7

FN6046.8

February 28, 2006

Receiver Disable from Output Low

Full

-

10

50

ns

Maximum Data Rate

Note 11

Full

250

-

-

kbps

Time to Shutdown (ISL8483 only)

Note 7

Full

50

200

600

ns

Driver Enable from Shutdown to

Output High (ISL8483 only)

Full

-

-

2000

ns

Driver Enable from Shutdown to

Output Low (ISL8483 only)

Full

-

-

2000

ns

Receiver Enable from Shutdown to

Output High (ISL8483 only)

Full

-

-

2500

ns

Receiver Enable from Shutdown to

Output Low (ISL8483 only)

Full

-

-

2500

ns

NOTES:

2. All currents into device pins are positive; all currents out of device pins are negative. All voltages are referenced to device ground unless

otherwise specified.

3. Supply current specification is valid for loaded drivers when DE = 0V.

4. Applies to peak current. See “Typical Performance Curves” for more information.

5. When testing the ISL8483, keep RE = 0 to prevent the device from entering SHDN.

6. When testing the ISL8483, the RE signal high time must be short enough (typically <200ns) to prevent the device from entering SHDN.

7. The ISL8483 is put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 50ns, the parts are guaranteed not

to enter shutdown. If the inputs are in this state for at least 600ns, the parts are guaranteed to have entered shutdown. See “Low-Power

Shutdown Mode” section.

9. Set the RE signal high time >600ns to ensure that the device enters SHDN.

10. Devices meeting these limits are denoted as “single unit load (1 UL)” transceivers. The RS-485 standard allows up to 32 Unit Loads on the bus.

11. Guaranteed by characterization, but not tested.

Test Circuits and Waveforms

Electrical Specifications

PARAMETER

SYMBOL

TEST CONDITIONS

TEMP

(°C)

MIN

TYP

MAX

UNITS

D

DE

DI

R

R

Z

Y

ISL8483, ISL8485, ISL8488, ISL8489, ISL8490, ISL8491