ISL83490 datasheet(7/17 Pages) INTERSIL

Part #	ISL83490

Description	3.3V, Low Power, High Speed or Slew Rate Limited, RS-485/RS-422 Transceivers

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Manufacturer	INTERSIL [Intersil Corporation]

Direct Link	http://www.intersil.com/cda/home

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7 / 17 page

7

Driver Disable from Output Low

(Except ISL83488)

tLZ

RL = 110Ω, CL = 50pF, SW = VCC (Figure 3)

25

-

70

80

ns

Full

-

110

ns

Driver Enable from Shutdown to

Output High (Except ISL83488)

tZH(SHDN) RL = 110Ω, CL = 50pF, SW = GND (Notes 7, 8)

Full

-

450

2000

ns

Driver Enable from Shutdown to

Output Low (Except ISL83488)

tZL(SHDN) RL = 110Ω, CL = 50pF, SW = VCC (Figure 3),

(Notes 7, 8)

Full

-

126

2000

ns

RECEIVER SWITCHING CHARACTERISTICS (All Versions)

Receiver Input to Output Delay

tPLH, tPHL (Figure 4)

Full

25

45

90

ns

Receiver Skew | tPLH - tPHL |tSKD

(Figure 4)

25

-

2

10

ns

Full

-

2

12

ns

Receiver Enable to Output High

(Except ISL83488 and ISL83490)

tZH

RL = 1kΩ, CL = 15pF, SW = GND (Figure 5),

(Note 6)

Full

-

11

50

ns

Receiver Enable to Output Low

(Except ISL83488 and ISL83490)

tZL

RL = 1kΩ, CL = 15pF, SW = VCC (Figure 5),

(Note 6)

Full

-

11

50

ns

Receiver Disable from Output High

(Except ISL83488 and ISL83490)

tHZ

RL = 1kΩ, CL = 15pF, SW = GND (Figure 5)

Full

-

7

45

ns

Receiver Disable from Output Low

(Except ISL83488 and ISL83490)

tLZ

RL = 1kΩ, CL = 15pF, SW = VCC (Figure 5)

Full

-

7

45

ns

Time to Shutdown

(Except ISL83488 and ISL83490)

tSHDN

(Note 7)

Full

80

190

300

ns

Receiver Enable from Shutdown to

Output High

(Except ISL83488 and ISL83490)

tZH(SHDN) RL = 1kΩ, CL = 15pF, SW = GND (Figure 5),

(Notes 7, 9)

Full

-

240

600

ns

Receiver Enable from Shutdown to

Output Low

(Except ISL83488 and ISL83490)

tZL(SHDN) RL = 1kΩ, CL = 15pF, SW = VCC (Figure 5),

(Notes 7, 9)

Full

-

240

600

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 ISL83483, ISL83485, ISL83491, keep RE = 0 to prevent the device from entering SHDN.

6. When testing the ISL83483, ISL83485, ISL83491, the RE signal high time must be short enough (typically <100ns) to prevent the device from

entering SHDN.

7. The ISL83483, ISL83485, ISL83491 are put into shutdown by bringing RE high and DE low. If the inputs are in this state for less than 80ns, the

parts are guaranteed not to enter shutdown. If the inputs are in this state for at least 300ns, the parts are guaranteed to have entered shutdown.

See “Low-Power Shutdown Mode” section.

8. Keep RE = VCC, and set the DE signal low time >300ns to ensure that the device enters SHDN.

9. Set the RE signal high time >300ns to ensure that the device enters SHDN.

Electrical Specifications

Test Conditions: VCC = 3V to 3.6V; Unless Otherwise Specified. Typicals are at VCC = 3.3V, TA = 25oC,

Note 2 (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

TEMP

(oC)

MIN

TYP

MAX

UNITS

ISL83483, ISL83485, ISL83488, ISL83490, ISL83491

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