V
OUTPUT NORMALLY HIGH
0.5V
t ZH
t HZ
Figure 6. Driver Enable and Disable Times
VOH
R
VOL
VOD2
A, B
– VOD2
1.5V
OUTPUT
1.5V
t PHL
f = 1MHz, tr ≤ 10ns, tf ≤ 10ns tPLH
0V
INPUT
Figure 7. Receiver Propagation Delays
3V
RE
0V
5V
R
R
0V
1.5V f = 1MHz, tr ≤ 10ns, tf ≤ 10ns
t ZL
t LZ
1.5V
OUTPUT NORMALLY LOW
1.5V
0.5V
1.5V
OUTPUT NORMALLY HIGH
0.5V
t ZH
t HZ
Figure 8. Receiver Enable and Disable Times
LTC485 • F06
LTC485 • F07
LTC485 • F08
UU
FU CTIO TABLES
LTC485 Transmitting
INPUTS
RE
DE
DI
X
1
1
X
1
0
X
0
X
X
1
X
LINE
CONDITION
No Fault
No Fault
X
Fault
OUTPUTS
B
A
0
1
1
0
Z
Z
Z
Z
6
LTC485 Receiving
INPUTS
RE
DE
0
0
0
0
0
0
1
0
A–B
≥ 0.2V
≤ – 0.2V
Inputs Open
X
OUTPUTS
R
1
0
1
Z
sn485 LTC485ffs
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