ISL32483E, ISL32485E

7

FN7785.0

January 18, 2011

Driver Disable from Output

High

SW = GND (Figure 5)

Full

-

-

120

ns

Time to Shutdown

(Notes 11, 16)

Full

60

160

600

ns

Driver Enable from Shutdown

to Output High

(Notes 11, 12, 16)

Full

-

-

2000

ns

Driver Enable from Shutdown

to Output Low

(Notes 11, 12, 16)

Full

-

-

2000

ns

RECEIVER SWITCHING CHARACTERISTICS

Maximum Data Rate

Full

1

15

-

Mbps

Receiver Input to Output Delay

Full

-

90

150

ns

(Figure 7)

Full

-

4

10

ns

Receiver Enable to Output

Low

(Notes 10, 16)

Full

-

-

50

ns

Receiver Enable to Output

High

(Notes 10, 16)

Full

-

-

50

ns

Receiver Disable from Output

Low

(Note 16)

Full

-

-

50

ns

Receiver Disable from Output

High

(Note 16)

Full

-

-

50

ns

Time to Shutdown

(Notes 11, 16)

Full

60

160

600

ns

Receiver Enable from

Shutdown to Output High

(Notes 11, 13, 16)

Full

-

-

2000

ns

Receiver Enable from

Shutdown to Output Low

(Notes 11, 13, 16)

Full

-

-

2000

ns

NOTES:

6. 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.

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

8. Applies to peak current. See “Typical Performance Curves” beginning on page 18 for more information

9. Keep RE = 0 to prevent the device from entering SHDN.

10. The RE signal high time must be short enough (typically <100ns) to prevent the device from entering SHDN.

11. Transceivers (except on the ISL32485E) are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 60ns, 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” on page 12.

12. Keep RE = VCC, and set the DE signal low time >600ns to ensure that the device enters SHDN.

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

14. Compliance to data sheet limits is assured by one or more methods: production test, characterization and/or design.

15. Tested according to TIA/EIA-485-A, Section 4.2.6 (±80V for 15ms at a 1% duty cycle).

16. Does not apply to the ISL32485E. The ISL32485E has no Rx enable function, and thus no SHDN function.

17. See “Caution” statement in the “Recommended Operating Conditions” section on page 5.

Boldface limits apply over the operating temperature range, -40°C to +85°C.

(Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

TEMP

(°C)

MIN

(Note 14)

TYP

MAX

(Note 14)

UNITS