3.3V-Powered, 10Mbps and Slew-Rate-Limited
True RS-485/RS-422 Transceivers
MAX3483/MAX3485/MAX3486/MAX3488/MAX3490/MAX3491
B
1V/div
DI
2V/div
Z
1V/div
A
1V/div
Y
1V/div
20ns/div
RO
2V/div
20ns/div
Figure 15. MAX3485/MAX3490/MAX3491 Driver Propagation
Delay
Figure 16. MAX3485/MAX3490/MAX3491 Receiver
Propagation Delay Driven by External RS-485 Device
B
1V/div
DI
2V/div
Z
1V/div
Y
1V/div
1µs/div
A
1V/div
RO
2V/div
1µs/div
Figure 17. MAX3483/MAX3488 Driver Propagation Delay
Figure 18. MAX3483/MAX3488 Receiver Propagation Delay
DI
5V/div
V
Y
- V
Z
2V/div
DI
5V/div
V
Y
- V
Z
2V/div
RO
5V/div
RO
5V/div
2µs/div
2µs/div
Figure 19. MAX3483/MAX3488 System Differential Voltage at
125kHz Driving 4000 ft of Cable
Figure 20. MAX3485/MAX3490/MAX3491 System Differential
Voltage at 125kHz Driving 4000 ft of Cable
12
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MAXIM [ MAXIM INTEGRATED PRODUCTS ]
