ISL31470E, ISL31472E, ISL31475E, ISL31478E

9

FN7639.0

June 17, 2010

(Figure 5)

Full

-

4

10

ns

Receiver Enable to Output Low

(Figure 6), (Note 12)

Full

-

-

50

ns

Receiver Enable to Output High

(Figure 6), (Note 12)

Full

-

-

50

ns

Receiver Disable from Output

Low

(Figure 6)

Full

-

-

50

ns

Receiver Disable from Output

High

(Figure 6)

Full

-

-

50

ns

Time to Shutdown

(Note 13)

Full

60

160

600

ns

Receiver Enable from

Shutdown to Output High

(Figure 6), (Notes 13, 15)

Full

-

-

2000

ns

Receiver Enable from

Shutdown to Output Low

(Figure 6), (Notes 13, 15)

Full

-

-

2000

ns

NOTES:

8. 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.

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

10. Applies to peak current. See “Typical Performance Curves” beginning on page 14 for more information.

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

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

13. Transceivers 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 14.

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

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

16. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established

by characterization and are not production tested.

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

18. See “Caution” statement below the “Recommended Operating Conditions” section on page 5.

Test Circuits and Waveforms

FIGURE 1. DC DRIVER TEST CIRCUITS

-40°C to +85°C. (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

TEMP

(°C)

MIN

(Note 16) TYP

MAX

(Note 16) UNITS

D

DE

DI

Z

Y

D

DE

DI

375Ω

375Ω

Z

Y