Turning Ideas Into Reality

ABCircuits www.abcircuits.com POB 123 New Hill NC 27562 (919) 290-7104

Part Number SIOA7

Copyright © 2014 ABCircuits. Revised September 2014 Page 2 of 10

Example Circuits

INPUT A1

7 BITS INPUT/OUTPUT ETHERNET

OUTPUT A3

SEE EXPANSION CIRCUIT

OUTPUT A6

OUTPUT A0

+3.3

OUTPUT A5

INPUT A2

+3.3

OUTPUT A1

OUTPUT A2

INPUT A0

LANTRONIX

XPORT

1

2

3

4

5

6

7

8

GND

+3.3

-POR

OUT

IN

CP1

CP2

CP3

SIOA7

15

9

16

17

18

19

3

6

7

8

10

11

13

14

22

12

20

23

28

21

4

1

2

5

24

25

26

27

IA0

NC

IA2

IA4

IA6

NC

ADR1

OA5

OA3

OA1

NC

IA5

IA1

VSS

OA4

IA3

OA0

OA6

VDD

OA2

SOUT-

RXP

ADR3

NC

SIN-

ADR0

ADR2

TXE

INPUT A3

INPUT A6

INPUT A5

INPUT A4

OUTPUT A4

OUTPUT A5

TXD

INPUT A4

7 BITS INPUT/OUTPUT RS-232

GND

.1

VCC

OUTPUT A4

VCC

OUTPUT A2

RXD

INPUT A5

OUTPUT A1

OUTPUT A0

INPUT A2

DB9S

1

2

3

4

5

6

7

8

8

9

INPUT A0

U2

SEE NOTES

1

3

4

5

2

6

11

14

10

7

12

13

9

8

C1+

C1-

C2+

C2-

V+

V-

T1in

T1out

T2in

T2out

R1out

R1in

R2out

R2in

.1

.1

RS232

VCC

INPUT A1

OUTPUT A6

INPUT A3

INPUT A6

U2= MAX3232 FOR 3V RS232

U2= MAX232 FOR 5V RS232

SIOA7

15

9

16

17

18

19

3

6

7

8

10

11

13

14

22

12

20

23

28

21

4

1

2

5

24

25

26

27

IA0

NC

IA2

IA4

IA6

NC

ADR1

OA5

OA3

OA1

NC

IA5

IA1

VSS

OA4

IA3

OA0

OA6

VDD

OA2

SOUT-

RXP

ADR3

NC

SIN-

ADR0

ADR2

TXE

SEE EXPANSION CIRCUIT

OUTPUT A3

.1