1µA Supply Current, 1Mbps, 3.0V to 5.5V,

RS-232 Transceivers with AutoShutdown Plus

16

______________________________________________________________________________________

MAX3244

MAX3245

FORCEON

23

R5OUT

15

R4OUT

16

R3OUT

17

R2OUT

18

R1OUT

19

R2OUTB

20

FORCEOFF

22

R5IN 8

R4IN 7

R3IN 6

R2IN

5

R1IN 4

GND

25

T3IN

12

T2IN

13

T1IN

14

C2-

2

C2+

1

C1-

24

C1+

28

T3OUT 11

T2OUT 10

T1OUT 9

V-

3

V+

27

C4

0.1

µF

C3

0.1

µF

C1

0.1

µF

0.1

µF

C2

0.1

µF

+3.3V

26

INVALID 21

AUTOSHUTDOWN

PLUS

MAX3226

MAX3227

FORCEON

READY

12

1

R1OUT

9

FORCEOFF 16

INVALID

10

GND

14

T1IN

11

C2-

6

C2+

5

C1-

4

C1+

2

R1IN 8

T1OUT 13

V-

7

V+

3

C4

0.1

µF

C3

0.1

µF

0.1

µF

15

C1

0.1

µF

C2

0.1

µF

+3.3V

TO POWER-

MANAGEMENT

UNIT

5k

MAX3224

MAX3225

FORCEON

READY

14

1

R2OUT

10

R1OUT

15

FORCEOFF 20

INVALID

11

R2IN

9

GND

18

RS-232

OUTPUTS

TTL/CMOS

INPUTS

T2IN

12

T1IN

13

C2-

6

C2+

5

C1-

4

C1+

2

R1IN 16

T2OUT 8

T1OUT 17

V-

7

V+

3

C4

0.1

µF

C3

0.1

µF

0.1

µF

19

C1

0.1

µF

C2

0.1

µF

+3.3V

RS-232

INPUTS

TO POWER-

MANAGEMENT

UNIT

TTL/CMOS

OUTPUTS

5k

5k

5k

5k

5k

5k

5k

AUTOSHUTDOWN

PLUS

AUTOSHUTDOWN

PLUS

___________________________________________________Typical Operating Circuits