LTC1334
U
W
SWITCHI G WAVEFOR S
3V
DE
0V
5V
Y, Z
VOL
VOH
Z, Y
0V
VOD2
B–A
–VOD2
VOH
R
VOL
3V
D
0V
VO
Y, Z
–VO
VIH
A, B
VIL
VOH
R
VOL
1.5V
f = 1MHz: tr ≤ 10ns: tf ≤ 10ns
1.5V
tZL
tLZ
2.3V
OUTPUT NORMALLY LOW
0.5V
tZH
tHZ
OUTPUT NORMALLY HIGH
0.5V
2.3V
Figure 7. RS485 Driver Enable and Disable Times
LTC1334 • F07
0V f = 1MHz: tr ≤ 10ns: tf ≤ 10ns INPUT
0V
tPLH
1.5V
OUTPUT
tPHL
1.5V
Figure 8. RS485 Receiver Propagation Delays
LTC1334 • F08
1.5V
tPHL
0V
1.5V
tPLH
0V
Figure 9. RS232 Driver Propagation Delays
LTC1334 • F09
1.3V
tPHL
0.8V
1.7V
tPLH
2.4V
LTC1334 • F10
Figure 10. RS232 Receiver Propagation Delays
10