ISL4485E datasheet(4/11 Pages) INTERSIL

Il numero della parte	ISL4485E

Spiegazioni elettronici	짹15kV ESD Protected, 20Mbps, 5V, Low Power, RS-485/RS-422 Transceiver

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Produttore elettronici	INTERSIL [Intersil Corporation]

Homepage	http://www.intersil.com/cda/home

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SWITCHING CHARACTERISTICS

Driver Input to Output Delay

tPLH, tPHL RDIFF = 54Ω, CL = 100pF, (Figure 2)

Full

15

30

50

ns

Driver Output Skew

tSKEW

RDIFF = 54Ω, CL = 100pF, (Figure 2)

Full

-

1.3

5

ns

Driver Differential Rise or Fall Time

tR, tF

RDIFF = 54Ω, CL = 100pF, (Figure 2)

Full

3

11

25

ns

Driver Enable to Output High

tZH

CL = 100pF, SW = GND, (Figure 3)

Full

-

17

30

ns

Driver Enable to Output Low

tZL

CL = 100pF, SW = VCC, (Figure 3)

Full

-

14

30

ns

Driver Disable from Output High

tHZ

CL = 15pF, SW = GND, (Figure 3)

Full

-

19

30

ns

Driver Disable from Output Low

tLZ

CL = 15pF, SW = VCC, (Figure 3)

Full

-

13

30

ns

Driver Maximum Data Rate

fMAXD

VOD ≥ 1.5V , (Figure 4, Note 6)

Full

20

-

Mbps

Receiver Input to Output Delay

tPLH, tPHL Figure 5

Full

20

40

70

ns

Receiver Skew | tPLH - tPHL |tSKD

Figure 5

Full

-

3

10

ns

Receiver Enable to Output High

tZH

CL = 15pF, SW = GND, (Figure 6)

Full

-

9

25

ns

Receiver Enable to Output Low

tZL

CL = 15pF, SW = VCC, (Figure 6)

Full

-

9

25

ns

Receiver Disable from Output High

tHZ

CL = 15pF, SW = GND, (Figure 6)

Full

-

9

25

ns

Receiver Disable from Output Low

tLZ

CL = 15pF, SW = VCC, (Figure 6)

Full

-

9

25

ns

Receiver Maximum Data Rate

fMAXR

CL = 15pF, VID ≥ 1.5V (Note 6)

Full

20

-

Mbps

ESD PERFORMANCE

RS-485 Pins (A/Y, B/Z)

Human Body Model

25

-

±15

-

kV

All Other Pins

25

-

>

±7-

kV

NOTE:

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. 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.

6. Guaranteed by characterization, but not tested.

Test Circuits and Waveforms

FIGURE 1. DRIVER VOD AND VOC

Electrical Specifications

Test Conditions: VCC = 4.5V to 5.5V; Unless Otherwise Specified.

Typicals are at VCC = 5V, TA = 25

oC, Note 2 (Continued)

PARAMETER

SYMBOL

TEST CONDITIONS

TEMP

(oC)

MIN

TYP

MAX

UNITS

D

DE

DI

VCC

VOD

VOC

R

Z

Y

ISL4485E

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