ISL83485 datasheet(11/17 Pages) INTERSIL

Part #	ISL83485

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

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Manufacturer	INTERSIL [Intersil Corporation]

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11

Low Power Shutdown Mode (ISL83483, ISL83485,

ISL83491 Only)

These CMOS transceivers all use a fraction of the power

required by their bipolar counterparts, but the ISL83483,

ISL83485, ISL83491 include a shutdown feature that

reduces the already low quiescent ICC to a 15nA trickle.

They enter shutdown whenever the receiver and driver are

simultaneously disabled (RE =VCC and DE = GND) for a

period of at least 300ns. Disabling both the driver and the

receiver for less than 80ns guarantees that shutdown is not

entered.

Note that receiver and driver enable times increase when

these devices enable from shutdown. Refer to Notes 5-9, at

the end of the Electrical Specification table, for more

information.

Typical Performance Curves VCC = 3.3V, TA = 25oC, ISL83483 thru ISL83491; Unless Otherwise Specified

FIGURE 6. DRIVER OUTPUT CURRENT vs DIFFERENTIAL

OUTPUT VOLTAGE

FIGURE 7. DRIVER DIFFERENTIAL OUTPUT VOLTAGE vs

TEMPERATURE

FIGURE 8. DRIVER OUTPUT CURRENT vs SHORT CIRCUIT

VOLTAGE

FIGURE 9. SUPPLY CURRENT vs TEMPERATURE

DIFFERENTIAL OUTPUT VOLTAGE (V)

00.5

11.5

2

2.5

33.5

0

10

20

30

40

50

60

70

80

90

100

110

2

2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

-40

0

50

85

TEMPERATURE (oC)

-25

25

75

RDIFF = 54Ω

RDIFF = 100Ω

OUTPUT VOLTAGE (V)

-7 -6

-4

-2

0

2

4

6

8

10

12

-60

-40

-20

0

20

40

60

80

100

120

140

160

-80

-100

-120

Y OR Z = HIGH

Y OR Z = LOW

-40

0

50

85

TEMPERATURE (oC)

-25

25

75

ISL83483/85, DE = VCC, RE = X

ISL83483/85, DE = RE = GND; ISL83491, DE = X, RE = GND;

ISL83488/90

600

650

700

750

800

ISL83483, ISL83485, ISL83488, ISL83490, ISL83491

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