Turning Ideas Into Reality

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

Part Number KBDSER16

+3.3

LANTRONIX

XPORT

1

2

3

4

5

6

7

8

GND

+3.3

-POR

OUT

IN

CP1

CP2

CP3

+3.3

PINS1X8

1

2

3

4

5

6

7

8

16 KEY ETHERNET KEYBOARD

1

2

3

4

5

6

7

8

9

*

0

#

A

B

C

D

KEYPAD

1

2

3

4

KBDSER16

11

5

12

13

14

15

1

2

3

4

6

7

9

10

18

8

16

19

20

17

COLX2

NC

COLX1

SOUT

NC

NC

ROWY1

ROWY2

ROWY3

ROWY4

NC

NC

COLX3

VSS

NC

COLX4

NC

NC

VDD

NC

Connection Diagram

KBDSER16

11

5

12

13

14

15

1

2

3

4

6

7

9

10

18

8

16

19

20

17

COLX2

NC

COLX1

SOUT

NC

NC

ROWY1

ROWY2

ROWY3

ROWY4

NC

NC

COLX3

VSS

NC

COLX4

NC

NC

VDD

NC

Pin Description

Pin #

Description

Pin #

Description

1

Row Y1

20

VDD

2

Row Y2

19

NC

3

Row Y3

18

NC

4

Row Y4

17

NC

5

NC

16

NC

6

NC

15

NC

7

NC

14

NC

8

Col X4

13

SOUT

9

Col X3

12

Col X1

10

VSS

21

Col X2

Col X1 – Col X4

These pins are open drain column driver outputs to the key matrix.

Row Y1 – Row Y4

These pins are the row inputs from the key matrix. These inputs have 5.6K (nominal) pull up

resistors on chip.