3.3V-Powered, 10Mbps and Slew-Rate-Limited

True RS-485/RS-422 Transceivers

12

______________________________________________________________________________________

B

1V/div

A

1V/div

RO

2V/div

20ns/div

DI

5V/div

2V/div

RO

5V/div

2

µs/div

B

1V/div

A

1V/div

RO

2V/div

1

µs/div

DI

2V/div

20ns/div

Z

1V/div

Y

1V/div

DI

2V/div

Z

1V/div

Y

1V/div

1

µs/div

DI

5V/div

2V/div

RO

5V/div

2

µs/div

Figure 15. MAX3485/MAX3490/MAX3491 Driver Propagation

Delay

Figure 17. MAX3483/MAX3488 Driver Propagation Delay

Figure 16. MAX3485/MAX3490/MAX3491 Receiver

Propagation Delay Driven by External RS-485 Device

Figure 18. MAX3483/MAX3488 Receiver Propagation Delay

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