Datasheet

4
LTC485
SWITCHI G TI E WAVEFOR S
UW W
DI
3V
1.5V
t
PLH
t
r
t
SKEW
1/2 V
O
V
O
80%
10%
0V
B
A
V
O
–V
O
0V
90%
1.5V
t
PLH
t
SKEW
1/2 V
O
f = 1MHz, t
r
≤ 10ns, t
f
≤ 10ns
20%
t
f
V
DIFF
= V(A) – V(B)
LTC485 • F05
Figure 5. Driver Propagation Delays
1.5V
t
ZL
2.3V
2.3V
t
ZH
1.5V
t
LZ
0.5V
0.5V
t
HZ
f = 1MHz, t
r
≤ 10ns, t
f
≤ 10ns
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
DI
5V
V
OL
V
OH
0V
A, B
A, B
LTC485 • F06
Figure 6. Driver Enable and Disable Times
1.5V
t
PHL
f = 1MHz, t
r
≤ 10ns, t
f
≤ 10ns
R
–V
OD2
A, B
0V
1.5V
t
PLH
OUTPUT
INPUT
V
OD2
V
OL
V
OH
LTC485 • F07
Figure 7. Receiver Propagation Delays
Figure 8. Receiver Enable and Disable Times
1.5V
t
ZL
1.5V
1.5V
t
ZH
1.5V
t
LZ
0.5V
0.5V
t
HZ
f = 1MHz, t
r
≤ 10ns, t
f
≤ 10ns
OUTPUT NORMALLY LOW
OUTPUT NORMALLY HIGH
3V
0V
RE
5V
0V
R
R
LTC485 • F08