MAX253MJA datasheet(3/16 Pages) MAXIM

Part #	MAX253MJA

Description	Transformer Driver for Isolated RS-485 Interface

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Manufacturer	MAXIM [Maxim Integrated Products]

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Transformer Driver for

Isolated RS-485 Interface

_______________________________________________________________________________________

3

10.5

6.0

-60

-20

60

140

OUTPUT RESISTANCE vs. TEMPERATURE

(FS = LOW)

7.0

9.5

TEMPERATURE (°C)

20

100

8.5

8.0

6.5

7.5

10.0

9.0

-40

0

80

40

120

VIN = 4.5V

VIN = 5.0V

MEASURED AT TP1

15

6

-60

-20

60

140

OUTPUT RESISTANCE vs. TEMPERATURE

(FS = HIGH)

TEMPERATURE (°C)

20

100

9

12

-40

0

80

40

120

VIN = 4.5V

VIN = 5.0V

MEASURED AT TP1

1.0

0

-60

-20

60

140

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (°C)

20

100

0.4

0.8

-40

0

80

40

120

0.6

0.2

INCLUDES SWITCH LEAKAGE CURRENTS

260

160

-60

-20

60

140

D1, D2 FREQUENCY vs. TEMPERATURE

(FS = LOW)

TEMPERATURE (°C)

20

100

200

240

-40

0

80

40

120

220

180

VIN = 5.5V

VIN = 4.5V

VIN = 5.0V

VIN = 6.0V

850

400

-60

-20

60

140

SUPPLY CURRENT vs. TEMPERATURE

(FS = HIGH)

500

750

TEMPERATURE (°C)

20

100

650

600

450

550

800

700

-40

0

80

40

120

VIN = 5.5V

VIN = 6.0V

VIN = 4.5V

VIN = 5.0V

480

280

-60

-20

60

140

D1, D2 FREQUENCY vs. TEMPERATURE

(FS = HIGH)

TEMPERATURE (°C)

20

100

360

440

-40

0

80

40

120

400

320

VIN = 4.5V

VIN = 5.0V

VIN = 6.0V

VIN = 5.5V

550

250

-60

-20

60

140

SUPPLY CURRENT vs. TEMPERATURE

(FS = LOW)

TEMPERATURE (°C)

20

100

350

-40

0

80

40

120

300

400

500

450

600

VIN = 4.5V

VIN = 5.0V

VIN = 5.5V

VIN = 6.0V

100

0

40

120

200

EFFICIENCY vs. LOAD CURRENT

(FS = LOW)

20

80

LOAD CURRENT (mA)

80

160

60

40

10

30

90

70

50

20

60

140

100

180

VIN = 5.5V

VIN = 4.5V

__________________________________________Typical Operating Characteristics

(Circuit of Figure 6, VIN = 5V ±10%, TA = +25°C, unless otherwise noted.)

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