adm2486 Analog Devices, Inc., adm2486 Datasheet - Page 11

• Manufacturer Part Number: adm2486
• Description: High Speed, Half-duplex Icoupler Isolated Rs-485 Transceiver
• Manufacturer: Analog Devices, Inc.

SWITCHING CHARACTERISTICS
V
A, B
V
V
DD1
A – B
0V
OH
OL
RxD
B
A
VO
10% POINT
1/2VO
Figure 12. Driver Propagation Delay, Rise/Fall Timing
90% POINT
t
PHL
0V
Figure 13. Receiver Propagation Delay
0.5V
t
R
DD1
1.5V
t
PBLH
t
t
PALH
SKEW
t
PWD
t
SKEW
= |t
PALH
= |t
– t
PLH
PAHL
– t
0.5V
|, |t
PHL
DD1
PBLH
t
PHL
|
0V
– t
t
PBHL
PBHL
1.5V
90% POINT
|
t
F
10% POINT
t
t
PAHL
SKEW
Rev. D | Page 11 of 20
V
V
OL
OH
RTS
A, B
A, B
RE
RxD
RxD
0V
Figure 15. Receiver Enable/Disable Timing
t
t
Figure 14. Driver Enable/Disable Timing
0.5V
ZH
ZL
t
t
0.5V
ZL
ZH
DD1
DD1
2.3V
2.3V
1.5V
1.5V
O/P LOW
O/P HIGH
t
t
LZ
HZ
t
t
LZ
HZ
0.5V
0.5V
V
V
DD1
OH
OH
DD1
V
ADM2486
V
OH
OH
– 0.5V
+ 0.5V
– 0.5V
+ 0.5V
0.7V
0.3V
0.7V
0.3V
DD1
DD1
V
DD1
DD1
V
V
V
OH
OH
OL
OL
0V