adm2481 Analog Devices, Inc., adm2481 Datasheet - Page 12

• Manufacturer Part Number: adm2481
• Description: Half-duplex, Icoupler Isolated Rs-485 Transceiver Adm2481
• Manufacturer: Analog Devices, Inc.

ADM2481
SWITCHING CHARACTERISTICS
V
A – B
A, B
V
V
DD1
RxD
0V
OH
OL
B
A
V
OD
10% POINT
1/2V
Figure 22. Driver Propagation Delay, Rise/Fall Timing
90% POINT
OD
t
PLH
0V
Figure 23. Receiver Propagation Delay
0.5V
t
R
DD1
1.5V
t
PLH
t
t
SKEW
SKEW
= |
= |
t
t
PLH
PLH
–
–
t
t
PHL
0.5V
PHL
|
DD1
|
t
0V
PHL
t
PHL
1.5V
90% POINT
t
F
10% POINT
V
V
OH
OL
Rev. 0 | Page 12 of 20
A, B
A, B
RxD
RxD
DE
RE
0V
0.5V
t
t
ZL
ZH
0.5V
t
t
ZH
ZL
DD1
Figure 25. Receiver Enable/Disable Timing
Figure 24. Driver Enable/Disable Timing
DD1
2.3V
2.3V
1.5V
1.5V
OUTPUT HIGH
OUTPUT LOW
t
t
LZ
HZ
0.5V
t
DD1
t
V
V
HZ
0.5V
LZ
OL
OH
+ 0.5V
– 0.5V
DD1
V
V
OL
OH
+ 0.5V
– 0.5V
0.7V
0.3V
0.7V
0.3V
DD1
DD1
DD1
DD1
V
V
0V
V
V
OL
OH
OL
OH