Software-Selectable, Half-/Full-Duplex, Slew-Rate-Limited,

12Mbps, RS-485/RS-422 Transceivers in µMAX Package

4

_______________________________________________________________________________________

SWITCHING CHARACTERISTICS (MAX1481/MAX1485) (continued)

Note 1: All currents into the device are positive; all currents out of the device are negative. All voltages are referenced to device

ground unless otherwise noted.

Note 2:

Note 3: Maximum current level applies to peak current just prior to foldback-current limiting; minimum current level applies during

current limiting.

Note 4: Shutdown is enabled by bringing RE high and DE low. If the enable inputs are in this state for less than 50ns, the MAX1481

is guaranteed not to enter shutdown. If the enable inputs are in this state for at least 600ns, the MAX1481 is guaranteed to

have entered shutdown.

Figures 7 and 9

Figures 7 and 9

ns

200

Driver Disable Time from Low

Figures 7 and 9

ns

3000

Driver Enable to Output High

ns

3000

CONDITIONS

Driver Enable to Output Low

kbps

250

Maximum Data Rate

ns

10

200

Driver Output Skew

Figures 11 and 13

ns

ns

20

50

Receiver Enable to Output High

ns

20

50

Receiver Enable to Output Low

ns

200

Driver Disable Time from High

ns

ns

20

50

Receiver Disable Time from High

90

150

Receiver Input to Output

250

1000

Driver Rise or Fall Time

ns

20

50

Receiver Disable Time from Low

Figures 11 and 13

ns

15

Receiver Skew

600

1000

ns

600

1000

Driver Input to Output

UNITS

MIN

TYP

MAX

SYMBOL

PARAMETER

MAX1481 only (Note 4)

ns

50

200

600

Time to Shutdown

Figures 8 and 10

ns

3000

Driver Enable from Shutdown to

Output High

Figures 8 and 10

ns

3000

Driver Enable from Shutdown to

Output Low

Figures 6 and 12

ns

1000

Receiver Enable from Shutdown

to Output Low

Figures 6 and 12

ns

500

Receiver Enable from Shutdown

to Output High